Checking engine speed

6 Maintenance

Checking engine speed

Warning

The maximum engine speed adjustment screw has been correctly set at the factory and sealed. DO NOT attempt to remove this seal. Minimum speed adjustment screw

Maximum speed adjustment screw

Lead seal

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.

55 Checking engine speed

VD00134

The engine idling speed should be 850 rpm.

• 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.

56 Adjusting engine idling speed

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.