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Old 06-12-2005, 05:00 PM
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Default Need help please look at pictures

I took the boat out yesterday to find both flame arrestors and breathers were caked full of that milky white stuff the motors seem to run perfect though. The compression on one motor idle is a 2 or 5 pounds of pressure after running for a long time after I put it up on plane it goes up. I just looked at the oil on both dipsticks and the oil looks perfect. I also just changed the oil and filters in the boat before the run I put the new mobil 1 15w-50 and mercury racing filters. The motors are 1996 450hp's mercs. Please anybody call me if you have any ideas or post them I hope I didn't nuke both motors!!!!
Jason 1-608-449-4992
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Old 06-12-2005, 05:04 PM
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Default Re: Need help please look at pictures

Since the oil on your dipsticks is NOT milkshaked you should be in great shape. What you are seeing is condensate. You probably should install a vented breather cap system to eliminate the condensate build up.
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Old 06-12-2005, 05:12 PM
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Default Re: Need help please look at pictures

I have a vent breather on every valve cover it was worse than the picture shows believe me!! This is a picture when i run my finger on the inside of the valve cover
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Old 06-12-2005, 05:13 PM
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Default Re: Need help please look at pictures

Sorry wrong picture this is it!!!!!!
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Old 06-12-2005, 05:30 PM
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Default Re: Need help please look at pictures

Need To Get The Oil Hotter , To Big Of A Cooler Will Cause That.but It Should Not Cause That Big Of A Problem.
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Old 06-12-2005, 05:59 PM
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Default Re: Need help please look at pictures

do you run a thermostat or crossover?
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Old 06-12-2005, 06:42 PM
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Default Re: Need help please look at pictures

Thermostat it calls for a 143 and thats whats in them. I was running between 140 and 150 oil coolers at 200 to 230 This problem only started a week ago and thats when I tried that new 15w-50 mobil one
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Old 06-12-2005, 06:46 PM
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Default Re: Need help please look at pictures

Oil thermostat keeps the oil at 200-230 degrees. Burns off the condesation above 212 degrees.
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Old 06-12-2005, 09:32 PM
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Default Re: Need help please look at pictures

Pulled all four breathers off and cleaned them they were plum full of that goop. What is so weird to me is that it's both motors at the same time doing the same thing!!! Also drained oil and replace with just 20w-50 oil and cheap fram filter and runs fine oil pressure is better than mobil 1 no water on dipsticks still goop from valve covers and breathers!!! What do you guys think????
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Old 06-12-2005, 09:52 PM
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Default Re: Need help please look at pictures

might have taken in some water through your pipes... same thing happened to me last week... flushed it out and its fine now... stecz
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