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Terry,OH · 06-07-2021, 06:31 AM

Use regular pump fuel 87 octane. no need for special fuels. Some guys like to add some MMO or Extend if necessary.
If you want to change the input valve change both pieces together, not just the needle. Before changing the input valve, tap the steel needle into the brass seat with a small hammer so the two seat properly.

It is possible the Carb. power valve diaphragm is ruptured, if so your engine oil will wind up with a lot of gas in it.

06-07-2021, 06:31 AM	#12
Terry,OH Senior Member Join Date: May 2010 Posts: 4,751	Re: Fuel problem on my '40 Use regular pump fuel 87 octane. no need for special fuels. Some guys like to add some MMO or Extend if necessary. If you want to change the input valve change both pieces together, not just the needle. Before changing the input valve, tap the steel needle into the brass seat with a small hammer so the two seat properly. It is possible the Carb. power valve diaphragm is ruptured, if so your engine oil will wind up with a lot of gas in it. Last edited by Terry,OH; 06-07-2021 at 06:38 AM.