Grey foamy substance out of propeller exhaust
Lots of grey foamy substance along with water is coming out of my propeller exhaust.
Had a failed water pump and motor overheated getting back to the marina. I replaced the water pump and the head gaskets and now the motor runs very rough and dies in idle. Compression checked on all cylinders between 108 – 115 psi. 1988 Mercury 200hp.
Any idea of what this could be?
Thanks!
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