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This is the original carb, ran fine last year for about 5 days worth of bush hogging. Ran for a day and half this year before the rust clogging the system was found. Loosened the clamps on the fuel filter and broke off the fitting the filter screwed into the carb. Then disconnected the throttle/governor linkage at the carb and the choke cable at the carb. Took off two nuts and dropped the carb off to get out the broken end of the fitting. Split the carb to be sure there were no parts of the fitting inside. Used carb cleaner to remove soot and flush out all passages. The governor spring and and connections were not touched. Then reassembled and installed, ran too fast.

When I get back to it, I will pull the carb again and re-check everything there. Then I will check the governor adjustment. The last time I tried it, I also noticed the the exhaust manifold gasket is leaking, so I will also replace that before it causes further damage.

It seems to me that if there was dirt in the carb it would run rough or slow, not fast.

MF135 Zenith Carburetor Problems and adjustment
Massey Ferguson Tractors
Replies 11 Post by ulav8r