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1990 yamaha waverunner 650

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  • 1990 yamaha waverunner 650

    My 1990 wave runner lacks power is hard to start and wont reach high rpm, cylinder compression is @ 130 psi and i put a carb kit in it if you back off on the throttle it picks up a bit and is less slugish idles fine any ideas ??

    Thanks
    Moe

  • #2
    Recheck carb, sounds like running too rich at high speed.
    Regards
    Boats.net
    Yamaha Outboard Parts

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    • #3
      OK thanks but not sure wich is high speed jet and wich way to turn ( in or out ) for leaner mix i reset jets to original settings all were set at the usual turn - turn and half within a qurter turn could fuel pump be a problem? also hard to start
      Thanks
      Moe
      Last edited by mauro romano; 08-06-2012, 03:50 PM.

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      • #4
        If know where they were put them back to original setting, fuel pump or carb assembled wrong could cause it.
        Regards
        Boats.net
        Yamaha Outboard Parts

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