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  1. #1

    Default 1996 Johnson 90HP Model J90TLEDA

    Engine starts and idles great. Give it WOT goes for about 200 feet and bogs down like it is running out of fuel. I have rebuilt the Vro, Put a new powerpack in it, New coils, New plugs and wires, and rebuilt the carbs. Just can't figgure this one out. Any ideas? Thanks.

  2. #2
    Join Date
    Sep 2010
    Posts
    19,802

    Default Re: 1996 Johnson 90HP Model J90TLEDA

    The first step in trouble shooting that motor is a compression test.----Post your numbers.

  3. #3

    Default Re: 1996 Johnson 90HP Model J90TLEDA

    Engine runs fine gets right up on plane. Plenty of power. Something is shutting it down or it is running out of fuel.

  4. #4
    Join Date
    Sep 2010
    Posts
    19,802

    Default Re: 1996 Johnson 90HP Model J90TLEDA

    Good luck with your motor.----Maybe try a new stator and trigger / sensor / timer base.------You may get lucky.-----Trouble shooting / testing is a lot cheaper than spending $1000 on parts like a blind squirrel.

  5. #5

    Default Re: 1996 Johnson 90HP Model J90TLEDA

    ya ok. go check your compression.

  6. #6

    Default Re: 1996 Johnson 90HP Model J90TLEDA

    Any other ideas beside the compression tester?

  7. #7

    Default Re: 1996 Johnson 90HP Model J90TLEDA

    Quote Originally Posted by ffej3580 View Post
    Any other ideas beside the compression tester?
    What is your fuel pump pressure?

  8. #8

    Default Re: 1996 Johnson 90HP Model J90TLEDA

    Could it be warped carb bowls, or had they gone to metal by then? The plastic ones will definitely warp. It won't show a gas leak, but it will let air get in when the fuel pump is pulling fuel.

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