(quoted from post at 15:12:55 10/21/12) What do you know about governors?
Roger

Roger again. My throttle and RPM's fluctuate up and down. Is this a governor problem or something else. I re-built the carb and the engine starts great.
 
See that gray bar just above here? Click on the massey. The Massey Harris Ferguson forum will have someone who will know what's up with that, maybe not for a few hours or a couple days, but you can search the archives on that subject till then too. Help's to tell the guys the serial number too, but I think all MF50 gassers were Cont.Z145's, we'll see.
 
Could be the governor, could be a vacuum leak has it surging and wandering, you have to figure out if the governor moves before the engine RPMs change (causing the rpm CHANGE) or after/in response to the engine rpms changing (trying to keep the RPMs steady).
 

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