Zenith Carb Adjustment

Rick Jones · Mar 11, 2009

Hello All,

I have a Ford 640 that I had to replace the carb. I replaced it with a Zenith and it had been working fine. Recently it has been running rough so I decided to take the carb off and give it a good cleaning. Not thinking I removed the idle screw without checking how many turns out it was. Can anybody tell me how many that"s supposed to be? I"m thinking 1 1/2 to 1 1/4 turns out from the bottom but was hoping somebody that"s had Zenith carbs would know what is best.

Thanks

Rick

Bob · Mar 11, 2009

There's NO "one size fits all" BEST setting, and each carb/engine is s little different.

Start @ 1-1/2 turns, then set it for the best SLOW idle after it's warmed up.

From that point, you MAY have to tweak it a BIT richer to get throttle response up from slow idle.

rustyfarmall · Mar 11, 2009

For some reason I'm thinking that 1/2 turn out is the initial setting.

Rick Jones · Mar 11, 2009

Thanks Bob I"ll give it a shot.

Rick

Zenith Carb Adjustment

Rick Jones

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Bob

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rustyfarmall

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Rick Jones

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