Governor/carb question

[rrbgtt]

I recently stumbled on a ‘45 or ‘46 Allis Chalmers Speed Patrol and bought it.

The previous owner removed the governor linkage rod to the carb and installed a throttle cable bypassing the governor.

it appears he also installed an aftermarket lever on the carb.

I found sn adjustable rod, removed the throttle cable and hooked the governor up.

Setting the rod length and carb at full throttle gave me virtually no throttle. I began lengthening the rod and have gotten it to the point where the governor works in, what I am guessing to be, the mid range rpm’s only.

I suspect the lever added to the carb is the incorrect length and is preventing me from getting the full rpms because the length from idle to full throttle is not the same length as the governor action.

Can anybody here give me the length on the carb lever from center of governor rod to center of carb shaft?

 

[DrAllis]

The variable speed engine control lever for the governor is located on the right side of the engine. It is right next to and ahead of the oil fill cap. A linkage rod should be connected to it and running back to the steering wheel area to the throttle lever. As far as the other side of the engine goes, there is no specific length for the governor to carburetor link rod. It is a little different from one engine to another. To adjust it properly, the vertical governor arm should be pulled rearward by a spring inside the governor. With the vertical governor arm fully to the rear, force the carb link rod to the rear so the carb it full open. Now, make the length so it just slips into the hole on the vertical governor arm. This setting is correct and will immediately allow the engine to go to full speed when started. SO, the add-on cable control must have been used to somehow slow the speed down ?? The right side of the engine is where speed it designed to be controlled. Good luck, because you've had some knucklehead change things around to something it shouldn't be.

 

[rrbgtt]

The variable speed engine control lever for the governor is located on the right side of the engine. It is right next to and ahead of the oil fill cap. A linkage rod should be connected to it and running back to the steering wheel area to the throttle lever. As far as the other side of the engine goes, there is no specific length for the governor to carburetor link rod. It is a little different from one engine to another. To adjust it properly, the vertical governor arm should be pulled rearward by a spring inside the governor. With the vertical governor arm fully to the rear, force the carb link rod to the rear so the carb it full open. Now, make the length so it just slips into the hole on the vertical governor arm. This setting is correct and will immediately allow the engine to go to full speed when started. SO, the add-on cable control must have been used to somehow slow the speed down ?? The right side of the engine is where speed it designed to be controlled. Good luck, because you've had some knucklehead change things around to something it shouldn't be.

Thanks. Everything was there except for the governor to carb rod. Setting it up at full throttle didn’t work. I am guessing it is because the length of the carb lever isn’t correct, but can find nothing to give me the correct length. The length of the lever obviously changes the distance the governor rod must travel to operate the carb from idle to wide open.

Hoping someone here can give me that length so I can at least get this suspected problem out of my head.

 

[rrbgtt]

I got lucky and figured out my problem.

I noticed, looking at pictures on line, that the spring I assumed was a throttle return spring was in no picture. It went from a water drain petcock to the throttle position arm.

I removed it, reset the linkage arm and the governor works great!

 

[jdeere562]

I believe the spring from the petcock should hook to the choke arm, not the throttle.