White smoke out one manifold

clasavi

Petty Officer 2nd Class
Joined
Mar 8, 2010
Messages
119
Just rebuilt Mercruiser 350 EFI Magnum w/new manifolds. Everything is brand new (spark plugs, wires, engine parts etc.). But did not work on fuel system.

When running one manifold is warm, the other cold. When I put it in gear, white smoke comes out of the warm manifold. Does not smell like burned oil. Smoke does not smell like anything.
Also, it may be related, when in gear, does not go above 2,000 RPM.
 

mciaio

Petty Officer 2nd Class
Joined
Mar 2, 2010
Messages
141
Re: White smoke out one manifold

Must be steam. Fresh water or raw water cooled? Did you install new head gaskets and check the heads for cracks and warpage?
 
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