Fuel pump problem after cam change 327/300

[Clem Z.]

Re: Only four culprits I can see Jeff

Re: Only four culprits I can see Jeff

Chuck & all

Turns out there was a fifth 'culprit'. I was out-smarted by a spider or some other critter that deposited a nasty silk egg sack of sorts in the hard line between the carb and the pump. It was porous enough to allow gas to seep by pushed by the head pressure created by the full fuel tank. It was not porous enough to let a slug of fuel-pump delivered gas by, however.

The line had been hanging on a pegboard in my garage since engine removal in January. I neglected to put a rubber plug in the ends or to bag it up like I did all other parts. During assembly I had fuel present at the carb end (head pressure source), so I never included this in my troubleshooting.

This morning as I was dis-assembling stuff to rig up some sort of pump rod stroke measuring device, I removed the hard line. It was wet with fuel, so with a finger over each end drained gas into a jar, walked to my compressor with the intention of blowing the line dry. After about 1-2 seconds of 60 psi -- SPLAT -- on the garage floor.

Returned line to the pump & tested via a couple of revs with the starter -- nice big fuel pulses issued.

Thanks to all -- glad there's not a bunch of bad cams out there.

mud dauber wasps,i had a 2 stroke powered water pump that would not start. i spent several days looking for the problem and it turned out to be a wasp nest in the exhaust muffler

[Chuck R.]

Re: Only four culprits I can see Jeff

Cool!

Ya gotta love nature!