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1991 150ProV surging

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  • 1991 150ProV surging

    I made a trip a couple of weeks ago and for the 15 minute ride out to where we fish, my 150 ProV ran great. But about 5 hours later on the ride back it began surging. After getting home I added some Seafoam and ran the motor for about 15 minutes. Then I made another trip yesterday and the same thing happened - ran great on the way out, but began surging on the way in.
    The plugs are less than a year old. I have a serviceable fuel filter which I removed today and found a small amount of very small black specs - don't know if that would explain the problems. Any help or guidance is appreciated.

  • #2
    Check fuel pressure/vacuum with gauge.
    could be bad pump, sucking air, restriction in lines,etc.

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    • #3
      clean / rebuild carbs

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