Satoh S650G - Soaring RPM problem

JTbowman · Jun 25, 2010

Hi All,

I have owned an Satoh S650G for a couple years now, and recently a new problem has showed up. It runs OK but at time, especially when the load get lighter (i.e. going down a small hill) the RPMs start to soar, and get up to 3000+. Throtteling all the way down doesn't always help and to get it to stop I sometimes have to kill the engine. I recently worked on the carb and replaced a worn out accelerator plunger. Other than that I think it all looked OK.

So I suspect it my be some kind of carb adjustment I need to make or possibly something with the governor. Please let me know if you can help.

mit · Jun 27, 2010

if you trottle down the rpm should go down on a good working tractor.if this does not happen something is preventing the butterfly valve from closing.this could be something in the linkage or the governor or both.sounds like something is flipped flopped cause it should trottle down on lighter loads.

hoverdave · Feb 26, 2011

I have the same soaring RPM problem with my S650. Does anyone have any decent adjustment instructions for the throttle and governor? The manual is very vague.

Hoverdave