1. Chapter 6
Governor Systems

2. A governor system maintains a desired speed regardless of the load applied to the engine.
Operates like a cruise control on a car.
Top no-load speed – Top engine speed without any load.

3. Parasitic load – any load applied to the engine above the friction load of an engine, such as a lawn mower blade.
Speed sensing device – senses the speed of the engine and is connected to the throttle.
Governor spring – pulls the throttle toward WOT.

4. Governed Speed – the balance point between the forces of the speed sensing device and the governor spring.
Pneumatic governor system – uses air from the rotating flywheel to sense engine speed.

6. Mechanical governor system – uses a gear assembly that runs off the camshaft to maintain engine speed.
Uses flyweights and centrifugal force to open and close the throttle plate.