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2000 Yamaha 150ox66

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  • 2000 Yamaha 150ox66

    Recently I changed the low pressure fuel pumps on this motor and it has run great, but when I trottle down or idle it drops to 4-5k on the Tach and is going dead. It cranks right back. What can I check outside of adjusting the idle itself?

  • #2
    no idle adjustment on that engine.
    it either runs correctly or its broke.
    could be bad plugs, plug caps, clogged injector filter/filters.
    clogged pressure regulator filter, engine will run to high on the fuel rail pressure and cause an over rich mixture.

    could be a bunch, but leave the shutter screw alone.

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    • #3
      Thanks for the tips. I have changed the plugs recently. Is there a manual oline that can show me all the filters that you spoke of?

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