KUMATSUGEN GM2500 Mode D'emploi page 7

EN
Outboard Motor Maintenance
Fuel System
The fuel system should be regularly inspected for leaks, cracks or malfunction.
Fuel System Inspection
1. Carburettor leakage. Fuel hose cracks or other damage
2. Fuel pump malfunction or leakage. Fuel filter leakage
3. Fuel tank leakage. Fuel connector leakage
4. Fuel hose joint leakage. Primer bulb leakage or damage
5. Fuel hose cracks or other damage
6. Fuel filter leakage
7. Fuel connector leakage
8. Primer bulb leakage or damage
Cleaning the portable fuel tank and its filter
At least once every six months, empty the fuel tank, pour a small quantity of detergent, and clean the tank thoroughly by
shaking it. Flush the inside with fresh water and drain it completely. Repeat the flushing and draining procedures several
times until all the detergent has been removed from inside the tank.
Thoroughly clean the tank filter (located at the end of the suction pipe) with detergent and air dry.
Cleaning the engine fuel filter
The engine fuel filter should be cleaned every 20 hours of operation or every month.
In some countries, the fuel quality is poor so cleaning of the filter should be carried out more frequently.
Stop the engine before removing the filter. Keep away from sparks, cigarettes, flames or other sources of ignition.
Remove the fuel hoses and clean the filter with detergent. Air dry the filter then put it back in place making sure the filter
case is tightly screwed.
Gearbox Oil Change
Gearbox oil should be changed every 100 hours of operation or three months, whatever comes first.
Drain the gearbox into a container by opening the oil-drain plug ,then the oil-level plug. With the outboard motor in the
upright position, inject the recommended gear-box oil into the oil-drain plug hole until it starts to flow out of the oil-level plug
hole. Insert and tighten both the drain plugs.
Spark Plugs
Cleaning or replacing spark plugs
The spark plugs of an outboard motor can become oily and coated in a black deposit in a short time. When this happens the
motor will run roughly or may even fail to start.
Spark plugs should therefore be removed and inspected after 20 hours of operation or once a month. If spark plugs are dirty
they should be cleaned or replaced with new ones as recommended for that type of motor.
Checking for spark
If an outboard turns over but does not start, the spark plug should be checked for spark to find the problem. To do this, you
should first make sure that there is good ventilation and no fuel vapour present. Remove the spark plug from the engine and
reconnect it to its lead. Hold its body against the engine block (to earth it) and turn the engine over. Spark should be seen
across the gap. Keep the spark plug away from the plug hole to safeguard against the risk of ignition.
If spark present: Plugs are dry - check fuel supply, lines, filters.
Plugs are dirty - clean or replace plugs.
Plugs are wet - engine flooded, let stand for a while and try again.
If no spark: Loose or wet wiring. Check all wiring connections for tightness, should be clean and dry.
Spray dirty, wet wiring with water-repellent spray. If engine still does not start, seek mechanical advice.
Take care when replacing spark plugs not to over tighten as this may damage the plug or make it difficult to unscrew.
Propellers
Propellers are easily damaged by hazards in the water, hitting the bottom and corrosion. Even slight damage can cause a
reduction in speed. Propellers on outboard motors are fitted with a shear pin, which is designed to break, if the propeller hits
a solid object. The pin is easily replaced.
If a propeller blade is bent or badly chipped, it is best to fit a new propeller as it will not work very well. Make sure you only fit
propeller, which is recommended by the outboard manufacturer.
Every three months, the propeller should be pulled off and the propeller shaft greased.
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