bertsmobile1
Lawn Royalty
- Joined
- Nov 29, 2014
- Threads
- 64
- Messages
- 24,705
The lever sets the equlibrium running speed.
ie tension on the spring opening the throttle = force generated by the governor trying to close the throttle.
The limit of travel of the throttle lever sets the maximum no load engine running speed.
The throttle stop screw sets the idle speed
Governed engines are designed to run at two speeds, idle or flat out
Weather you can attain a speed setting between max & min will depend upon the strength shape & wind of the govenor spring, the strength of the govenor mechanism and the wear in the controls.
You are not supposd to be changing the engine speed, the govenor is, which is what the others were trying to say.
As the years go on maximum governed speeds are dropping because the "nannys" want blade speeds reduced.
So my guess is the old spring was set to 3600 rpm while the new is set for 2900 rpm.
being a substantially stronger spring it is holding the throttle closed against the idle stop over a larger range of throttle openings
ie tension on the spring opening the throttle = force generated by the governor trying to close the throttle.
The limit of travel of the throttle lever sets the maximum no load engine running speed.
The throttle stop screw sets the idle speed
Governed engines are designed to run at two speeds, idle or flat out
Weather you can attain a speed setting between max & min will depend upon the strength shape & wind of the govenor spring, the strength of the govenor mechanism and the wear in the controls.
You are not supposd to be changing the engine speed, the govenor is, which is what the others were trying to say.
As the years go on maximum governed speeds are dropping because the "nannys" want blade speeds reduced.
So my guess is the old spring was set to 3600 rpm while the new is set for 2900 rpm.
being a substantially stronger spring it is holding the throttle closed against the idle stop over a larger range of throttle openings