EXHAUST SYSTEM
5.8
Your boat is equipped with a water injected exhaust system
which cools the exhaust as it exits from the engine. See following
page for description and a diagram of this system. If the flow of
cooling water is interrupted and the engine overheats severely, the
rubber hose coming from the engine exhaust elbow may melt. Always
check this hose after an occurance of overheating.
There will always be a little water in the bottom of the water
lift "pot". In fall decommissioning, the pot should be drained
using the drain plug, or anti-freeze added to the pot so the
residual water will not freeze.
If the engine is cranked for a prolonged period of time the engine
cooling x^rater may build up in the pot. In this very unlikely
situation, the drain on the pot should be opened.
Before engine cooling water is injected into the exhaust elbow,
it runs up to a point above the waterline, where either an anti-
syphon valve or an overboard vent admits air to the line when the
engine is off, to prevent syphoning. Especially if operating in
dirty water, the anti-syphon valve may clog, and fail to admit
air at engine shutdown. Check the operation of, and lubricate the
antisyphon valve frequently.
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