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I have a boat that has a 90 hp johnson outboard on it and when the previous owner had it the oil injection went out so now you have to mix gas. i took it out yesterday and it doesn't want to idle and it doesnt like low rpms it does great in high rpms. also when you shut it off and start it you have to rev it a while before you can get it into drive wwithout it dying. he said one of the rings might be bad or something from the oil injection going out. would this be my problem like could oil/gas be getting where it shouldnt be?

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Ok.Get a compression test done.That will solve the rings debate.If you premix the fuel,it has to be at 50/1.If the comp test is within 10% of each cyl,all should be ok.Hope this helps

Posted on May 20, 2011

  • caleb swenson May 23, 2011

    50/1 is what i run i was wondering if i ran some seafoam in the fuel if that might help clean it out and run better since it sat for two years outside in MN without being winterized or anything.

  • thomasnee May 23, 2011

    The carby's may need a good clean and throw in a new set of spark plugs.Get the water pump done.When they have sat for that long it WILL need it.Better than cooking the motor.



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