Recently we lost power, Generator never kicked on. When I checked the circuit board the overspeed indicator was lit. This has happened occasionally before. When I manually started it it runs 10 seconds then surges and shuts down Time after time after time. Appreciate any help with this.
Generac Power Systems 004992 0 004992 1 37kW NG 40kW...
Generac Power Systems 004992 0...
Generac Power Systems 004992 0 004992 1 37kW NG 40kW...
Generac Power Systems 004992 0...
SOURCE: Generator runs, but does not generate electricity
Reset / tickled? There are resistors and diodes in the end of the alternators rotor (the bit in the middle that spins) If these look ok visually then change the capacitor which is a barrel shaped object usually with 4 prongs on the end. Without a capacitor the genset will not produce a voltage.
SOURCE: 10kw Generac shut down overspeed
Make sure that the throttle linkage is all there and not damaged/misadjusted, then get a manometer and check your inlet gas pressure. Gas pressure should be 8 inches of water column and stay there running or not.
Carl
SOURCE: onan 4000 start good runs only ten minutsand shuts down,starts up
First locate the oil pressure switch and see if you can bypass it,then see if it runs. If not check the fuel filter and fuel pump,make sure solonoid for fuel pump is kicking on.
SOURCE: The generator starts up runs for about 15 seconds and shuts down.
Check the oil pressure switch
If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c
SOURCE: Generac 43903 standby Generator overspeed indicator on starting
I have a generator that did the same thing. It would start and then stop within a few seconds. The more expensive generators have an oil level safety switch to prevent the engine from burning up. There is usually a wire connecting to the switch on the outside of the engine near the oil fill hole. Remove this wire and try to start the generator. If it runs without a problem then it is the switch. You need to remove the switch and take it apart carefully and clean it. There is a small float inside the assembly. When the oil runs low the float allows the switch to short to ground which kills the spark to the spark plug. Hope that helps.
Bob Janelli
I’m happy to help further over the phone at https://www.6ya.com/expert/bob_62dfa2f81bb55288
Testimonial: "This is good information in the event that the low oil switch is part of the problem."
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Generac 40kw LP
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