Every owner of boating equipment knows that the reliability of the boat directly depends on the condition of his heart - outboard motor. Ignoring the planned procedures for the care of the unit inevitably leads to expensive repairs or complete replacement of components, which in the height of the season can be fatal for vacation plans. maintenance allows you to extend the life of the engine, maintain its traction specifications and ensure safety on the water.
The care process is divided into regular checks before each exit, seasonal maintenance (every 50-100 hours) and deep preservation before winter storage. Many beginners mistakenly believe that it is enough to change the oil in the gearbox, but the cooling system, the fuel line and the electrics require equal attention. In this article, we will discuss all the stages of work, necessary tools and critical points that should not be overlooked.
Regular inspection and preparation for water
Before starting the engine, you need to conduct a visual inspection of the body for cracks, chips and traces of corrosion. Particular attention should be paid to the condition of the lower unit, since this part is constantly in contact with water and is subjected to impacts on underwater obstacles. Any damage to the paint coating is better immediately painted to prevent oxidation of the metal.
Checking the motor's mounting system to the transom is a matter of safety. Make sure the rods are tightened with the necessary force and the safety rope is securely secured. If the motor is electric, check the battery contacts for no oxides and the density of the terminals. For gasoline models, it is critical to check the condition of the fuel hoses and paging pears.
Starting the engine on land is allowed only if there is a special container with water or connected to the water supply through the washing plug. Dry move If you start a water pump, even for a few seconds, you can melt it and fail it. Once you start, let the engine warm up at idle speed, make sure the jet is stable.
⚠️ Warning: Never start a motor without a coolant. Even short-term dry work destroys pump seals and can jam the thermostat.
An important step is to check the steering and the humming wheel. The course should be smooth, without jamming or backlashes. If you use remote control, check the cables for no cracks and rust. Lubrication of rubbing units should be carried out regularly with special marine lubricants that are resistant to washing.
Replacement of engine oil and filters
Timely oil change in the crankcase is the basis for longevity of the crankshaft mechanism. In the process of working, combustion products, metal shavings and moisture accumulate in the oil, which reduces its lubricating properties. The manufacturer usually regulates the first replacement after running (10 motor hours), and subsequent ones every 50 or 100 hours, or once a season.
The procedure will require an oil pump or a syringe, and a working tank. The oil should be changed on a warmed engine to make it more fluid and completely out of the system. Remember to replace the oil filter if your design is yours. four-stroke It's a presupposition.
- 🛢️ Pour the old oil through the drain hole or pump out with a probe.
- 🧹 Wipe the neck and replace the filter sealing ring.
- 💧 Pour a new oil of recommended viscosity (usually 10W-30 or 10W-40).
- 📏 Check the level by probe, not allowing overflow.
Using oil of inadequate viscosity can lead to engine overheating or, conversely, to difficult start in cold weather. Always focus on the manufacturer's specifications specified in the manual. For two-stroke engines, the procedure is easier, since the oil is mixed with gasoline, but here it is critical to observe the proportions of the mixture.
Use a special syringe or oil pump to completely remove the old liquid and wear products from the bottom of the crankcase.
Maintenance of cooling system and water pump
The cooling system is the Achilles heel of any outboard motor, and the main working element here is the rubber impeller of a water pump, which eventually loses its elasticity and wears off, and if you notice a decrease in the pressure of water from the control hole or an increase in the operating temperature, this is the first signal of problems.
Regular maintenance of the pump is recommended every 300 hours or every two seasons, even if there are no visible problems. Rubber is prone to aging and can crumble at the most inopportune moment. When replacing the impeller, be sure to lubricate its inner surface and shaft with thick silicone lubrication before the first start.
It is also important to check the condition of the thermostat, which is jammed in the closed position will cause instantaneous overheating, and in the open - to long warming up and increased fuel consumption, washing the cooling channels from salt deposits and algae is also part of the maintenance work.
| Element of the system | Symptom of malfunction | Action. |
|---|---|---|
| Piedfish | Weak water pressure | Impeller replacement |
| Thermostat | The engine doesn't warm. | Verification or replacement |
| Patrols | Antifreeze/water leak | Replacement of clamps |
| Check hole | Lack of jet | Cleaning the jellyclera |
⚠️ Warning: After operating in salt water, be sure to wash the cooling system with fresh water to prevent corrosion of the internal channels.
Regularly replacing the impeller with a water pump is the cheapest way to avoid major repairs to an overheated engine.
Fuel system and carburetor
Fuel quality and fuel system health directly affect engine stability: Modern engines are sensitive to the presence of water and dirt in gasoline; regular replacement of fuel filters (both internal and external) is mandatory; For four-stroke engines with an injector, this is critical because of the high accuracy of the injectors.
Carburetor engines require periodic cleaning of the jelly and idling adjustments. The accumulation of resinous deposits in long-term downtime can completely block the fuel supply. Using fuel stabilizers in conservation helps to avoid sludge inside the tank and highways.
Check the fuel hose for cracks and loss of elasticity, the paging pear must be elastic, and the back valves in it must work correctly, providing fuel current in only one direction, and any air suction in the system leads to impoverishment of the mixture and potential burnout of the piston.
- ⛽ Use only fresh fuel with the octane number specified in the instructions.
- 🧹 Change your fuel filters every season.
- 🔧 RUB the outer surface of the carburetor from dirt and oil.
Symptoms of carburetor clogging
The engine is not idling, it is stalled when you add gas, there is unstable operation at high speeds, it requires disassembly and ultrasonic cleaning.
Reductor: oil and propeller
The lower gearbox takes on the main mechanical loads and the external environment, the main task of the owner is to monitor the sealability of the oil oil and the quality of the oil, and check the oil in the gearbox should be carried out before each season and after every 50 motor hours.
The color and consistency of the oil will tell you about the condition of the knot. If the oil has become milky (emulsion), then water has entered the gearbox. This indicates a violation of the sealing of the ossels and requires immediate intervention. Metal shavings on the magnetic cork indicate wear of gears or bearings.
The propeller also requires inspection. Check the blades for no chips or cracks. The screw imbalance causes vibrations that destroy the lower unit and bearings. Be sure to lubricate the screw slate with antifriction lubricant and check for splint on the nut of the attachment.
To replace the oil in the gearbox, unscrew the bottom and top plugs. The oil should flow out of the water. When filling, use a special syringe, feeding the oil from the bottom up to displace the air. You only need to twist the plugs after the oil shows up in the top hole.
☑️ Checking the gearbox
Ignition plugs and electricians
In the ignition system, candles are the main consumption. They are a health indicator of the engine. By twisting the candle, you can tell whether the fuel is right and the carburetor is tuned. The normal color of the ignition is light brown or brick. Black loam indicates a rich mixture, white indicates poor or overheating.
The gap between the candle electrodes must be as specificated as the manufacturer. Too much gap can lead to ignition misses under load, especially in cold weather. High-voltage wires and caps should not have cracks through which a spark can penetrate, especially in wet weather.
The battery also requires maintenance. The plugs must be cleaned of oxides and lubricated with protective lubrication. If the motor is equipped with an electric starter, a weak battery charge can lead to a breakdown of the bendix or starter due to under-coiling of the engine.
⚠️ Warning: When installing new candles, do not drag them. Excessive force can damage the thread in the cylinder head, which will require costly repairs.
Always have a set of new spark plugs and a candle key in reserve - this is the most common reason for a sudden stop of the motor on water.
Preservation for winter
Proper conservation is key to a successful launch next spring. The main enemy of the engine in winter is moisture and old fuel. Gasoline oxidizes in a few months and turns into a resin that clogs the jellyflies, so the fuel from the float chamber and the tank must be fully decomposed or drained.
Two-stroke engines require the addition of conservation oil to the cylinder before storage, remove the candles, pour 20-30 ml of special oil and several times turn the crankshaft with a starter (or hands), spreading the lubrication over the walls, this will prevent corrosion of the cylinder and piston rings.
Keep the motor upright in a dry, ventilated room, cover it with a breathable case to avoid condensation buildup, and avoid plastic bags, as they create greenhouse effects and accelerate corrosion.
It is also important to treat the outer metal surfaces with an anti-corrosion spray, pay special attention to the places of the chipped paint. If the engine is stored on the boat, be sure to remove it or cover it with a special awning that protects against direct sunlight and precipitation.
Complete removal of fuel from the system and protection of cylinders from corrosion are two main conditions for successful wintering of the outboard motor.
How often should you change the oil in a four-stroke engine?
The first replacement is done after running (10 motor hours), then every 50 motor hours or once a year, whichever comes first, and in heavy use under heavy conditions, the interval can be reduced to 30 hours.
Can I use car oil for a outboard motor?
Not recommended, but outboard oils (marked FC-W) have a different additive package that protects against corrosion and works better at high water loads. Automotive oil can quickly lose its properties and cause corrosion.
What to do if water gets into the oil of the reducer?
It is urgent to replace the oil glands (oil removable and/or oel shaft), wash the gearbox with diesel fuel or special washing oil, then pour fresh lubricant. Operation with water in the gearbox will lead to the destruction of bearings and gears.
Do I need to take the engine off the boat for the winter?
It's desirable. It allows you to fully maintain your lower unit, protect your engine from weather conditions, and prevent theft. If you can't remove it, cover the engine with a good case and run off.