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#1
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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
09-03-2013, 06:28 AM
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Un-burned gas and oil in the exhaust.
__________________
Heavily medicated for your protection.
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#3
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
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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#6
09-06-2013, 10:43 AM
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FLBuilder:
Do you use walmart/Penzoil TCW3 oil with decarb/cleaner additive by chance? Kamikaze
__________________
 74 V20 CC with a 150 Johnson (Gone but not forgotten) 89 V20 Cutty with a Tower (Build in process)
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