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I have a problem with my 1984 Mercruiser 3.0L: It is getting very hot at the block and head - especially toward the rear of the engine. The temp guage reads 140 and the t-stat housing seems fairly cool. The water intake hose is cold, and the manifold is just a bit warm to the touch (not hot)...
Engine: 1984 mercruiser 140
Kind of long, but I didn't want to leave anything out...
First, while running on the lake last weekend, engine started bogging out at high RPM - limped into shore, pulled boat out. looked in valve cover found water mixed w/oil (white muck). Pulled manifold - water...