2002 Johnson 90 hp, carb, impeller
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2002 Johnson 90 hp, carb, impeller

  1. #1
    Senior Member SBjet's Avatar
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    Dec 2007
    Vero Beach, FL

    Default 2002 Johnson 90 hp, carb, impeller

    Rough idle, low rpm at idle, warm up lever has little effect. What is the procedure for cleaning out the carb, I assume there is some low idle pickup tube that needs to be cleaned.

    Also what is the procedure for changing the impeller? And a good place to get parts? Thanks.
    Last edited by SBjet; 05-24-2011 at 09:24 AM.
    Quote Originally Posted by Tom Brown View Post
    I'm still chuckling at being "poo-pooed" for straying off topic. Awesome.

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  3. #2
    Platinum Member BigSteve's Avatar
    Join Date
    Feb 2008
    Close to the water...


    I would look for your local dealer for OEM parts and a service book

    The water pump is in the lower unit, a few bolts and its off and its located on the vertical shaft. check the housing for wear if ok replace the impeller and change the gearcase oil

    As for the carbs you will have to remove them and make sure all the the little metering jets and air bleeds are in good shape free from crap and water

    Be sure and change the fuel/water seperator

    Most dealers do a lot of service on this size engine for the fisherman and are very good

    Best of luck
    If you ain't the lead dog the view is always the same !

  4. #3
    Junior Member
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    Jun 2011


    I differ a bit as the aftermarket parts seem fine to me (of course since I sell them but seriously). Most outboard parts are manufactured in other countries and it doesn't make any difference with some. I would agree that some OEM may be better but for the most part they are all made from the same countries supplying the same quality. If you do clean the carb(s) your self don't use a carb soak of any kind only using spray cleaner. They are fairly easy to do as long as you're use to working on stuff and pay attention to detail. As far as a low or high speed pick up they do have different jets for those but if any are clogged then the entire carb should be gone through and cleaned. Either way rock on!

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