Quote:
Originally Posted by pelican
i think you might wanna check that cooling system again - i don't think merc manifolds are freshwater cooled.
the cooling passages will erode - the gasket surfaces erode too - mercs are not as prone to this,later model mercs - they use a "dry joint" system...
those MPI'S with the horizon package - like the one you have,is it new as in 2011 ? if so,it would be equipped with catalytic converters - to pass the emissions standard ...your engine cat equipped ?
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There is a closed cooling system and a half system. The half system flows fresh water through the engine only the full system does the manifolds also with block off gaskets at the risers. On a full system salt or raw water only passes through the risers and out the exhaust. You can plmb the mercruisers either way.
