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1991 200 hp yamaha oilinjection pump not injecting

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  • 1991 200 hp yamaha oilinjection pump not injecting

    Both tank are staying full :-O is the crank driven pump rebuildable without pulling powerhead?

  • #2
    Anybody anyone how can I test the vro pump

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    • #3
      service manual should have a procedure for cleaning/testing check valves and lines and testing output of pump by measuring the CC output over a certain period of time

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