DD 8V71 prime pump

[bevans6]

ideally you would put a lift pump inside the tank, but that ain't gonna happen any time soon... 

I think that if the pump, which is for priming only, can draw suction from the tank, that's enough and all it has to do.  If I were designing a permanent, full time pump solution it surely is not what I would use.  You are right, it's nice to have a pump push instead of pull, but the mechanical pump, which isn't a particularly modern design, pulls from the tank no problem.  We'll see what it does when I try to fire it up.  I'm more worried about vibration than head on mine, I can always move it somewhere else or put a heat shield on.  I was thinking of not mounting it at all, just letting it hang from the line.  I have a pump in one of the race cars that has just been hung on the hose for 8 years now, it seems happy as pie!  That steel braid lined -8 hose is bloody tough to bend in tight turns!

Brian

[papatony]

 The 80's and 90's Cats had a hand pump built into the filter. They work great and don't outside power

[belfert]

The 80's and 90's Cats had a hand pump built into the filter. They work great and don't outside power

The Racor fuel filter housing on my bus has a built-in primer bulb.

[gus]

I think the original mechanical pump is much more powerful than the generic electric auto supply store types. Every one I ever had said to mount low and near the tank, they do push much better than they pull and this usually results in better priming.