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Just picked up a cherry 1450 from a local farm supply store for 450.00. Only issues that I can tell is that the blades need to be sharpened, and the issue I'm posting for information.

When the tractor is at full throttle, and the PTO is engaged, the engine RPM's jump up and down constantly. Is this a carb issue, or a governor issue? And, is there anything I can do to minimize this problem?
 

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Welcome to MTF and happy 4th to ya.

That's one problem I never had with all the tractors and issue that pop up...but it sounds like a carb issue to me. Only cause one of my neighbors had a similar thing happen to him years ago.

Although it just occurred to me another friend messed with his splitter gov and and that engine would surge like your is doing.

Sorry if I'm confusing you but to eliminate the gov I would start by either screwing the adj screw one way or the other a number of turns and check for any change.

Then move to more easy stuff and spray some carb cleaner while it running...and keep spraying.

If you do a search for rebuilding a carb it's real easy to do.

btw I think you got a sweet deal on that Cub.
 

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The first thing I would do, is try to wiggle the throttle shaft, to see if there is any/much play in the hole.

If there is air leaking past the shaft, sometimes the governor will want to "hunt" to maintain it's proper RPM. With air leaking in, it will never "find" it's sweet spot and therefore continue to "hunt".

If this is the case, unless the wear is minimal, adjusting the carb. will be nearly impossible.

This news isn't all bad though, "bushing" the shaft isn't all that hard to do.

Good luck, and it sounds like you got a really good deal!
 
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