View Full Version : Fuel pump prime...351 H/M?

07-24-2010, 03:06 PM
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?....



07-24-2010, 04:37 PM
Usually they pick up fuel pretty quick. Is the cam turning ?

07-24-2010, 04:39 PM
Or use a vacuum gauge on the inlet side and a pressure gauge on the outlet.

07-24-2010, 05:22 PM
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?

07-24-2010, 06:10 PM
Kits are no longer available Coast Guard Regs!

07-24-2010, 06:53 PM
Go electric, it's so easy to do.
Go with a Holley compatible w/ethanol and a Holley safety switch.

07-24-2010, 11:05 PM
Kits are readily available

07-24-2010, 11:18 PM
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...

07-25-2010, 09:58 AM
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