Grünwelt Maschinen Grunwelt GW-140FC, Manual

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6. Maintenance
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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 vapor
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 tight 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 a propeller, which is recommended by the outboard manufacturer.
Every three months, the propeller should be pulled off and the propeller shaft greased.