97
CB108
Loosen hose clamps and remove the following hoses:
5 From engine circulating pump.
6 From oil/power steering fluid cooler.
7 Make sure that speedometer pitot tube, trim tab cavity vent hole,
and trim tab cavity drain passage are unobstructed.
After cooling system has been drained completely, install drain
plugs, reconnect hoses and tighten all hose clamps securely.
IMPORTANT: MerCruiser recommends that propylene glycol (a
nontoxic and environmentally safe) antifreeze be used in the
seawater section of the cooling system for cold weather or ex-
tended storage. Make sure that the propylene glycol antifreeze
contains a rust inhibitor and is recommended for use in marine
engines. Be certain to follow the propylene glycol manufactur-
er’s recommendations.
8 For additional assurance against freezing and rust, remove the
thermostat cover and thermostat. Fill the engine seawater cooling
system with a mixture of antifreeze and tap water mixed to manufac-
turer’s recommendation to protect engine to the lowest temperature
to which it will be exposed during cold weather or extended storage.
Using a new gasket, reinstall thermostat and cover. Tighten cover
bolts securely.
Perform all checks, inspections, lubrication, and fluid changes out-
lined in MAINTENANCE CHART under AT LEAST ONCE A YEAR.
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