Volvo D 20 Operator's Manual download pdf (Page 24)

Operation

123

Avoid violent and unexpected changes in course and gear engagement. There is a risk that someone aboard will

fall over or overboard.

WARNING! A rotating propeller can cause serious injury. Check that nobody is in the water before engaging

ahead or astern. Never drive near bathers or in areas where people could be in the water.

Checking instruments

Check the instruments and warning display directly

after starting the engine and then at regular intervals

while driving the boat. Stop the engine if there is an

abnormal reading or any warning lamp comes on and

the alarm sounds. For engines with measuring

instruments the following standard values apply:

Engine coolant temperature (ECT) (1)

Normal operating temperature is between 75–95°C.

The acoustic alarm will automatically go off if the

engine coolant temperature (ECT) is too high.

IMPORTANT! If the alarm sounds: Reduce

engine speed to idle (neutral). Stop the engine if

the temperature does not drop. Investigate and

correct the malfunction.

Oil pressure (2)

Normal operating oil pressure is between 150–500 kPa

(21–71 psi). At engine idle this is normally lower. The

acoustic alarm will automatically go off if the oil

pressure is too low.

IMPORTANT! If the alarm sounds: Stop the

engine immediately. Investigate and correct the

malfunction.

Charging (3)

The operating charge volatage is approx. 14 V. When

the engine is stopped battery voltage is approx. 12 V.

Cruising speed

Operating the engine at full speed should be avoided

since it is both uneconomical and uncomfortable.

Volvo Penta recommends a cruising speed in the

range 500–1000 rpm lower than maximum rpm at full

speed. Depending on hull type, choice of propeller,

load and conditions etc. the maximum engine speed

at top speed can vary, but it should be within the full

speed range.

Full speed range: .......................... 2,800–3,200 rpm

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Volvo D 20 Operator's Manual Page 24