jcliburn
Gold Member
I have a Brigss & Stratton Power Boss 5500 watt portable generator that recently began running wide open all the time. I suspect the governor has failed, but I have some questions for you folks before I get much deeper into this repair.
In the first picture below, you can see the governor shaft (red arrow) connected to linkage that's tensioned by a spring (green arrow) which guarantees the throttle (blue arrow) is held wide open when the generator is shut down. In the picture, the throttle is wide open, and nothing changes when I start the generator.
When I disconnect the linkage from the governor shaft, I can rotate the shaft freely within mechanical limits. The second picture shows the new governor, and the "mechanical limits" I'm referring to are presumably the flag contacting something inside the crankcase; I can hear a tap-tap inside as I rotate the shaft back and forth.
Is it normal that the governor should rotate freely in this manner? Should I feel resistance? How does the governor "govern"? What's happening inside the crankcase to cause the flag to rotate to a certain position or stay at a certain position?
Assuming I'm gonna have to tear into this beast further, the final three pictures show the engine, rotor, and bolts at the rotor end and flywheel end. Any ideas how to remove the rotor?
Thanks in advance.
Jay
In the first picture below, you can see the governor shaft (red arrow) connected to linkage that's tensioned by a spring (green arrow) which guarantees the throttle (blue arrow) is held wide open when the generator is shut down. In the picture, the throttle is wide open, and nothing changes when I start the generator.
When I disconnect the linkage from the governor shaft, I can rotate the shaft freely within mechanical limits. The second picture shows the new governor, and the "mechanical limits" I'm referring to are presumably the flag contacting something inside the crankcase; I can hear a tap-tap inside as I rotate the shaft back and forth.
Is it normal that the governor should rotate freely in this manner? Should I feel resistance? How does the governor "govern"? What's happening inside the crankcase to cause the flag to rotate to a certain position or stay at a certain position?
Assuming I'm gonna have to tear into this beast further, the final three pictures show the engine, rotor, and bolts at the rotor end and flywheel end. Any ideas how to remove the rotor?
Thanks in advance.
Jay