We’ve all had to replace our fuel pumps at one point or another. The aftermarket stuff works fine; well usually… One thing I’ve noticed is having to deal with high fuel pressure. This plagued my ’67 for years because I did not understand how to fix it. Aftermarket pumps are known for delivering too much pressure if not properly adjusted. This will give you the commonly known “hard start issue.” Rob and Dave’s Aircooled Volkswagen site has everything properly documented on how to replace, check, adjust, etc. Remember, the KEY is 2.8 — 3 lbs!
One thing I must mention:
“WARNING: Gasoline is extremely flammable, so take extra precautions when you work on any part of the fuel system. Don’t smoke or allow open flames or bare light bulbs near the work area, and don’t work in a garage where a natural gas-type appliance (such as a water heater or clothes dryer) with a pilot light is present. If you spill any fuel on your skin, rinse it off immediately with soap and water. When you perform any kind of work on the fuel tank, wear safety glasses and have a Class B type fire extinguisher on hand.”
If you can find it, I recommend buying a rebuilt German Pierburg dual diaphragm fuel pump. Ed Fall of Vintage Werks stocks them from time to time. Also, Mark Massey of Old VWs is a fantastic and very knowledgeable resource.
Here’s a short (low quality) video after I installed a German Pierburg dual diaphragm fuel pump. Remember. 2.8 — 3 lbs of pressure and you’re in good shape! This pump hit the perfect mark with no adjustments needed. Lastly, make sure to have the right pushrod installed.
Keep it German!