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  1. #16
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    Quote Originally Posted by rhardwick View Post
    Is this a Mercury fuel pump or aftermarket? I would only trust a Mercury fuel pump.
    The zero pressure was on a brand new non-merc fuel pump. So sounds like you're right to trust only the Mercury one.

    So the test at the lake proved that the rebuilt Mercury pump had corrected a problem. It ran fine on the external tank at all speeds and sustained it.

    When I hooked it up to the internal tank it failed again. So obviously there is still a problem with that system somewhere. I started with replacing the ball and immediately adjacent lines. Recently I had already replaced the pickup tube in the tank and the anti-siphon valve. This all seemed to pump by hand OK, but several locals are telling me to remove the anti-siphon valve entirely... even though it may be brand new they are bad news.

    Anyone else have an opinion about anti-siphon valves?

  2. #17
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    Unless your motor is lower than the fuel tank remove it.

    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

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