brian dill

New User
I have a Super MTA that I have been working on and I cannot get the rpms to rap up over 1250. I have read the blue ribbon manual and checked all the adjustments on the governor and linkages and everything seems to be correct. Am I on the right track or is this more of a carburetor issue. When I purchased this tractor the carb had just been rebuilt by Denny's carb shop so I assume this isn't the problem.
 
Brian, I can think of two possible causes of this problem. First is possibly not getting enough air through the air cleaner. You could check this by disconnecting the air cleaner at the carb. If that makes a big difference, then cleaning the air filter assembly will help.

The second thing is really rare, but I have seen a new carb throttle shaft where the fork and throttle plate slot were not in the right alignment, so the throttle plate could not open far enough. Like I said, this is a remote possibility. Bob
 
(quoted from post at 21:37:56 08/20/16) I have a Super MTA that I have been working on and I cannot get the rpms to rap up over 1250. I have read the blue ribbon manual and checked all the adjustments on the governor and linkages and everything seems to be correct. Am I on the right track or is this more of a carburetor issue. When I purchased this tractor the carb had just been rebuilt by Denny's carb shop so I assume this isn't the problem.

If the carb was rebuilt by Denny's, that might very well be the problem. You may even be looking for another carburetor.
 
If the engine is in reasonable tune and you initially synchronize the governor linkage to carburetor butterfly shaft and if the spring linkage lever stop screw inside governor housing is being moved to stop when contacting housing with hand throttle? Governor spring is weak or something not moving freely in governor or throttle tube or carburetor shaft. Or you didn't try backing the stop bolt out to raise RPM.
 
Well not being there to see for myself i can not say why for sure . What would be great would be for you to remove the side plate off the gov. and take a clear picture of the inside of the gov. Also there can be NO SLOP in the linkage and i am sure that it has it's fair share of slop since it has had extinctive field testing all of it's working life . Then there is the fact that DENNY's rebuilt the carb and god only knows what they did they may not even put the correct pieces back in it . I have seen first hand his work and how well he stands behind it . You may just have a weak spring or it could be something else. I have repaired many problems on M-450 linkage problems BUT you have to have everything working for you . My S/MTA runs out at 1950-75 and can go higher if i want BUT i have to take all the slop out before .
 
Well since Dennys rebuilt the carb, i would start by having the carb rebuilt by a professional not those clowns. If that don't help it may need a new carb.
 
it could be the shaft that holds the yolk to govener case is not lined up to let gov bearing go back though the shaft it has the half moon cut out on the shaft not letting the engine speed up. you need to turn the outside end where the half moon shaped end let it go though the bearing all the way though.
 
(quoted from post at 19:38:57 08/22/16) it could be the shaft that holds the yolk to govener case is not lined up to let gov bearing go back though the shaft it has the half moon cut out on the shaft not letting the engine speed up. you need to turn the outside end where the half moon shaped end let it go though the bearing all the way though.

I agree, but both times it happened to me it went the other way. The motor went CRAZY and I shut it down in a hurry.
 
This sounds like possibly your clevis pin is too long or the cotter pin is catching or hanging up inside the vertical linkage housing. Just something
to check. Bob
 

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