M38A1 fuelpump

swampy · Post by **swampy** » Sat Oct 21, 2017 9:10 am

I think these fuelpumps are allergic to Ethanol gas, its that simple

4x4M38 · Post by **4x4M38** » Sat Oct 21, 2017 11:56 am

Its not just the pumps.

If the carb was rebuilt you should have newer gaskets and/or diaphragms
made for ethanol gas service. I believe Then and Now supplies compliant material in their kits.

That and sitting for long periods of time with ethanol gas drying in your systems way worse than the old days of regular leaded.

swampy · Post by **swampy** » Wed Oct 25, 2017 2:57 pm

bought a carb kit from John@ Midwest Military......hope it is ethanol tolerant

4x4M38 · Post by **4x4M38** » Wed Oct 25, 2017 5:40 pm

Should be. Give him a call.

4x4M38 · Post by **4x4M38** » Wed Oct 25, 2017 5:41 pm

Course these old guys like leaded gas also...

Post by **wesk** » Wed Oct 25, 2017 7:21 pm

The only components currently suffering from exposure to ethanol based fuels are the older rubber parts. Stick to the modern carb kits from Midwest Mil, AJP and RF Jeep Parts and the fuel pump modern kits from then and now and you won't have a problem with ethanol.

M38A1 fuelpump

M38A1 fuelpump

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