Westerbeke 7.0KW BCG-60HERTZ Operator's Manual page 52

Govemor/Fresh Water!Raw Water Pump Belt Tension
IWARNINGI
Never attempt to adjust the drive belt's tension while the engine is in operation.
CAUTION
Excessive govemor and water pump drive belt 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
$lipping, resulting in high operating
temperatures,
as
well as poor regulation during generator load changes.
The governor and water pump drive belt is properly 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
between the two pulleys on the longest span of the
belt.
(See the figure below.) A spare drive belt should
be carried on board.
Governor
Belt tension
3/8-1/2 inch
Fresh Water
Pump Pulley
Front Crankshaft
Pulley
Govemor/Fresh Water/Raw Water Pump Belt Tension
Westerbeke Generators
46