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

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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 power.

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.

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Yamalube's legendary reputation is based on numerous race victories, but that's only part of the story... Yamaha's primary goal in creating the Yamalube brand is to provide customers with the best oil for their vehicle. Moreover, Yamalube oil is a high-tech product, and it is suitable for many other brands of engines, not only for Yamaha engines. Of course, there is no one oil that is ideal for all machines. That's why Yamalube offers the exact formula your engine needs. Every Yamalube oil is designed and manufactured by the same group of engineers that created the engine. They determine the right ingredients that are most suitable for the conditions in which the engine operates. All Yamalube oils are extensively tested in the lab and in the field to ensure maximum engine protection to the fullest. After all, this is exactly what you expect from Yamalube. Yamalube with a blue label is for water vehicles, while Yamalube with a red label is for land vehicles.

Motor oils carry codes such as "5W-30" or "10W-30". These indicate the classification of motor oils by viscosity adopted by the Society of Automotive Engineers (USA Society of Automotive Engineers: SAE). The oil is characterized by the fact that as the air temperature rises, its viscosity decreases (oil softens), and when the air temperature decreases, its viscosity increases (oil hardens). For full engine performance, it is important to use engine oil with optimal viscosity.

Yamalube 2

Price 420 rubles. Engine oil for 2-stroke engines. Mineral injector oil for outboard motors.
Naturally, any outboard motor oil must be approved by the NMMA TC-W3 standard. Yamalube oils are so good that they have been used as reference oils for many TC-W3 readings! This means that all other TW-C3 oils had to meet our high standards.

Peculiarities:
extremely effective formulation
An exceptional additive blend prevents power loss, compression ring sticking and carbon build-up, while special additives minimize wear. This oil has been formulated to withstand the harshest conditions your outboard may encounter. Whether the engine is running for long periods of time at full throttle, the boat is cruising at full throttle, or even trolling for hours, this oil stands up to any test. With its performance in tough conditions, Yamalube 2 also provides the best daily protection.

Corrosion protection
The formulation of this oil provides the best corrosion protection we have been able to achieve.

TC-W3 approved
With so many TC-W3 approved oils available, why would you choose Yamalube? Because outboard motors are Yamaha's speciality. Yamaha has gained an unparalleled reputation for the quality, performance and durability of its engines. Yamaha doesn't want to risk that reputation by selling substandard oils. Because we know our engines and their performance requirements intimately, we can offer the best oil for them. Having these high quality and performance standards allows our oils to exceed the minimum requirements of the TC-W3 standard.

Designed specifically for outboard motors. Not recommended for jet skis and sports boats.

Yamalube 4-CW

Price 420 rubles. Cold weather formula for 4-stroke motorcycles and ATVs.

The Yamalube 4-CW cold weather formula is designed to provide Yamaha vehicle owners with precisely formulated winter 4-stroke engine oils.

Performance Additives

Yamalube 4-CW contains more performance additives than conventional oils. These additives help control corrosion, carbon deposits and wear. As a result, Yamalube 4-CW provides low friction, high performance and longer engine life.

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 oils 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

Reading time: 3 minutes

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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. For engine oil, it is also extremely important to cool the outboard motor. Some people think that only the water in the outboard motor cooling system should do this. But it is not so. In fact, engine 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.