What oil is suitable for a Yamaha outboard motor? Motor and transmission oils Yamalube. Sale, delivery The most common of them

Which oil is better for two-stroke and 4t outboard motors

A variety of properties are required from oil, depending on the type of outboard motor. Today I will tell you how to understand all the nuances of the choice and what it is worth voting for with the ruble.

Motor oil for outboard motors 2t

Such oil works in a mixture with gasoline. The product should have good combustibility and low ash content. It's good when two-stroke outboard oil burns with gasoline, leaving no residue. Otherwise, carbon deposits form on candles, piston rings, and in the combustion chamber. Plus, the motor will be great to "smoke", which is also a minus.

Oil for outboard motors 4t (four-stroke)

For 4-stroke engines, other characteristics are relevant. Such mechanisms literally float in the lubricant, the maximum reduction in friction and excellent holding power on the metal are of key importance. Higher demands are placed on high-speed sports engines.

All declared performance characteristics should be maintained longer than with 2-stroke engines. I advise you to pay attention to gear oil for outboard motors from Yamalube, it is ideal for heavy loads.

Which oil for outboard motors 2t is better for additives

Products in this segment do not have an exact chemical composition. In fact, it is a mixture of various carbohydrates and additives. Special additives significantly increase performance.

The most common of them are:

• anti-oxidation, anti-corrosion– protect against chemical corrosion of metal. This is very important for outboard motors, as they operate in high humidity conditions;
• detergents- wash off solid particles, soot, clean the surface;
• antifoam- block the formation of foam. Otherwise, it can provoke a dry mode of operation of the mechanism. This is a direct path to seizing and high wear;
• anti-wear, anti-seize– Protects parts subject to friction from wear.

What are bioadditives

The main ones include additives for rapid decomposition in nature. The bottom line is that in the design of 2-stroke engines, part of the gasoline-oil mixture “flies into the pipe”. Because of this, in some European countries, the use of such engines is prohibited. Additives protect the environment and increase the cost of the product by 50-80%, which is significant. For the mechanism itself, this does not bring any benefit.

There are additives that correct the viscosity index and reduce the pour point. The higher the degree of viscosity, the thicker the lubricant. The optimal solution can be found in the technical specifications of the motor. A less viscous substance burns better and accurately penetrates to the details. More viscous - gives high holding power and better protection. The golden mean is offered by the Quicksilver brand, pay attention to Motul oil for outboard motors.

Important little things

When choosing oil, it should be noted that products from different manufacturers should not be mixed. If the components react, it is possible to provoke a change in properties for the worse. Please note that the finished product cannot be stored for a long time. Base oils without additives are stored longer. In any case, it is better to buy a more "fresh" sample.

Familiarize yourself with the difference between different types of oils:

• mineral (base) oil in the gearbox of the outboard motor - are produced by separating oil into components. This is the best solution for small, partially middle class engines, old mechanisms. There is no point in overpaying for synthetics, since most of the properties will never be realized. Look for available options in the Lukoil line;
• semi-synthetic, synthetic- these varieties are obtained by processing polyalphaolefins. Products are noticeably more expensive, but more technologically advanced (Motul). In terms of characteristics, it is noticeably ahead of mineral comrades. This is the best option for engines with oil injection and dosage systems.

• MOTUL- the famous French brand specializes in the development and production of chemistry for vehicles and industry. Motul oils have no analogues and are suitable for daily use. The physical and chemical properties of the product are retained over a long service life and guarantee ideal operating conditions for engines;
• Husqvarna- the Swedish company has earned the status of the largest manufacturer of various garden tools, equipment and related products. Products demonstrate the highest quality and are used for domestic and professional needs;
• LUKOIL- the production of oils is a separate area of ​​activity of the Lukoil group. These products symbolize world-class quality and reliability. However, this is a very affordable price segment;
• Quicksilver- Australian brand specializes in the production of oils and cosmetics for various vehicles. The products successfully extend the service life of engines and contain unique additive packages;
• TOHATSU- The Japanese corporation also pleases with the consistently high quality of oils and cosmetics. We can talk about the protection of motors during operation in aggressive environments, protection against oxidation, corrosion, a significant increase in service life, which is confirmed by numerous reviews;
• Yamalube- This is a real world brand, known almost everywhere. It is engaged in the production of high-quality products for internal combustion engines, which successfully work in a variety of power plants. All oils undergo multi-stage laboratory tests.

Oils in the gearbox of the outboard motor

Oil Motul for outboard motors 2t brand MOTUL-TL90-0.27L

The French offer transmission demulsifying oil. It Specially designed for the processing of outboard motor gearboxes. Feel free to use the product on Yamaha, Evinrude, Tohatsu, Force, Suzuki, Johnson, Selva, Mariner, Seagull, Mercury engines. Not for use on gearboxes with electric reversing.

The product fully meets all the requirements of US STEEL 224 certification. It exhibits enhanced lubricity to dampen friction and wear. During operation, the noise of the gearbox is reduced. We can talk about high demulsifying, antifoaming, extreme pressure properties. The oil is able to work against corrosion and completely burns out in the engine, without forming waste that likes to clog the oil grid.

Replacement is carried out based on its own discretion or on the recommendation of the manufacturer - on average, once a year. Packaging - plastic tube 270 ml. Price - from 500 rubles.

Pros:

• high quality;
• eliminates problems with the engine plant;
• cares for the motor, gives protection against corrosion;
• increases the service life.

Minuses:

• high price.

Oil Motul for outboard motors 2t semi-synthetic Motul Outboard Tech 2T

This semi-synthetic engine oil performs well when poured into highly accelerated two-stroke engines and in engines with direct injection, regardless of the oil mixing system (Yamaha, Mariner, Evinrude, etc.). The product is well-designed and exceeds the requirements of the authoritative NMMA TC-W3 standard for waterjet and outboard motors. The fact is that it was developed using a special Technosynthese technology. This gives improved operational parameters, increases the service life of the components.

The formula mixes almost instantly with gasoline, does not cause any deposits in injection systems, and does not form carbon deposits on candles. Throughout the entire period of use, the oil remains stable. The product has a characteristic blue color, which makes it easier to control in the fuel mixture. Used with unleaded gasoline. It is recommended to mix the oil in a proportion of 1-2% in accordance with the operating conditions and the requirements of engine manufacturers. Packing - canister 1 l. Price - from 670 rubles.

Pros:

• successfully works on 2-stroke engines with direct injection and jet engines;
• suitable for expensive and cheap motors;
• mixes well;
• during operation, the engine practically does not produce smoke;
• the motor runs smoothly;
• wear reduction.

No cons found.

Oils for outboard motors 2-stroke

Husqvarna outboard oil 2-stroke HP

Another semi-synthetic friend of our rating is designed for Husqvarna two-stroke engines. The oil is characterized by a special formula adapted to Russian conditions and successfully works even with low-quality gasoline. The composition includes a package of additives that does not allow the formation of deposits on the crankcase.

The product is ideal for any two-stroke engine, starting from a boat, ending with a chainsaw. Semi-synthetic perfectly protects the motor from rust, corrosion, wear. The product does not lose its original characteristics for a long time during operation. Another advantage is that oil can be filled in after mineral oil, which is important for some engines with wear. Delivered to Russia canisters of 1 l. The cost is from 525 rubles.

Pros:

• no complaints about quality;
• after pouring, the engine starts with a half turn, does not jump at idle, works well;
• lubricates, reduces wear;
• protective properties;
• mixes well with gasoline.

Minuses:

• no small packaging;
• smokes.

Oil Lukoil 2t for outboard motors LUKOIL Moto 2T

It is a multipurpose mineral oil suitable for use in two-stroke gasoline engines of boats, motorcycles, mopeds, etc. The product is characterized by high quality, gives excellent anti-wear, anti-oxidation properties. This works for the precise functioning of the engine under any load.

The composition is based on high quality base oil, in which added a modern high-performance additive package. Taken together, this has several advantages - a much smaller number of failures in candles, a reduction in the risk of carbon deposits on the intake system, and the occurrence of glow ignition. The engine starts to work efficiently, fuel consumption is reduced. The recipe gives almost complete smokelessness and safety for the environment.

The mixing ratio depends on the requirements of the engine manufacturer. However, there is a standard norm for API TC class oils - the ratio of gasoline to oil is 50: 1. Packing - plastic canister 1 l. Price - from 99 rubles.

Pros:

• universal;
• perfectly lubricates the rubbing parts of the motor;
• affordable price;
• protection against corrosion, foaming, oxidation.

Minuses:

• the engine still smokes...

Gear oil for boat motors Quicksilver

Quicksilver Premium Gear Lube is a synthetic anti-emulsion gear oil formulated especially for outboard motor gearboxes. Its formula is synthesized taking into account the specific needs of such nodes. It gives wear resistance and excellent lubrication and works on engines of large and small power for various operating conditions.

The product contains a package of special additives. They work to protect the gears from direct metal contact. The unique formula allows us to talk about improving the quality of the boundary lubrication of gears. Provides effective lubrication and corrosion protection. Additives prevent foam, excessive wear, reduce noise. Unique substances increase stickiness, which works for a stronger adhesion of the oil film to internal components.

The oil has proven effective in marine applications. It is suitable for Evindure, Force, Johnson, Mariner, Yamaha, Tohatsu, Selva, Suzuki, Mercury outboard engines and speakers. Packing - plastic canister 1 l. Cost - from 907 rubles. There is a small package.

Pros:

• effective composition;
• corrosion protection;
• high quality;
• provides a clear, silent, smokeless operation of the engine;
• increases the resource.

Minuses:

• high price.

Oils for transmissions of outboard motors

Transmission oil for outboard motors TOHATSU Premium 80W-90

Like the previous brand, the Japanese offer premium gear oil. A special composition works here, which is economical and provides excellent lubrication. This product can be safely used on all marine gearboxes and outboard motor drives. that require SAE 80W-90 and GL-5 transmission oil.

The manufacturer has taken care of a good set of anti-corrosion and anti-seize additives. Thanks to him, the product provides complete protection of internal components from the development of corrosion and wear.

The application depends on the manufacturer's recommendations regarding the correct oil charge. As a rule, it is changed once every three months or every 50 hours of operation. Packing - plastic canister 1 l. Volume 0.946 l. The cost starts from 990 rubles.

Pros:

• excellent effective composition;
• suitable for all types of motors;
• provides lubrication, reducing wear;
• there are anti-friction additives;
• works against corrosion and scuffing.

Minuses:

• high price.

Yamalube outboard gear oil

We are talking about Yamalube Gear Oil SAE 90 GL-4 synthetic gear oil. This is a high quality product specially designed for gearboxes of all Yamaha outboard engines. The oil is designed to effectively protect all components operating at high speeds. I can say that this is true - the composition is tested and approved by Yamaha's water technology division - Yamaha Marine.

In terms of technical characteristics, the oil exceeds GL-4 standards, shows high resistance to decomposition and stability of work. There is a package of special additives (extreme pressure and high viscosity) that gives protection to gears under conditions of high loads and speeds. We can talk about decent thermal and oxidation resistance, which eliminates the formation of deposits near the seals. Of course, there are anti-foam properties.

Use must be based on the maintenance intervals specified by the manufacturer. This will ensure optimal lubrication of the components and smooth operation of the motor. Packaging - plastic tube, 350 ml. The cost starts from 630 rubles.

Pros:

• contains components that block the formation of corrosion and rust;
• provides a durable resource;
• suitable for Yamaha stationary engines and outboard motors;
• high anti-foam properties;
• retains a protective oil film and viscosity for a long time.

Minuses:

• high price.

Oil for boat motors Motul Suzuki Marine 4T SAE 10W40

The French developed semi-synthetic engine oil designed for Suzuki four-stroke gasoline engines. This is a high quality class, plus the product has received NMMA FC-W approval (a standard specifically designed for oils used in water technology).

Among the characteristics, I note the high value of HTPS. This indicates a good high-temperature viscosity (SAE 40 class), even with the accumulation of fuel in the oil, one can count on the strength of the oil film at high temperatures. The product really demonstrates stability during operation.

The oil is characterized by anti-corrosion properties, which helps to neutralize the aggressive action of the external environment, including salty sea water. Oxidation protection and powerful anti-foam properties work to reduce foaming during oil circulation. The drug does not clog the oil filter.

The frequency of replacement depends on the actual operating conditions, usually it is enough to change the oil once a year. In any case, you must rely on your own discretion and the recommendations of the manufacturer. Can be mixed with synthetic and mineral based oils. Packaging - plastic canister. Cost - from 3.1 tr. (for 5 l).

Pros:

• works well at high temperatures and under high loads;
• protection against corrosion, oxidation;
• does not allow foaming;
• does not clog filters;
• increases the life of the motor.

There are no cons.

An overview of oils for outboard motors and tips for choosing them are shown in the video:

When you buy a boat, the first thing to think about is what little is best for its motor so that it can work properly for a long time and does not need to be repaired. This choice will be in front of every owner of a PVC boat and this should be taken seriously, since the correct operation of the boat motor will depend on the quality of the selected oil.

There are usually two types of oils to choose from:

• synthetic;
• mineral.

In order to make the most correct purchase, you need to understand how these oils differ from each other, what are their advantages and disadvantages.

The main difference between these oils, of course, is their molecular structure, that is, you will have to look for differences in the very basis

.

It is worth noting that synthetic oils are considered very stable due to the fact that they are built with already defined preset parameters. Such oils are most often purchased specifically for boats.

Also, such an oil is considered very convenient, since even if mineral oil was used before, synthetic oil can easily replace it. However, if you do not know for sure what kind of oil was in the boat, it is best to use flush oil first, and only then synthetic oil.

The stability in the chemical composition of synthetic oil implies the safest mode of operation of the motor. That is, there will not be any transformations in it that can quite strongly change the operating time of the motor and its general characteristics.

So, choosing a synthetic oil, you can be sure that its viscosity will be the same over a different temperature range. From this phenomenon will significantly depend on how quickly the boat can start, for example, in the cold, as well as the stability of the motor at extremely high temperatures, and when it will be forced to work in difficult conditions.

In addition, synthetic oil is much more fluid than any other oil, which is also another positive factor. The excellent fluidity of the oil is also ensured by its composition, which is reliable and tested by highly qualified specialists, which is incomparable to the fluidity of mineral oil, and is also famous for its penetrating ability.

Read our. Tough criteria!

Synthetic oil for two-stroke outboard motors

If you haven't used synthetic oil before, there can be real problems when switching to it.

Most often, they are detected more critically if cheap and low-quality oils were previously used, and recommendations for changing the oil were often not followed, and any foreign substances were observed to get into it. Then the motor will begin to deteriorate due to harmful deposits accumulating in it. In this case, cracking of the seals in the motor can be noticed.

If mineral oil is used, then such deposits will peel off and come out gradually, but if synthetic oil is used, deposits, due to its high fluidity, will be washed out all at once, which can be dangerous, since the oil receiver mesh can simply become clogged because of this.

Oil starvation will occur and, as a result, we will get a damaged motor, no longer suitable for work or in need of expensive repairs.

How to choose oil for two-stroke outboard motors

Synthetic oil is best used from the very beginning, otherwise switching to it after any other foreign oils can turn out deplorably for a PVC boat motor.

So, consider when you can not use synthetic oil:

• deposits are observed in the motor;
• sealing elements are no longer elastic;
• during the "break-in" period;
• the motor has been overhauled.

In any other cases, synthetic oil will be an excellent option for your engine and guarantees it protection, thanks to which it will be able to work for a long time and without any breakdowns.

The main characteristics of oils for 2-stroke outboard motors

If you have just purchased a boat, then it should be “run in”. For this task, it is mineral oil that is best suited, and only after that you can start using synthetic oil. Then the motor on your boat can serve you for a really long time.

However, if you still decide to switch to "synthetics", but something went wrong, you can always independently assess the damage in order to apply the necessary actions that will not allow the boat's motor to fail.

Grade:

• assessment of the condition of the motor (presence of pronounced defects or seals, oil leakage);
• the presence of deposits in the motor (here it will be enough just to flush the oil supply system);
• sebaceous seals have ceased to be elastic (synthetics are not advised, it is better to use it after a quality repair and a “motor trip”).

If you still doubt whether your engine will withstand synthetic oil, you can start using "semi-synthetics" for a start.

What oil to choose for outboard motors

The most popular boat engines:

• suzuki;
• yamaha;
• tohatsu.

For these motors, individual oil should be selected. For a Suzuki engine, synthetic oil is quite suitable, which costs no more than five hundred rubles per liter.

For Yamaha, you can even use car oil, since this engine is considered stronger. Such oil costs differently, you can find it quite cheap, from 300 rubles, or very expensive, as they sell oils for Yamaha for 2000 rubles.

Mineral oils in the case of the Tohatsu engine or any mixtures made with the addition of automotive oils are best not to use. This motor is weaker than the Yamaha, so it is best to buy good synthetic oil, which costs around seven hundred rubles.

Motul oil for two-stroke outboard motors

Motul is considered a fairly popular boat oil. Such oil burns completely in the engine, due to which no waste is generated that can subsequently clog the oil grid, which will lead to unpleasant breakdowns in the future.

This oil works on the principle of mixing. That is, it enters the combustion chamber already along with the fuel, since two-stroke outboard engines always have a “combined” mixing system.

How long will a two-stroke outboard motor run without oil?

The motor may well work without oil, but it will not be able to hold out for a long time. That is, the engine without oil will run at idle. This happens because even after removing the oil, an oil film remains and until it completely exhausts itself, the motor will be able to work.

The oil protects the motor from friction while the piston moves inside the motor. Naturally, the motor will stop working when the oil runs out completely and most likely it may even become unusable.

Therefore, the oil for the boat must be chosen correctly, taking into account all its characteristics. Only in this case, the motor boat will be able to serve its owner for a long time and move around the most dangerous places on the river.

When faced with a choice before buying oil, you can always consult with more enlightened boat owners who have been using such a vehicle for a long time. After all, we all borrow that the selection of any part occurs by trial and error, and most often this is the best option, since you will be able to evaluate each oil and choose the one that will suit your boat the most.

Outboard motors have components in their design, the individual parts of which are subject to wear as a result of friction. One of these components in the engine is the gearbox. To protect against wear of rubbing pairs, a special one is used.

Any lubricant during operation reduces its protective functions, therefore it must be replaced after a certain time. Outboard motor gearbox oil can be changed by your dealer. The procedure for changing the oil in the gearbox is simple, but requires compliance with certain rules. Therefore, many motor owners change the oil in the PLM gearbox on their own.

Read our. Tough criteria!

How to choose oil for a boat motor gearbox

The peculiarity of the operation of the motors is such that the gearbox with the screw works under water. The engine itself, together with the gearbox, has a water cooling system. That is, inside the engine, water circulates through special channels, which comes from the reservoir and cools the parts heated by friction.

Despite the protection of the internal parts of the gearbox from water with rubber seals and bushings, water ingress is inevitable over time. Water, salts in sea water create a destructive environment for rubbing nodes, rust and corrosion appear.

Motor manufacturers recommend using special oils for the gearbox that contain additives that bind water. Anti-emulsion additives resist the formation of an emulsion, but their possibilities are not unlimited. Of course, they will not cope with a large volume of water.

Anti-corrosion additives may also be present in the oil to prevent rust and corrosion from forming. They have a special effect when operating motors at sea in salt water.

Transmission oils used in gearboxes and gearboxes of automobiles do not have a set of anti-corrosion and anti-emulsion additives that bind water and protect rubbing vapors from oil starvation. Manufacturers of outboard motors do not recommend their use. Benefiting from their low cost can result in costly gearbox repairs.

The viscosity of gear oils, which ensures reliable operation of outboard motor gearboxes, must comply with the SAE 80W-90 class. Stationary outboard motors require oil with a viscosity of SAE 85W-90.

According to API standards, transmission oils for gearboxes of outboard motors must meet the GL-4 or GL-5 class.

API GL-4 oils are intended for lubrication of bevel and hypoid gears, which have a slight displacement of the axes, operating in conditions varying in severity - from light to heavy. Typically contains half the amount of additives used in higher API GL-5 oils.

API GL-5 oils used for heavier hypoid gears with significant offset gears operating in harsh conditions.

Thus, API GL-5 oils have a greater number of additives, provide better extreme pressure properties, protect rubbing surfaces under conditions of shock, high loads and pressures. That is, API GL-5 oils completely cover the requirements of the API GL-4 standard.

What oil is used for the outboard motor gearbox

Oil according to SAE and API standards, which must be filled into the motor gearbox, is indicated by the manufacturer in the passport for the PLM. In addition, for each brand of engines, oil from a certain manufacturer is recommended.

Yamaha engine oil

Protection during operation of the gearbox at high speeds, against corrosion, rust is provided by the set of additives contained in the oil. They provide a long service life for the motors. The oil film on the surface of friction units is resistant to oxidation and high temperatures. The oil eliminates deposits near the seals, does not form foam.

Tohatsu engine oil

Tohatsu does not give preference to any oil manufacturer. It is possible to fill in the gearboxes of its motors with oil of any manufacturer that meets the requirements of API GL-5, SAE 80W-90.

Mercury engine oil

Mercury recommends exclusively Quicksilver oils for its engines, in the line of which there are 3 groups of gear oils. Premium oil is used for gearboxes of all types of outboard motors up to 75 hp. and complies with SAE 80W-90.

MerCruiser inboard engines, outboards with power greater than 75 hp require High Performance oil. Do not mix these oils with each other. The oils contain a unique package of additives that reduce the appearance of emulsion when water enters the gearbox housing.

How much oil is in the gearbox of the outboard motor

Engines of different power from manufacturers differ from each other in the design of the gearbox. The higher the power, the more loads the gearbox parts experience. Since the dimensions of the gearbox increase with the motor power, a correspondingly larger amount of lubricant is required.

For example, for filling oil into Tohatsu gearboxes up to 6 hp. up to 200 ml is required. oils, up to 18 hp - 370 ml, 25, 30 hp – 430 ml, 40, 50 HP 500 ml, over 70 HP already need 900 ml. The amount of oil required from other manufacturers may vary slightly.

How to check the oil in the outboard motor gearbox

To check the oil in the gearbox:

• we put the motor vertically on a stand or transom;
• we find the upper (control) hole on the left side of the gearbox, unscrew the plug;
• we insert the probe into the hole, take it out, you can use an ordinary match as a probe;
• if the dipstick is dry, add oil.

How to change the oil in a boat motor gearbox

To change the oil, you will need:

• a container where it is necessary to drain the used oil;
• wide slotted screwdriver;
• stopper gaskets;
• a special pump for pumping large volume oil, if the volume is small, the oil is poured directly through the nozzle in the tube;
• new gear oil;
• stand for the outboard motor, if the motor is not installed on the transom.

Sequencing

• We install the motor on a stand with a vertical arrangement of the deadwood. If the motor is mounted on the transom, then the deadwood is also installed in a vertical position. The motor must be installed, slightly raised above the surface.
• We install a container under the motor for draining used oil.
• Unscrew the bottom drain plug. The oil will begin to drain into the drain container.
• Unscrew the top cap. We wait until the oil has completely drained from the gearbox (10 minutes). ATTENTION! Some "masters" after draining the oil recommend flushing the gearbox with gasoline. Under no circumstances should this be done. Gasoline destroys the seals, after which water enters the gearbox, forming an emulsion.
• Changing plug gaskets(while the used oil drains).
• Pour the purchased fresh oil into the gearbox. To fill small volumes of oil, special tubes (bottles) are used, which have a nozzle that is tightly inserted into the drain hole. If the volume is large, then special pumps are used. We insert a nozzle (tube) into the lower drain hole and squeeze the oil out of the tube (we pump oil from a large volume container with a pump).
• We stop filling oil, provided that oil begins to flow out of the upper control hole, and it's small without air bubbles.
• While holding the tube (pump), screw on the top cap.
• Remove the tube as quickly as possible to minimize oil loss ( pump) from the lower drain hole and tighten the drain plug. Some of the oil will still leak out. If the volume is small, then you should not worry.
• Checking the oil level unscrewing the upper control hole. If a lot of oil has leaked out, then you need to add it. A low oil level can damage the gearbox.
• Tighten the plugs tightly. We wipe the oil from the gearbox. Used oil is transferred to special enterprises for further disposal.

It needs to be known...

The topic of oil is perhaps one of the most discussed topics on various technical Internet resources. Not a single car or motorcycle forum can do without it. This is truly an endless topic for heated discussions. So a person bought a boat motor and immediately it comes to oils that are better to be poured into it. The need for reliable lubrication and heat dissipation from the internal parts of the engine is the main function of engine oil. No one argues with this and this fact does not cause any doubts. But few people think that the task of cooling the engine is also assigned to the oil, and not just to the water in the cooling system. Engine oil is, if not the main, then without a doubt a very important coolant in the engine!

Water has access only to the outer jacket of the cylinders and the engine head. To the crankshaft and liners, as well as to the piston rings, water is simply not allowed in due to the design of the cooling system. Engine oil, on the other hand, circulates inside and is in constant contact with engine parts. The oil takes on thermal energy from the piston crown, crankshaft journals and liners, piston rings - these are the points that carry the main heat load and the temperature here is much higher than the "average" temperature indicated by arrows or numbers on the dashboard.

About the quality of oils.

Since the quality of lubrication of almost all modern oils is at a fairly high level and is beyond doubt, such a concept as oil resistance to high temperatures comes to the fore. And here, just for the consumer, differences begin in conventional oils (used in a car) and in oils for special equipment such as outboard motors, motorcycles, snowmobiles, etc.

What happens inside the engine of a boat motor?

The most common problem of modern engines is coking of piston oil scraper rings and, as a result, after a while we have oil consumption. Oil scraper rings simply do not work, they do not fulfill their direct function - removing oil from the cylinder wall, because they are coked and have lost the ability to move in the groove. Look carefully at the oil scraper ring on the piston in the figure, it is the lowest. It simply cannot do its job, and the oil drain holes are also clogged. The reason is the thick composition (coke) into which the engine oil has turned. It can be argued that the natural wear and tear from the operation of this ring is minimal or non-existent. In other words, while the oil performed its functions and did not turn into soot, "immobilizing" the oil scraper ring, the engine did not consume oil (it did not enter the combustion chamber).

Let's take a closer look at the next photo. Before us is the case of a four-stroke engine, with decent oil consumption. According to the owner of the motor, he used oil of a well-known brand, perhaps a fake one came across, we won’t guess, but the fact is in front of you.

Why is there oil consumption? How to avoid it?

The photo shows that the pistons do not have natural wear (wear is minimal), the surface has a factory notch, there are no strong abrasions and nadir. But the oil scraper rings are simply - simply "lie down". The oil drain holes are completely clogged. In this case, the compression rings are in perfect order. Still would! There is more than enough oil to lubricate them, because it is not delayed by the oil scraper ring and passes straight through the compression rings (lubricating them abundantly) and further into the combustion chamber. Such a four-stroke outboard engine happily consumes liters of oil, more than a two-stroke. If you bring such a motor for maintenance to a service, they will measure the compression - the indicators will be excellent, better than on a new one! Servicemen will do maintenance and let you go on all four sides, there is nothing to complain about, nominally according to the service manual, all work and measurements have been done, all indicators are normal. And at this very time, the motor simply “eats” oil ... One could raise the issue of a guarantee, but this is a separate story ... So before us a typical case when the oil simply could not withstand the thermal load in the area of ​​​​the piston rings.

Numerous studies of modern internal combustion engines have proven that the engine will operate with virtually no wear as long as the oil "works" in it. Just look at the tests of the engine of a car that has passed 1 million kilometers in the factory laboratory, after which it was disassembled and examined. There was practically no production of basic parts, such as pistons, liners, rings. This shows that a good quality engine oil actually lubricates and keeps the engine at a level that ensures minimal wear.

But what happens when regular oil from an auto shop (maybe a well-known brand) works in a boat engine? Its properties have not been investigated in this particular engine. It is not known how well this oil corresponds to the thermal operating conditions of this outboard motor. The oil retains visible properties, but at the same time it imperceptibly decomposes, coke, loses the additive package, does not withstand thermal stress and causes further problems, such as ring sticking, as in the picture above. At the same time, on the instruments showing the temperature of the engine, you see quite normal readings ... There is no overheating! The main problem is that overheating is already there, it's just local. Coking oil has done its job long ago. While the water temperature sensor in the engine records the normal operating temperature, we observe on the device, in fact, the "average temperature in the hospital" and make the wrong conclusion that everything is fine with the engine ... at a time when some "hospital patients" already in the morgue.

How to avoid problems with coking and further troubles? You just need to follow simple recommendations.

Automotive oil in a boat engine. Right move?

Is car oil suitable for boat engines?

The outboard motor runs at a different speed, two to three times the speed of the car when driving (car) on the highway. The operating environment of the outboard motor is different, this is prohibitive humidity and increased loads, which impose increased requirements on the quality of the oil. The movement occurs under load, the resistance of the aquatic environment counteracts the thrust of the engine of the outboard motor much more than the rolling resistance of the wheels of the car. At the same time, it must be remembered that the properties of automobile oil for operation in an outboard motor engine have simply not been studied.

In light of the above facts, for outboard motors, the use of a special outboard motor oil is highly recommended. This lubricant has been developed, researched and repeatedly tested in factory laboratory tests and in motor sports competitions. Also, technical specifications are provided for this oil in the public domain. The practice of working with outboard motors at the service also indicates good statistics on the use of these oils.

The general conclusion can be drawn as follows. If you are a researcher and experimenter by nature, if you intend to conduct experiments on your outboard motor - to your health. It is possible that the motor will work and nothing will happen to it. If, however, you do not want to bother yourself with thoughts about side effects and the expediency of experiments, the original outboard motor oil is your choice.

Oil in the gearbox (leg) of the outboard motor.

We figured out the engine oil, but what about the gearbox oil?

There is one important point here. Have you ever wondered why outboard motor manufacturers recommend changing gear oil every season, if not more frequently? Isn't it too often? Maybe this is just a trick of the manufacturer so that we go to the dealer for maintenance more often and, as a result, spend money on maintenance? This is partly true, but not entirely.

YAMAHA specifically recommends performing these maintenance tasks for another reason. You probably changed the oil in your leg, did it yourself or at the dealer. Didn’t it seem to you that quite a transparent oil, suitable for further use, is draining? So, Yamaha technicians teach in training to do this operation often just to make sure that no water got into the oil, that there were no chips in the oil, that it had turned into an emulsion (a liquid resembling coffee with milk, a mixture oil with water). Read more about the intricacies of maintaining the output shaft and gearbox: The practice of running in and using a boat motor.

Therefore, the point of changing the gear oil is not so much in oil wear due to mileage and wear, but in diagnosing the gearbox and its internals of your outboard motor. Imagine, when replacing, an emulsion instead of oil merged. You can still save the gearbox by flushing and there is at least a chance to save the assembly. It must be understood that the operating conditions of the outboard motor are different from normal conditions, for example, the operating conditions of a conventional car.

Here, rather, the operation of an SUV can be compared, in which, by the way, it is recommended to replace gear oils in gearboxes after each “ride” through deep mud and swamps. Thus, we advise you to change the oil in the leg as often as you can afford, because it is better to prevent the failure of an expensive part than to think about expensive repairs later, especially since the original outboard motor oil is very inexpensive.

Evgeny Bronov

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What oil is suitable for a Yamaha outboard motor?

Unlike the Soviet era, today there are many specialized oils for outboard motors (plm). Previously, boaters somehow managed to get by with literally improvised means, unable to get oil in times of shortage. However, when equipment from the United States of America, Japan and China came to our market, the picture changed quite a lot. High-quality motorcycles from these countries require more careful maintenance. Gradually, motor oils for engines began to appear on the market.

Today you can find many of these oils. Each of them has its own individual qualities. Typically, engine oil manufacturers rely on 1-2 functions of such a lubricant. Someone pursues the goal of ridding the outboard motor of soot, other companies are trying to protect their units from soot, and so on.

As for specific brands, they have their own specialized oils that are best suited for their engines. There are several specialized engine oils for a Yamaha outboard motor at once. Each of them is aimed at certain specific functions in their work.

Engine oil is the key to the good operation of the outboard motor

The question of which engine oil to choose for the engine arises immediately after acquiring a boat unit. As mentioned, the role of oil in the operation of the engine cannot be overestimated. It lubricates the parts, makes them stronger and more durable, rids the motor of soot and smoke, and in general makes the motor more reliable, strong, durable and functional:

1. motor oil has its main function or a specific role that it must fulfill. Most importantly, the oil must provide reliable lubrication to the parts and remove heat from the internal parts of the engine. It is also essential for engine oil to keep the outboard motor cool. Some people think that only the water in the outboard motor cooling system should do this. But it is not so. In fact, motor oil is one of the main components of engine cooling;

The fact is that water has access only to the outer jacket of parts such as cylinders and engine heads. But there are also parts such as liners, piston rings and a crankshaft. In turn, engine oil is in constant interaction with almost all engine parts. It can absorb the heat from the bottom of such parts as the piston head, shaft and liners that were mentioned. It turns out that it is precisely on these parts that a rather strong load of heat goes.

1. The quality of most modern oils today is at a decent level. The high technologies of our century have done their job. Therefore, the most important factor is precisely the resistance of the oil to warm air and elevated temperatures inside the engine. And precisely, if we touch on this moment, there is a separation between automotive oils and specialized oils that are used for a particular technique, such as outboard motors, snowmobiles, motorcycles, and so on. Specialized oil does a much better job of the above function;
2. it’s worth mentioning right away that you don’t need to use simple ordinary oil from a car store, otherwise there may be disastrous consequences. This oil, while retaining its properties purely outwardly, will actually decompose and lose its important additive;
3. this, in turn, entails that the oil cannot cope with the thermal load assigned to it and causes problems in the operation of the motor. What can happen in this case? It happens that there is a occurrence of rings. And worst of all, the instruments that reflect the temperature of your engine will show a completely normal temperature. That is, the owner of the boat will not even understand that overheating is starting. And that could end in disaster.

Yamaha is one of the most trusted boat companies in the world. Yamaha boats and outboards are usually of the highest quality. Motors of this brand are usually distinguished by extreme durability and reliability. For this, it is necessary that they have the most suitable. It is this that allows the motors to serve a long service life and operate smoothly.

It should be understood that Yamaha has a very wide range of outboard motors. Each model has its own special functions and characteristics. That is why every Yamaha outboard engine will need a certain type of engine oil.

Motor oil Yamalube 2-Stroke Oil Premium. This outboard oil is generally preferred by owners of Yamaha 2-stroke outboard engines. On sale it comes in different sizes - you can often find options for 5 liters and 20 liters. This mineral type of engine oil is distinguished by its excellent quality.

This oil is designed for outboard motors that are designed for a pre-mix system. It should be noted that this oil perfectly complies with all high international standards that apply to motor oils. By using Yamalube 2-Stroke, your outboard motor will have superior wear protection for parts such as engine pistons. This oil also cleans outboard motor components well, including pistons and exhaust ports.

Another type of oil is Yamalube 4M, which is mainly designed for Yamaha four-stroke outboard engines. It is also a very high quality oil, which has a very high efficiency and practicality. Designed specifically for Yamaha engines, this oil is carefully checked, tested, and then approved by the special division of Yamaha brand water technology.

This type of oil has excellent oxidizing properties that protect and clean your outboard motor parts. Also, the outboard motor will be perfectly protected even with heavy loads of your boat. In addition, this type of engine oil prevents the formation of corrosion in the engine and has anti-foam properties:

• another type of oil is Yamalube 4W mineral oil for 4-stroke engines. This high-quality mineral oil is specially formulated for 4-stroke outboard engines, which are installed specifically on Yamaha jet skis and sport boats. This oil is ideal for strong and powerful engines. It has additives that protect the outboard motor from wear and such an unpleasant phenomenon as corrosion;
• and the last type of oil is gear oil for Yamalube HD PLA. This is a specialized gear oil that must be used specifically in the gearboxes of Yamaha outboard motors of certain models since 2010. This type of oil has also been extensively tested and approved by Yamaha's Aquatic Division. Interestingly, the oil is very rich in various modern technological additives.