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MISTAKE
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An exhaust line trapping too much water for length excess or negative gradient course,
that return back into the engine when the set is shut off.
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The first water lock muffler is designed for avoiding that risk, but if fitted not enough
lower than the engine manifold either reversing the entrance with the outlet, or of too reduced
capacity for the return water volume that has to contain, can be unable avoiding the problem.
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Particular care must be taken in designing the exhaust pipe course, preferring the
alternatives that keep self draining towards outside as more pipe stroke as possible.
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In any case, to be sure of a correct and safety installation, especially during the first
employment season, check often the lubrication oil integrity watching the engine steak level:
a transparent yellow oil if new or a black color if old, mean no water entrance, but an
emulsion similar to milk white/yellow not transparent or worst an increased level into the
sump mean water flooding.
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