Merc 525 help???
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04-19-2009, 08:42 PM
#16
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Well today i put the boat in the water to test it out after changing the wires it sounded good on land went for a quick ride it ran good for about 15 min it was at 5400 rpm then the oil pushed out of the dipstick so i am thinking there is some blow by and that why its running like crap any input thanks.
04-20-2009, 11:34 AM
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Good luck is all I can say. My popping sound was stuck valves in head. I've stuck the exhaust valves in the heads for the third year in a row and am still under 200 hours on engines. NO ONE can find the culprit. I've now had the heads rebuilt by the third diff shop. Merc Racing has been no help. I originally had capt call exhaust and they blamed it on that. The last 2 years, I've had Merc original exhaust and still sticking. We've done it all to the heads - enlarged tolerances, etc. Hope your prob is not with the valves sticking cause IT SUCKS! BTW, if the popping sounds like it's thru the intake (like mine), it can be an indication the exhaust valve not opening properly to let out fired exhaust. And 5400 on RPM's, my rev limiter alarm goes off at about 5100.
