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Super C governor killing engine

S

SteveinFL

New User
After cutting down some trees I was using the Super C to drag a log out of the driveway this week when while under load the engine stalled and started to rev up and down hunting for the proper speed. I could start it but it would constantly rev up and down and when I put it in gear it would die.
After initially fearing the worst I am thinking that something gave out in the governor but I am not sure. I checked all the linkage and everything is fine. I have spent some time making adjustments to the bumper spring screw on the bottom of the governor following instructions in the I&T manual. Now the engine will start and run great for about 5 seconds and then the governor will adjust on its own and stall the motor. From the seat I can lean over the side of the tractor and watch it happen. That is the best I have been able to do so far.
Before I really start to get in deep I wanted to see if you guys have any ideas on what else I can check from here. Thanks for the help.
 
The only caution before getting into the governor is that the action you may have seen on the governor arm with it running might only be it's natural action as the motor spins down, dying from some other cause. Could be coil or a fuel problem causing it to lean out.

But you can't rule the governor out. Could be any of the three springs (main, bumper or thrust) within have given out.

The governor is not ugly to get into or work on, but check your spark (especially just after it quits running) and fuel before tearing into it.
 
Symptoms indicate a fuel starvation problem, not a governor issue!

When the engine starts surging try slowly closing the choke. If you find a choke setting that causes the surging to go away, fuel starvation is the problem.

Some possible causes:

- Restriction in the fuel line supply (obstruction in the gas tank covering the fuel outlet, plugged sediment bowl, plugged carb inlet screen, etc.)
- Blocked carb orifice - specifically the high speed jet
- Vacuum leak (look at the carb to manifold and manifold to head gaskets)
 
That is a possibility. I didn't think of fuel starvation as a cause. I did fuel it up before using it that day and it could have stirred up some trash in the tank. I will go through the fuel system tomorrow. Thanks for the advice. Maybe I can keep it running strong into another decade.
 
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