Re: IH Carb 6 cyl

Posted by Andy Martin on March 14, 2004 at 17:32:19 from (67.248.199.215):

In Reply to: IH Carb 6 cyl posted by ChadS on March 14, 2004 at 13:06:15:

Surprisingly enough, the old IH engineers did an excellent job of matching engine components to give a combination of power, durability, and economy. You usually sacrifice one of the above when you mix parts.

I assume you checked out the differential pressures in the idle circuit for your mixed components and that the top of the carburetor uses the same scheme as the M to provide the proper idle mixture. Or you added the right ports to get the air bleed to the main jet at idle.

I've always thought the M to have a sophisticated carburetor, what with it's air bleed through the main jet for idle fuel and using those air bubbles to act as an accelerator pump when the throttle plate snaps open, pressure in the venturi falls, and the bubbles expand forcing extra fuel into the venturi.

I am a mechanical engineer by degree but I'm not good enough engineer and don't have the test setups to mix carburetor parts.

While we're on the subject, what a big step IH made from the F series to the letter series in getting rid of the fuel pumps on the newer tractors.

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