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  1. #1

    Cool How to change sparkplugs on 2002 Yamaha waverunner fx140 4 stroke

    Can anyone give me a quick guide on how to change the spark plugs? Plz

    My waverunner is starting up fine and when out of the water it sounds great. When I place the craft in the water, the RPM go high, but speed does about 3 MPH.. I'm thinking I need to replace spark plugs?? If anyone could help thanks..

  2. #2
    Tennessee's Avatar
    Join Date
    Dec 2005
    Mt. Juliet, Tn
    I would say its not the plugs. Look in your pump and see whats in there!

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