09-12-2010, 07:03 PM
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10mm MW
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Join Date: Sep 2008
Location: Michigan
Posts: 767
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Quote:
Originally Posted by funola
I am chasing down an air leak and I think the source of it is the primer pump. It is the upgraded black body pump I put in 2 years ago but I think it's junk being $10. I want to eliminate it altogether and just use a mighty vac to prime when needed. The primer pump sucks anyway because you have to pump it 150 times for it to do anything and that is ridiculous. Do I just plug the hole up vacated by the primer pump? Has anyone done that?
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I am going to remove mine for the same reason. I will be adding a electric boost pump back at the tank to raise the primary fuel pressure and help feed the lift pump.
I considered putting a ball valve between the primer and the lift pump to isolate the primer, but that would be bulky and not at all sightly.
I am going to make a plug that screws in the primer hole and extends down into the piston return spring cavity because I do not want air to be trapped in the top the threaded primer cavity. I have an old lift pump to design from and need to refresh my recollection of what it should look like, but I think if you just screw a regular plug in the threads, you will get air trapped under the plug.
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