Posted by mkirsch on August 27, 2014 at 04:51:44 from (72.45.143.81):
In Reply to: IH 140 tractor posted by Bill Cox 4444 on August 26, 2014 at 04:59:21:
There could be any combination of a dozen things wrong with the tractor that it won't rev up.
First and simplest, follow the rod from the "throttle lever" up to the front of the engine on the right side. Either move the "throttle lever" yourself or have a helper move it, while the engine is NOT running. Where it connects in the front is called the GOVERNOR. That is what controls how fast the engine runs. You set the governor, the governor sets the actual throttle on the carburetor.
If the rod is not secured properly along the way it can flex, and keep the engine from revving up.
Make sure the lever that the rod connects to moves freely. If not you will need to lube it and work it back and forth until it moves freely.
Also do the same with the shaft that comes back out of the governor, runs across the front of the engine, and connects by a second short rod to the carburetor. Make sure it all moves freely and easily. If not, lube and work until it does.
This trick of starting at a known point, and following a rod/shaft/wire to its other end is known as "tracing" and is an invaluable tool in learning about your tractor, as well as troubleshooting problems.
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