Oil change in the reduction gear of the outboard motor: features, description of the process and recommendations

The outboard motor needs periodic maintenance. Its components undergo considerable mechanical and thermal influences during operation. To maintain the integrity of the working surfaces and prolong the life of the engine, a special motor oil is used. Especially in it needs a reducer. Therefore, wishing to extend the life of the iron heart of the vehicle, it is necessary to replace the lubricant every year.

Replacement of oil in the reducer of the boat engine can be carried out by own strength. After-sales service will cost much more. Over time, any oil ceases to cope with the functions assigned to it. Therefore, maintenance is carried out at least once a year, and even more often.

Engine Boat Features

The oil change in the reduction gear of the outboard motor has a number of features. This is due to the device of the engine. The reducer and screw are under water during operation. Thus the engine is arranged so that its systems are cooled by means of river or sea water. It comes through special channels inside the motor and is led to the rubbing mechanisms.

The parts of the gearbox are protected from moisture penetration by special glands. But over time, their sealing is inevitably disrupted. Some water gets inside. This is one of the main differences that characterize boat motors. Changing the oil in the gearbox in this case requires the use of special tools.

Automobile oils, although they are cheaper, are not suitable for this purpose. They are not able to keep such a quantity of water in a suspended state, not allowing its contact with the metal parts. Quality motor oil for the boat engine reliably protects the mechanism from corrosion.

Composition and viscosity

A certain composition of the maintenance substance requires boat engines. Oil change in the gearbox takes place with the participation of special composition. It includes a certain set of additives. They provide high-quality protection against corrosion.

Also, the oils for the boat engine have special emulsifying additives. They bind the water, preventing it from hitting the surface.

To ensure high-quality lubrication of the gearbox and prevent oil starvation, the products of the type shown are characterized by a certain viscosity. The features of the boat motor operation require the use of 80w-90 for hinged varieties, and 85w-90 for stationary engines. Car oil can be used in frost, and boat oil - only at temperatures above 0.

API standard

The viscosity of the oil can also be determined by the API system. In this case, GL-4 and 5 are required. The first version is used for servicing hypoid or cone gears that work with light or medium loads. Changing the oil in the gearbox of a outboard motor most often involves using a GL-4 class facility. But you should first look at the operating instructions from the manufacturer. There are recommendations for the selection of lubricants.

Stationary engines are more likely to operate under heavy loads. Therefore, it is preferable to use GL-5 oil for them. It contains a sufficient amount of extreme pressure additives, which prevent wear parts. In loaded mechanisms with significant axial shifts, this is extremely important. Especially if there is a chance of getting inside some water. Most often, when choosing oil, attention is drawn to engine power.

Yamaha Motor

Each engine manufacturer for the boat allows the use of certain types of oils for its machinery. This is necessarily taken into account when replacing them. It is also necessary to know what composition was poured in from the beginning. Some types of additives may be incompatible.

The replacement of oil in the reducer of Yamaha boat engine requires special means. The manufacturer recommends a specially developed mixture for transmissions. Yamalube Gear Oil is used for all boat engines of the presented brand.

A special set of additives demonstrates good extreme pressure properties. At the same time, a strong film covers the working surfaces. The product was tested in the laboratory by Yamaha. The agent was given an official permit.

The engine "Mercury"

Oil change in the reducer of the boat motor "Mercury" occurs according to another scheme. The manufacturer of such engines can only use a certain type of lubricant called Quicksilver.

The group of these oils includes 3 products. For outboard motors with a power of up to 70 liters. from. The Premium series is applied.

For stationary engines with a power of more than 70 liters. from. You will need to purchase a series of High Performance. It should be noted that these lubricants can not be mixed. In them, the additive package is very different. If they combine, the effect of the components will be significantly reduced.

The additive conflict will lead to rust formation on the working surfaces. At the same time, it will be necessary to repair the motor very soon or to purchase a new device in general. Therefore, the choice of oil must be approached very responsibly.

Removing a waste tool

When the oil in the reducer of the boat engine "Suzuki", "Yamaha", "Mercury", etc., is replaced, it is necessary to start by draining the used lubricant.

To do this, the engine should be installed vertically. Further, the special plugs for draining, which are in the gearbox, are untwisted.

The waste oil will have a dark color. If the mass follows, the shade of which is similar to coffee with milk, the system may be depressurized. A slight darkening of the liquid is considered the norm.

If, during the flow, literally a minute later the trickle of oil has decreased, then a cork has formed. This is a fairly common phenomenon.

The car pump will accelerate the process. The nozzle corresponding to the outlet of the drainage holes, if necessary, can be made independently from improvised means. After applying pressure, the spent mixture is quickly eliminated from the gearbox. There can be a lot of spray, so you should work on the street in special clothes.

Pouring new oil

Some owners of the presented vehicles claim that before filling the new mixture the engine needs to be washed with gasoline. But the replacement of oil in the reducer of the boat motor Parsun, Mercury, Suzuki and many others on this technology is unacceptable. Omentums lose their elasticity.

A nozzle of the container with a new oil is inserted into the bottom opening. Fill the grease in such an amount that it appears in the upper compartment.

Further, the nozzle of the container is not removed. Screw the lid on the upper hole. Before doing this, replace the gasket. Even if it does not look new, it needs to be updated. After that, the lower bolt also twists. Also it is required to replace the gasket. When tightening, do not use force.

Quantity of grease

Changing the oil in the reducer of the boat engine does not cause difficulties. It should be noted that the amount of lubricant that is poured into the reducer depends on the engine power. This is due to the large dimensions of the motor.

On average, for equipment with a capacity of 6 liters. from. About 200 ml of lubricant is required. Engine up to 30 liters. from. Will require to pour in it about 420-450 ml of the drug, and up to 50 liters. from. - 600 ml. If the boat has a stationary engine with a capacity of more than 70 liters. With., Oils will leave during procedure practically the whole liter.

Having become acquainted with the features and instructions that imply the replacement of oil in the reducer of the boat engine, you can do all the operations yourself. This will protect the engine from breakages and extend the life of the engine.