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    2003 bigfoot 50hp 4stroke efi need to pump bulb at high rpm to keep running

    Hi Having a problem with lose of fuel at high rpm. If I pump the primer bult it will run fine. I had a issue with the mech fuel pump failing and sending rubber into the high pressure fuel injection. Getting stuck in the float valve seat. I have changed the following parts. 1: both fuel filter...
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    Low fuel pressure on EFI Bigfoot 50hp

    2003 bigfoot 50hp EFI just checked fuel pressure and it is only 20psi it should be 42-44 psi. Any idea if I should replace the pump or pressure regulator or the whole unit. Thanks Scott
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    50 hp Bigfoot 2003 runs rough when warm.

    I have a 2003 50 hp bigfoot that will run great when you first start it, but once it warms up it will not run. It will spudder and run very rough. At full throttle it will barely idle. Once it cools down again it will run great. I have replaced the following parts: 1: Low pressure fuel pump 2...
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    how to purge EFI fuel system

    HI I have a 50hp Bigfoot 2003 EFI how do I purge the high pressure side of the EFI system? Thanks Scott
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    2003 mercury bigfoot 50hp surging

    Hi all, I need help with my 2003 bigfoot. the engine was running great until I put new gas in from my gas jugs. The engine will run for a couple minutes then starts surgeing at low RPM. The throttle will still be full open, but the engine goes from idle to @ 1/2 full. It seem to be lacking...
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