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mike42 · 07-29-2021, 11:10 AM

Vee ……. When it was cold it ran okay but as it warmed up it started to stumble or buck a bit like it wasn’t getting fuel. I never thought to check the reg psi. I started it up Tuesday morning and happened to look at the reg and is was almost flat ! I loosened the nut and adjust to 2.9 prox and took it out. No more stumbling.

Rock …… I bought a new USA made carb from Dennis carpenter and didn’t touch a thing. It started right up and ran good until it started to stumble. Then I found the reg was set too low. I never touch the screws other than idle adjustments.

Thx……..Mike

07-29-2021, 11:10 AM	#12
mike42 Senior Member Join Date: Jun 2012 Location: Gaylord, Michigan Posts: 1,606	Re: ‘40 starting to stumble a bit……… Vee ……. When it was cold it ran okay but as it warmed up it started to stumble or buck a bit like it wasn’t getting fuel. I never thought to check the reg psi. I started it up Tuesday morning and happened to look at the reg and is was almost flat ! I loosened the nut and adjust to 2.9 prox and took it out. No more stumbling. Rock …… I bought a new USA made carb from Dennis carpenter and didn’t touch a thing. It started right up and ran good until it started to stumble. Then I found the reg was set too low. I never touch the screws other than idle adjustments. Thx……..Mike