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Thread: Fuel pump prime...351 H/M?

  1. #1
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    Fuel pump prime...351 H/M?

    I took the original fuel pump and filter combo off my 1970 351 H/M and cleaned it out....it had been sitting for 10 years....pump diaphragm looked good....

    I reinstalled it and can't get it to prime. I took it off again and again to see if I had the arm positioned correctly?.....it mounts with some tension.

    With the pump in my hand I can get it to squirt fuel by moving the arm. I used a hand pump to get some fuel moving....

    Anyway....after much cranking....still nothing. Can these pumps be a "bear" to prime?....

    Thanks!

    -Aaron
    1974 Magnum 27 Sport
    1970 Donzi 18 2+3

  2. #2
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    Usually they pick up fuel pretty quick. Is the cam turning ?

  3. #3
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    Or use a vacuum gauge on the inlet side and a pressure gauge on the outlet.

  4. #4
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    It sounds like it has compression...sounds normal. Maybe I'll pull the pump and make sure the fuel pump cam is turning...?

    Anyone know of a rebuild kit for this original style pump?
    1974 Magnum 27 Sport
    1970 Donzi 18 2+3

  5. #5
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    Kits are no longer available Coast Guard Regs!
    No matter what your beliefs are "GOD BLESS AMERICA"

    Fully retired marine tech near 60 years in the biz.

  6. #6
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    Go electric, it's so easy to do.
    Go with a Holley compatible w/ethanol and a Holley safety switch.
    George Carter
    Central Florida
    gcarter763@aol.com
    http://kineticocentralfl.com/


    “If you have to argue your science by using fraud, your science is not valid"
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  7. #7
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    Kits are readily available

  8. #8
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    Sometimes if I let mine sit for a while, I have to give the old girl some help... a squirt of gas in the carb and fire it up. That primes everything and I'm good for the season.

    Fo a rebuild kit, look for the grayhaired guy at your local auto parts store. Flop it up on the counter... he'll know the kit...
    1970 18 2+3 Hull #18-355 H/M 351W Volvo 250
    07 Cayman IT IS BACK! - '13 Abarth Cabrio

    PRESERVE, DON'T RESTORE

  9. #9
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    my 351 had a screw off canister that held the filter is this the same setup??

    when i changed my filter if I didn't fill the canister with fuel when i put it back on I had issues
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