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Johnson GT 150 V6, 1989 - RPM Issues

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  • Johnson GT 150 V6, 1989 - RPM Issues

    I have a 1989 Ranger 375V with a Johnson GT 150 Outboard. When i first launch the boat, it starts and runs like a champ until.... i shut it down to fish. Once I shut it down, upon restarting it does not have enough power to get the boat up on plane. For the rest of the day, it runs on a fast idle but will not get the boat up on plane. I have change the fuel line, fuel filter, spark plugs, and the boat is full of clean gas, and oil. Local dealer told me that he could not find anything wrong with the boat, but when he tested it, he never shut it down.

    Compression numbers are port (90, 100, 100) and starboard (85, 85, 85) although I am not 100% confident in the dealer who checked these. Any feedback would be appreciated!

  • #2
    My 99 gt200 does the same thing. Any resolution yet?

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