1971 Body/Chassis FSM

1971-74 F Engine FSM

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Fuel Pump Renewal

Old dirty pump

Fig. 1

Ready to remove

Pump removed

Fig. 2

Pump Removed

Top plate removed

Fig. 3

Top Valve Body Plate Removed


While stripping the engine of parts so I could clean and paint the block, I decided to see what was inside the fuel pump.  This is an original 1971 pump so I expected it to be corroded and full of junk. First thing I discovered was that the main spring on the lever that engages the cam was broken! But the pump still worked... Hmmmm.... I'm sure the dealer will have that in stock....

Ok so continuing on with the dismantling, I pulled the 7 phillips screws out of the top valve body cover, and carefully removed the thin gasket. See Fig. 3. This exposed the pump valves. They were pretty clean with no junk around them. I guess the PO's actually changed fuel filters pretty often!  See Fig. 4 and 5.

Fig. 4

Valve Body Bottom

Fig. 5

Valve Body Top


Fig. 6



Fig. 7



Fig. 8

Diaphram Top

Fig. 9

Diaphram Bottom


Fig. 6-7 shows the other 8 screws removed and the valve body separated from the lower pump body with the diaphram. The diaphram looked good with no cracks and little junk on it. See Fig. 8-9. The lower pump body was dirty so I cleaned it up with soap and water then put it in my powder coat oven at 500 degrees for 30 minutes to burn all the oil out and make it easier to finish cleaning.

Using a Dremel tool with a wire brush I cleaned up the top cover, the valve body and the lower pump body. I then used some polishing compound on them to brighten them up a bit. Well, since they are so shiny, how about a coat of translucent red on the polished top and bottom pieces to dress them up a bit, and a coat of clear on the valve body since I can't bake it due to the valves?  Too much glam for the old F engine? Hell no!

Fig. 10

Fig. 11


See Fig. 10-11 for the coated parts.



I then cleaned up the diaphram and closely inspected it for cracks top and bottom. It looked good so I started putting it back together.

Fig. 12

Diaphram Installed

Fig. 13

Glam on!


Sometime back a fellow Mud member sent me a fuel pump that was bad, but it had a good pump lever spring. Though it was a different brand, the spring did fit with a bit of persuasion! One note about putting the pump diaphram back in , IT'S A PAIN IN THE ASS!!! That spring is big and hard to compress while lining up 8 holes and keeping the diaphram tang engaged in the pump lever arm. See Fig. 12.

See Fig. 13 for the reassembled unit... Sweet!

BTW there used to be a fuel pump rebuild kit out there for these pumps but I think it has been discontinued. :(

Related Links

Tank Repair

Marine Fuel Filter

Making New Fuel Lines





1971 Body/Chassis FSM

1971-74 F Engine FSM

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