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  #1  
Unread 09-03-2013, 06:23 AM
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BuilderFL BuilderFL is offline
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Default 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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  #2  
Unread 09-03-2013, 06:28 AM
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Un-burned gas and oil in the exhaust.
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  #3  
Unread 09-03-2013, 06:41 AM
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drop the lower unit and see if you have an oily film on teh water pump housing, sounds like the lower crank seal is gone
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  #4  
Unread 09-04-2013, 07:51 PM
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find a diagram that shows the crank and the case halves, look at the very bottom, it has a seal carrier, just below the bottom bearing
item # 30 on this page http://www.butlermarineinc.com/fiche...r=0&fveh=50024

you may be able to drop the lower unit and inspect it with a light from the bottom end, spin the motor over while you have the lower off, you may be able to see crank case pressure bleeding by the seal
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  #5  
Unread 09-05-2013, 06:26 PM
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Thanks spare! I'll work on it tomorrow.
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  #6  
Unread 09-06-2013, 10:43 AM
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FLBuilder:

Do you use walmart/Penzoil TCW3 oil with decarb/cleaner additive by chance?

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