Re: Farmall H 400 carburator adjustments

Posted by Wayne Swenson on June 14, 2004 at 19:55:02 from (66.191.69.10):

In Reply to: Farmall H 400 carburator adjustments posted by Lisa Haigler on June 14, 2004 at 05:59:26:

With the engine warm & running at wide open throttle (WOT), turn high speed mixture screw in until the engine begins to starve for fuel. Then turn the screw out until it begins to blubber. Now find the "sweet spot" in between the two settings. If you are working the engine (plowing, etc.), then the high speed screw needs to be turned out 1 turn or more to be sure the engine isn't running lean.
The same proceedure can be followed for idle mixture with the addition of the ldle stop screw to set the low speed RPM. On the "H" carb, the idle mixture screw is an air adjusting screw so turning in will richen the mixture and out will lean the mixture.
Go through this proceedure a couple times and if the carb is clean your fuel problems should be over.

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