Ok. I rebuilt this tractor about a year ago or more. I acquired it blown up and replaced the rods, pistons, rings, oil slinger, starter gear....bunch of stuff I don't remember. When I first started it up, it raced at high rpm no matter what. After fiddling with and adjusting the governor, it ran like a top. I think the reason it blew up is because the governor was likely out of adjustment.
I mowed with it all last year with no problems. It sat all winter. When I went to use it this year mice had built nests packed in around the flywheel housing, down around the heads, etc. I pulled out what I could and ran it. It didn't run right so I broke down and took the flywheel housing and some shields off and really made sure I got all the grass, paper, etc. out that the nests were made of. It seemed to run pretty good.
Then I noticed it was surging. It seemed to be at no load, so I suspected the governor. I fiddled around, it didn't make much difference, I used it....then the other day it started surging worse and quit on me. Of course it died on the other side of the property from my shop, so I had to run back and forth getting tools, etc. Pulled the fuel filter and made sure it was clean. Then I removed the air filter and stuff and checked the carb to see if it was getting gas. It appeared that there was water in the gas. So I drained the gas, almost all of it, my can got full, put fresh gas in and put it all back together. Started it and it seemed to run fine, so I parked it. Then today it was surging bad again. Took the airfilter and stuff off so I can see the carb, governor, etc. The governor "oscillates" and causes the motor to rev up and down pretty consistently. I tried adjusting the governor by bending the tang either way, tried adjusting the screw on the throttle mechanism.....no change. I can physically hold the throttle mechanism still (fighting the governor) and the motor runs steadily.
Does anyone know, or have an educated theory, why this would happen? I don't know of anything other than the fact that it sat outside over the winter (hence I figured water made it's way into the gas tank) that would cause a change in how it ran or would cause the governor to go out of adjustment. Does water float on gas? Maybe I didn't get the water out? But would that cause these symptoms? Could it just be dirt in the carb?
I'm kind of lost here. What a pain. Thanks for any help or suggestions.
I mowed with it all last year with no problems. It sat all winter. When I went to use it this year mice had built nests packed in around the flywheel housing, down around the heads, etc. I pulled out what I could and ran it. It didn't run right so I broke down and took the flywheel housing and some shields off and really made sure I got all the grass, paper, etc. out that the nests were made of. It seemed to run pretty good.
Then I noticed it was surging. It seemed to be at no load, so I suspected the governor. I fiddled around, it didn't make much difference, I used it....then the other day it started surging worse and quit on me. Of course it died on the other side of the property from my shop, so I had to run back and forth getting tools, etc. Pulled the fuel filter and made sure it was clean. Then I removed the air filter and stuff and checked the carb to see if it was getting gas. It appeared that there was water in the gas. So I drained the gas, almost all of it, my can got full, put fresh gas in and put it all back together. Started it and it seemed to run fine, so I parked it. Then today it was surging bad again. Took the airfilter and stuff off so I can see the carb, governor, etc. The governor "oscillates" and causes the motor to rev up and down pretty consistently. I tried adjusting the governor by bending the tang either way, tried adjusting the screw on the throttle mechanism.....no change. I can physically hold the throttle mechanism still (fighting the governor) and the motor runs steadily.
Does anyone know, or have an educated theory, why this would happen? I don't know of anything other than the fact that it sat outside over the winter (hence I figured water made it's way into the gas tank) that would cause a change in how it ran or would cause the governor to go out of adjustment. Does water float on gas? Maybe I didn't get the water out? But would that cause these symptoms? Could it just be dirt in the carb?
I'm kind of lost here. What a pain. Thanks for any help or suggestions.
