Tuning an outboard motor carburettor routinely Testament accumulate your engine running efficiently and bequeath you larger fuel economy. The outboard Engine uses two adjustment screws on the top of the carburettor that can be allot with a screwdriver. When you locate the reconciliation screws so the engine is running smoothly, it Testament drive at approximately 600 rpm. The carburettor is located at the top of the engine, under the engine housing.
Adjust the idle speed screw on the right counterclockwise, until the engine begins to stall, and turn the screw back 1/4 turn.
2. Turn both sluggish screws clockwise with a screwdriver, until they bottom out without over-tightening. Adjust both screws by turning them 1 1/4 turns counterclockwise with the screwdriver.
3. Start the engine, and let it warm up for a few minutes. Turn the air speed adjustment screw on the left counterclockwise, until you hear the engine start to stall out, and turn the screw back 1/4 turn.