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compostibles

cleaning governor

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Hey folks. Took the old 620 out for a mow yesterday, and I was having some problems with keeping a constant speed on the engine under a load. It would start out fine with an RPM of about 2800, and after about 10-15 minutes when I went down a hill the engine speed would pick up to about 3200. It wouldn't respond to the throttle lever unless I pushed the throttle up and pulled it back. Then it would slow way down to about 1100 RPMs. So I adjusted the throttle up a little and it would take off to an RPM of about 2800 right away...I adjusted the fuel/air mix screw on top of the carb, checked the throttle linkage and they all seem to be fine. I sprayed off the governor linkage at the carb...If this sounds like a dirty governor linkage issue, what is the best way to clean it? Or any other thoughts on this issue? Thanks. Jason

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compostibles
Fuel filter seems to be fine. I replaced it last month with the big stock canister filter. The engine has worked well up until recently. The throttle seems to be a bit touchy when the engine is at a slow idle(@1100 rpms), I will give it a tich of gas by the throttle lever and the engine takes off to about 2800 rpms. Once it gets to a higher RPM, then it doesn't respond very readily to the throttle lever. I can get it to idle down to a slow speed by putting the throttle lever all the way up until the engine speeds up, then pull it back. Then it will idle down to 1100rpms...Then the cycle starts again, touchy throttle... Any other thoughts? Thanks again. Jason

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HubbardRA
Jason, Have you had the governor arm loose? I took the one loose on my 13 Hp B/S to adjust the governor and it acted similar to yours. Found out that I had pushed it too tight against the block where the shaft comes out. Put a little clearance in it and re-adjusted it. Works fine now. They do strange things when the linkage is binding up.

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