Fuel Pump - Will it pull?
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Instructor
Joined: Aug 2021
Posts: 219
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From: Los Angeles
Fuel Pump - Will it pull?
I have a base 71 350 that has been sitting a while. I’m pretty sure the fuel lines are empty from the carb to the tank. If I put gas in the tank, will the pump pull it all the way to the carb? Does the system need to be “primed?”
(Tank is new, so it’s been completely empty for months.)
(Tank is new, so it’s been completely empty for months.)
Just another Corvette guy
Joined: Feb 1999
Posts: 8,518
Likes: 3,865
From: Palm Springs, CA.
The original style mechanical pump is a good puller. You should not have to prime but it wouldn't hurt to fill the carb so you don't have to go through an extended cranking period.
Cheer, Greg
Cheer, Greg
100 percent.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Brand new tank, zero crud, that's excellent.
I think I would put a few gallons in the tank. Try to jack-up the rear a tad.
Then disconnect to feed line at the pump, from the tank just long enough to get some flow into a bucket, reattach.
I would not allow the pumps diaphragm to operate dry very long. So yes, basically prime it.
I think I would put a few gallons in the tank. Try to jack-up the rear a tad.
Then disconnect to feed line at the pump, from the tank just long enough to get some flow into a bucket, reattach.
I would not allow the pumps diaphragm to operate dry very long. So yes, basically prime it.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Brand new tank, zero crud, that's excellent.
I think I would put a few gallons in the tank. Try to jack-up the rear a tad.
Then disconnect the feed line at the pump from the tank, just long enough to get some flow into a bucket, quickly reattach.
I would not allow the pumps diaphragm to operate dry very long. So yes, basically prime it.
You may get some syphoning from the tank, may not. Try it.
I think I would put a few gallons in the tank. Try to jack-up the rear a tad.
Then disconnect the feed line at the pump from the tank, just long enough to get some flow into a bucket, quickly reattach.
I would not allow the pumps diaphragm to operate dry very long. So yes, basically prime it.
You may get some syphoning from the tank, may not. Try it.
Last edited by HeadsU.P.; Mar 12, 2024 at 03:36 PM.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
On the ground and level with a half tank of gas....pulling the supply line will yield a steady stream of fuel. If it doesn't, then you have a blockage (bad sock, collapsed hose at the sender, etc...).
Jebby
Jebby
