Posted by Allan In NE on October 10, 2010 at 05:54:28 from (148.66.88.254):
In Reply to: IH 1600 grain truck posted by GeneMO on October 10, 2010 at 05:10:45:
The carb throttle/governor assembly works exactly 'backwards' from the way you'd think.
The way that thing works is that spring pressure always tries to pull the throttle plate wide open.
Then, when cranking and/or running, engine vacuum (via carb internal passage) then forces 'er back towards the closed position and the idle stop by the use of the governor vacuum diaphram.
Has someone just worked on this carb or had the carb off?
Is the diaphram hooked up, is it leaking or is the linkage on correctly? How about the two carb throttle return springs (one inside the other)?
The little spring/linkage inside the "box" on the side of the carb okay and installed correctly? Has the diaphram arm to the throttle shaft on the shaft link come off?
Is that little "arm" on the end of the throttle shaft pointed in the right direction? If on backwards, the diaphram will assist the springs to "open" the throttle shaft.
I'm going by memory here, but hope I've kinda led you in the right direction.
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