Tecumseh OVRM120 Surges
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Tecumseh OVRM120 Surges
I have a 7 year old Tecumseh OVRM120 that surges mostly on the low speed setting. It is worst during cold start probably due to the lean condition, but on the high setting the surging is almost gone. I think I have traced it down to a bad throttle shaft - the rpm smooths out when I spray the throttle shaft with carb cleaner. I have a few questions. Can I replace throttle shaft on this carb? Does the carb body normally wear on this carb instead of the throttle shaft? Does anyone know the carb number for OVRM120? Where I can get an on-line manual/diagram? Thanks
#2
The spec number off your engine is also needed to locate the correct part number for the throttle shaft used on your engine.
Yes, sometimes the body of the carburetor also wears in addition to the throttle shaft.
It's also possible that you may have some ristriction in the metering circuits of your carburetor causing this problem.
Yes, sometimes the body of the carburetor also wears in addition to the throttle shaft.
It's also possible that you may have some ristriction in the metering circuits of your carburetor causing this problem.
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OK, here are the numbers:
Spec number is 22043E
Eng Family 195AA
Date of Mfr 0335J
Can I mic the throttle shaft or check something else to determine if it is bad? The shaft does not feel like it has play in it. Can these carbs be rebuild with a cleaning or a dip and a kit, or is it better to replace?
Spec number is 22043E
Eng Family 195AA
Date of Mfr 0335J
Can I mic the throttle shaft or check something else to determine if it is bad? The shaft does not feel like it has play in it. Can these carbs be rebuild with a cleaning or a dip and a kit, or is it better to replace?
#4
You may be able to straighten it out by cleaning it with a good spray cleaner and replacing the orings in the carb. If you don't feel play in the throttle shaft, it's not bad enough to be the cause of the problem.
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I took a closer look and there is definitely about 0.020 " play in the throttle shaft. Looks like I'll replace it and hope the carb body is not worn. Anyone have the diameter spec of the carb body or throttle shaft?
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I have a 7 year old Tecumseh OVRM120 that surges mostly on the low speed setting. It is worst during cold start probably due to the lean condition, but on the high setting the surging is almost gone. I think I have traced it down to a bad throttle shaft - the rpm smooths out when I spray the throttle shaft with carb cleaner. I have a few questions. Can I replace throttle shaft on this carb? Does the carb body normally wear on this carb instead of the throttle shaft? Does anyone know the carb number for OVRM120? Where I can get an on-line manual/diagram? Thanks