Laws of Physics And The MW Governor

As Jim and the others point out below, the M&W governor is more sensitive (has less droop) than the stock IHC governor. This makes the tractor feel more “snappy” under changes in load. Ie. it responds more quickly as load is increased or decreased. It also holds RPM within a somewhat narrower range through load changes. And it causes the throttle to go wide open sooner as the engine become fully loaded. Combined this gives the operator the sensation of “more power”. But under full load conditions, once both gov’s have driven the carb wide open there’s no difference whatsoever in power.

Incidentally I have two Super M’s – one with an M&W and the other a stock governor. The M&W indeed “feels” like it has a bit more power. OTOH under slow speed/light load conditions the M&W has a tendency to surge or “hunt” occasionally – especially when the weather is very cold.

Old cruse controls on cars were like that, they let the rpm (speed) sag some befor compensating. New vehicles are so precise that the speed stays nearly perfectly at the setting until the mountain being climed pulls it down to the point that the throttle is wide open. Then the speed will continue to decline untill the engine reaches its peak load rating where it will be level for a while (unless the garde gets even steeper. I hope this helps, JimN

Andrew