KUMATSUGEN GM1500 Manuel D'utilisation page 2

Introduction
This outboard engine has been designed and is intended for skippers of small boats (carrying capacity of less than 4
people), powered by outboard engine and operating in shallow waters.
Portable fuel tanks for outboard motors are fitted with a manual priming bulb. It is squeezed a few times to draw
fuel when first starting the engine or to continue to provide fuel to the engine in case of fuel pump failure. Care must
be taken to ensure that the bulb is not over squeezed as this may cause leaks in the fuel system or flood the engine
with too much fuel, making it difficult to start. The bulb should be squeezed only until it becomes firm.
The tank is also fitted with a breather screw, which must be loosened to vent the tank when operating the engine.
Ensure the breather screw is fully closed when transporting the tank to prevent spillage.
INTERNAL LUBRICATION SYSTEM
Four-stroke petrol engines are lubricated by oil circulation from the sump (crankcase).
Insufficient oil will cause the engine to overheat and eventually seize. Excessive oil will foul the spark plugs, cause
smoky exhaust and heavy carbon deposits. Both will cause engine failure.
MOUNTING AN OUTBOARD MOTOR
The method of securing an outboard motor to the vessel. Use of hand-tightened screw thread clamps. These clamp
the transom of the vessel between the engine mounting bracket and the screw thread plates. Their tightness should
be checked each time the engine is used. A safety rope or chain should also be used to secure the motor to the
vessel and prevent the motor from dropping from the boat if the clamps get loose during vessel operation. On larger
outboard motors, the mounting bracket is usually bolted through the transom plate. This is a more secure method,
but regular checks must be made for looseness.
Trim Angle
By changing the outboard motor's drive angle, the vessel's bow can be made to rise or fall. The performance and
stability of a vessel depends a great deal on correctly trimming the outboard. The correct trim angle depends on the
vessel's handling characteristics, the size of the outboard, the sea and loading conditions. Care must therefore be
taken to ensure the outboard is trimmed correctly under different sea and loading conditions. On smaller outboards,
the trim angle is adjusted manually by moving an adjusting rod to different holes in the mounting bracket. The bigger
outboards usually have a Trim Switch fitted on the remote control lever.
Loosen screw No.37 to adjust the tilt
Outboard engine mounted on boat
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