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2000 Yamaha 115 Outboard motor Shakes and runs at half power.

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  • 2000 Yamaha 115 Outboard motor Shakes and runs at half power.

    Took the boat out the other day, let it warm up (idled fine) but when I had the throttle down it shook and had about half the power when fully throttled. There is a jet prop on it. Could a spark plug or water in the tank be the problem? Wanting to get this fixed or troubleshoot it before winter. Any suggestions would be great, Ty!

  • #2
    Did you check your under cowl fuel filter for crap / water? If you have a transom mount filter, do the same..

    There's no model # posted for this engine so I don't know if its carbed or FI'ed to check for water in the VST or carbs...
    Scott
    1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXR

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    • #3
      Not familiar with jet drives. Can they inhale junk? Line etc?

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      • #4
        FYI:

        http://www.boats.net/parts/search/Ya...500/parts.html
        Last edited by TownsendsFJR1300; 10-12-2016, 07:46 PM.
        Scott
        1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXR

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        • #5
          Would be nice to start with a model number.

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          • #6
            Sorry the Yamaha is a 115tlry

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            • #7
              Anybody have any advice for this guy? Curious about this one.

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              • #8
                first off.
                test the alarm horn.
                jets have an odd habit of packing the cooling system with sand.
                typically cause folks do not realize it sucks anytime the motor is running and the cooling water pump gets it water from the jet impeller.

                the only other odd things jets with steel muffler tubes did was corrode a hole at the base of the tube and allow jet water flow to clog the exhaust with water.
                this typically shows up as a loss of power yet everything else works.

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