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    1978 Evin 70HP starts and runs great but after 10min or so bogs

    Just did a compression test, cold motor. 125, 90, 125 Will that 90 cause the symptoms of losing power after it warms up?
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    1978 Evin 70HP starts and runs great but after 10min or so bogs

    I wondered that. Is there any way to check it other than replace them one at a time?
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    1978 Evin 70HP starts and runs great but after 10min or so bogs

    Yup did it and horn sounded at control box
  4. B

    1978 Evin 70HP starts and runs great but after 10min or so bogs

    Ok I figured out how to test it. Unplugged the wire and grounded it and the horn at the control sounded.
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    1978 Evin 70HP starts and runs great but after 10min or so bogs

    How do you test it?
  6. B

    1978 Evin 70HP starts and runs great but after 10min or so bogs

    I’ll do a compression test. I don’t know if it has a horn or where it is. Water is shooting out the pee hole very strong
  7. B

    1978 Evin 70HP starts and runs great but after 10min or so bogs

    (I just searched thru the forums and didn't find answers) Just got this boat, put fresh fuel in, took it out, started pretty easily, sounded good, ran good at WOT but after about 10 minutes it bogs down and won't go past idle. Changed plugs, put new tank and fuel line and same result. The ball...
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