How to adjust the governor on a 10hp Briggs&Stratton?

Question

The model number is 25707 it was manufactured in 1981. It is being used for racing purposes so anything helps

Answer 1

I wouldnt mess with the governer - unless its had some serious machining to balance it out. Lawntractor motors can run max of 3000RPM, stock. If youre looking for more power, look for a larger motor. Over revving a motor can cause explosive results - either rods comming out , flywheel shattering ( it does happen) . How do i know? I ve tinkered on a 14HP OHV Murray - in its current form its running in the 30MPH range, with its governer intact and its a pure stock motor. Its slow from the stock transaxle, i used a 6" pulley on the motor, a 4" pulley on the trans - used bering hubs on front for less friction, and plan a 18HP twin cylender Briggs swap and straight axle rear soon, along with a larger motor pulley, slightly smaller rear pulley, snap back throttle, some large brakes.
Im shooting for 55-60MPH when im done.
Kidd

Answer 2

You could achieve the same result by disconnecting the linkage from the governor arm to the carburetor. Not sure how you would positively control engine speed to prevent over stressing the engine. I am guessing that without the help of the governor, this old engine will not survive very long.

Answer 3

take the side cover off the motor, and remove the governor completly its odd looking shaped like a piviting v that opens and closes . remove it and replace the side cover and then you have no governor at all other than the throtle itsself