Hunter MH37, Operator'S Manual, Page: 249 / 271

Maintenance
14.7
14.4 Mechanical Systems and Components
Refer to the OEM manuals supplied by the boat com-
ponent manufacturers for their recommended periodic
maintenance. These manuals may indicate maintenance
requirements beyond the minimum maintenance tasks
listed in the maintenance charts located in the back of
this chapter.
NOTE: In case of conflicts between the maintenance informa-
tion in this manual and the manuals supplied by the equipment
manufacturer, the equipment OEM manuals take precedence.
14.4.1 Engine Oil
See the engine/generator’s manufacturer’s manual for
recommended oils and correct procedures for checking
and replenishing oil.
14.4.2 Engine Coolant
See the engine/generator manufacturer’s manual for rec-
ommended coolants and correct procedures for checking
and adding coolant.
WARNING
! !
Hot coolant under pressure may boil over and cause
burns or other serious injury when cap is removed.
Allow engine to cool. Open pressure cap slowly to
allow pressure to vent before removing cap.
14.4.3 Engine Exhaust
Visually inspect the engine and generator exhaust sys-
tems (hoses, joints, manifolds, etc.) for leaks. Make sure
all clamps are tight. Check hoses and exhaust boxes
for damage. Replace any damaged exhaust system
component.
NOTE: Any discoloration around a joint or gasket usually indi-
cates a leak.
14.4.4 Fuel Filter
Check all fuel filters daily to remove all sediment and
water from the filter. Inspect the canister for possible cor-
rosion or deterioration. Replace canister if you observe
any corrosion or other deterioration.
Replace the filter element at least once each season,
more often if there is contamination of the fuel system.
Always replace the bowl gasket each time the filter is
reassembled. Check carefully for any signs of leakage.
14.4.5 Fuel Line Connections
Check all fuel line connections for leaks at least once a
year. Tighten as necessary.
IMPORTANT: Be careful when tightening fittings. Over-tight-
ening can crack the flair fittings and flair nuts. Use only tube
wrenches when tightening connections.
14.4.6 Batteries
WARNING
! !
If using lead-acid batteries, avoid spilling battery
electrolyte into the engine compartment or bilge.
Also, avoid getting saltwater on or in the battery. Ei-
ther condition can create a gas that is explosive and
poisonous if inhaled. If you spill electrolyte, venti-
late the area. Neutralize the acid in the electrolyte
with baking soda. Clean up neutralized electrolyte
with a disposable rag or paper towel.
We recommend you use Gel type batteries.
Although the batteries are relatively maintenance free,
some simple routine maintenance can increase the effec-
tiveness and life.
Keep the batteries fully charged. Batteries kept fully
charged last longer than batteries kept at a partial
charge.
If using lead-acid batteries, check the level of the elec-
trolyte regularly. Correct level is just above the plates.
Add distilled water only if necessary. Over-filling can
cause poor performance and early failure.
Check the battery every 30 days. Keep the top of the
battery clean. When necessary, clean the top of the
battery with a baking soda solution and rinse with fresh
water.
IMPORTANT: To prevent battery failure, do not allow the soda
solution to enter the battery cells.
Inspect the cables and clamps regularly.
Remove the battery cables and clean the battery termi-
nals and posts regularly. Use a wire brush or bronze
wool.
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