governor

(quoted from post at 14:24:47 09/01/13) Those add on governors had their own little oil reservoir, so they needed to be maintained separately from the engine crankcase, which was a challenge for some people, if you know what I mean!
Pulleys need to be sized correctly to get the right speeds.
Basically the way any governor works is- as you open the "throttle", it puts more tension on a spring, attempting to open the actual throttle plate in the carb. through the governor. Then as the engine speeds up, weights in the governor exert more "fight" against the spring, stabilizing engine speed. It's a balancing act. Allowing the engine to maintain an even speed, and to respond to varying load conditions.
One simple thing to check and is also pretty standard to most governors- is the gov. control arm and the throttle arm on the carb. should be wide open, or nearly so, at the same time.
When properly installed, maintained (oil, belt, tension, etc.) they work fine.
Went out on a service call once with the New Idea service rep. on a Uni with the GMC V6. Owner had installed a new governor, but was baffled that he couldn't get correct speeds. We looked and looked. The only clue he gave us was that he had to bend the gov. to carb. link to get it to fit. We were still baffled. Finally as I perched myself on top looking down across the front of the engine it came to me. He had mounted the gov. on the wrong side of the mounting bracket! Lined up perfectly with the wrong pulley! How he got the belts to work is beyond me. You would think that bending the link, and changing belts would have been an immediate clue to the person doing the work !

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