Re: 1938 Super 8 1605 - adventures with a newbie
Posted by TxGoat On 2023/8/8 11:05:18
If you must have an electric fuel pump for priming or for backup or to clear vapor lock, connecting the electric pump's outlet to the fuel line between the stock pump and carburetor would be a good idea. The valves in the stock pump would prevent backflow and make it very unlikely that the electric pump could pump fuel into the crankcase.
A check valve added to the line on both sides of the electric pump would add further protection. Connect the inlet side of the electric pump to the fuel line between the tank and the stock pump.
This arrangement would put the electric pump in parallel with the stock pump, and the stock pump's valves and the two check valves into and out of the electric pump should prevent fuel from going the wrong way.
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