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    HELP !! 200 Mariner super magnum EFI racing motor.........Surging...Ser#OD935025

    This motor surges on the lake has full power then loses power, off and on. So, compression is good 125# to 130# spark good on sparkie. Fuel pressure 36 lbs. while running in the lake on the trailor. Changed spark plugs and screw on fuel filter. Ran on flusher hose. When pulling plug wires while...
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    test

    tests
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    60 hp 3 cylinder 2 carbs HELP

    This early 70's Mercury motor has good compression 150, 145 and 145 also has good spark to all 3 cylinders. will run and idle but is not running on the middle cylinder. I pull the middle plug wire and it has no effect. Pull either of the others or both at the same time it will die. I think it...
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    test

    testing testing
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    Ethanol Fuel

    New to this board. I am a long time all around mechanic, certified from the school of hard knocks. Also from buying broken down junk and turning it into somthing of value. My question and concern is, now that it looks like we are going to get Ethanol rammed up our keisters like it or not. Are...
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