Westerbeke BCG4.0KW Operator's Manual page 55

Governor and Water Pump Bell Tension
iWARNINGI
Never attempt to adjust the drive belt's tension whOa the engine is in operation.
CAUTION
Excessive governor and water pump drive bell tension can cause rapid wear of the belt and
reduce the service life of the fresh water pump and governor shaft bearings. Excessive slack
or the presence of oil on the belt can cause belt slipping, resulting in high operating tempera-
tures, as well as poor regulation during generator load changes.
The governor and water pump drive belt is property adjusted if the belt can be deflected no less than 3/8
inch and no more than 1/2 inch (10 mm, 12 mm) as the belt is depressed with the thumb at the midpoint be-
tween the two pulleys on the longest span of the belt. (See the figure below.) Spare drive belts should be
carried on board.
Westerbeke Generators
lOUR PUll
3/0· TO 112·
DHl[CTIDN
Governor and Water Pump Belt Tension
52
FRESH
WATER
PUMP
CRAUSHAFT
PULLEY