Flathead Fuel Pump

[Lynn Eades]

Delivery pressure is dictated by the spring under the diaphragm. It will be the same and in the realms of 2.5 to 3.0 psi. Put a modern diaphragm in it to cope with the high aromatic modern fuel.

[Richard Farrant]

Originally Posted by Lynn Eades

Put a modern diaphragm in it to cope with the high aromatic modern fuel.

And be aware that a British AC pump has a different diaphragm spindle than a North American AC pump. Difference is the British one has two notches in the spindle where it fits to the lever where as a US one has a slot in the spindle so it hooks over the lever. I usually get a modern kit for a Land Rover Series 3 to get the correct diaphragm.

[m606paz]

I keep collecting fuel pumps. Another one found. Seems to be the best for my Flathead

[m606paz]

Another NOS part found is this #9369 pipe, but to long for CMP flathead. May be for UC?

20230212_100518.jpg

[Lynn Eades]

Interesting breather valve Mariano. I've not seen that before. There is usually just a hole. I wonder about its original application.

[m606paz]

Hi Lynn
I dont know original aplication.
Some have number stamped but hard to ID in this chart
http://www.restoringcornelius.com/fi...Spec_Chart.pdf

[Jacques Reed]

Originally Posted by m606paz

Another NOS part found is this #9369 pipe, but to long for CMP flathead. May be for UC?

Attachment 132811

Hi Mariano,

It could be for the PCV valve equipped engines that use a spectacle plate below the carburettor to draw the crankcase fumes into the manifold.

The plate is about 1/4" thick so it raises the carburettor thereby increasing the length between the fuel pump and the carburettor.

Firsthand experience- I bent up one wrong length fuel line before I realised this!

Cheers,

[maple_leaf_eh]

Hand priming is a necessity in Canadian conditions. Batteries that don't have a lot of cold cranking amps, trying to turn over reluctant engines, always need a little liquid help. I used them in M38A1 and M37 series trucks in service, and was grateful they worked.

[m606paz]

Hi Jacques, thanks for your help.
My 5G-###-F late flathead have the PCV behind Carb.. the spectacle plate...lack.