COOLING
SYSTEM
Seawater
pump
DRIVE
BELT
ROUTING
Engine
circulation
pump
Alternat
or
<,
Alternator
169
SEAWATER
COOLING
SYSTEM
6. Refill the cooling system . Start the engine and check
for leaks. Recheck the clamps for tightness after operating
the engine for a few hours.
DRI VE BELTS
Inspect all drive belts at regular intervals to make sure
they are in good condition and are properly tensioned. Re-
place worn, frayed, cracked or glazed belts immediately.
The components to which they direct power are essent ial
to the safe and reliable operation of the boat. If correct ad-
justment is maintained on each belt, all will usually give
the same service life. For this reason, and because of the
cost involved in replacing an inner belt (requiring the re-
moval of the outer belt), it is a good idea to replace all
belts as a set. The added expense is small compared to the
cost
of
replacing the belts individually and eliminates the
possibility
of
a breakdown on the water, which could cost
far more in time and money.
Drive belts should be properly tensioned at all times. If
loose, the belts will not permit the driven components to
operate at maximum efficiency. The belts will also wear
rapidly because
of
the increased friction caused by slip-
page. Belts that are too tight will be overstressed and
prone to premature failure. An excessively tight belt will
Seawater
pump
CLOSED
COOLING
SYSTEM
also overstress the bearings, resulting in premature fail-
ure.
Only install heavy-duty belts. Do not install light-duty
belts, such as those designed for automobile use.
R
ef
er to
Figure
16 for drive belt routing diagrams.
Belt
Adjustment
R
ef
er to Chapter Three for belt adjustment procedures.
Belt
Replacement
Alternator drive belt replacem ent
Replace the alternator drive belt as follows:
I. Loosen the alternator bracket and pivot bolts (Figure
17, typical).
2. Move the alternator toward the engine and slip the belt
off the crankshaft and alternator pulleys, and if equipped
with freshwater cooling, the circulating water pump pul-
ley.
3. Install a new belt over the pulleys.
4. Move the alternator away from the engine and adjust
the belt tension as described in Chapter Three.
8
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