502 mercruiser smoke by manifold

Rischman65

Member
Joined
Apr 17, 2006
RO Number
20898
Messages
2
This summer has not been good. Twice on the lake, twice the boat goes to the shop. I recently had my port side manifold cleaned by the shop with air and water. It seems to circulate fine now. The engine seems to be running perfect and the manifolds and risers are cool to the touch. When I accelerate the boat it begins to smoke underneath the manifolds. I can't seem to find out where are why this happens only when I accerlate to plane. Any help would be greatly appreciated. The boat is going back to the shop :).
 
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