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    What do I need to run inboard out of boat

    hello I have posted tread about compression testing mercuiser 140 and finding low results 3681706 is the serial of engine with low compression I'ved taken valves apart and cleaned seats and valves hoping valves were letting compression by. Also ordered new head gasket ... again hoping this will...
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    compression.test

    I just compressed tested my engine and I receive various readings from 60 to 80 p s I mercruiser 140
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    backfire through carb

    I have a Merc cruiser 140 #3681706 and I'm getting back fire through my carb, I rebuild a carburetor , change the fuel pump change the spark plugs, and check the timing. I've determined I have a leak in my exhaust manifold which I sealed I sealed it to determine whether the leak was the problem...
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    temp of exaust

    Hello forum iam diagnosing trouble starting on a mercruiser 140 3681706 i am wondering what temp would the exaust manifold come up to at idle? There is a leak between the exhaust wall and cooling water wall wanna make sure this is my problem before ordering this pretty expensive part
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    shift sound

    First boat mercruiser 1970 engine serial # 3681706 140 mc1 am concerned with shift noise seems to"clunk" when Engaging in forword or reverse. Have not ran in water yet (only muffs) do you think this noise is normal? Am worried i over torqed cover ring when replacing bearing carrier/all seals in...
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    1976 merc shift trouble

    Hello Forum, I am working on a shift problem, I was able to move shiftshaft and pop into gear while replacing impellar.My cables are not froze and pulleys move, but will not transfer to shiftshaft. Wondering if this hydraulic cylinder above the pulleys has anything to do with shifting...
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