6 Maintenance
Checking engine speed
Minimum speed adjustment screw
Warning The maximum engine speed adjustment screw has been correctly set at the factory and sealed. DO NOT attempt to remove this seal.
Maximum speed adjustment screw
At full load (with the boat cruising) the maximum engine speed should be about 3,000 resp. 3600 RPM (see technical data page 101). If the engine does not reach this speed, it is being overloaded! If this is the case, check the ship’s propeller for defects or irregularities, and also to see that it is the correct pitch and diameter.
10
VD00931
VD00134
Lead seal
55 Checking engine speed
56 Adjusting engine idling speed
The engine idling speed should be 850 rpm.
If the engine speed differs from that stated above, it must be adjusted. The engine idling speed can be reset using the adjustment screw on the fuel pump.
• Allow the engine to warm up normally (until the coolant temperature reaches at least 60°C (140°F).) before checking and/or adjusting the idling speed. • Check the engine RPM using a rev. counter, or use the rev. counter fitted to the control panel.
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