Check fuel flow through the metal fuel tap under the tank
they corrode internally and block the flow to the catby
fuel flow is fine
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It might be the Low Oil Shutdown. Be sure the oil is filled to the top of the dipstick, and try running it again. If it is low it will kill any ignition sequence as it pulls the oil up into the head and sets off the sensor.
Hope this helps!
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."
SOURCE: wiring diagram for Generac engine on standby generator
here is a wiring diagram for that engine:
SOURCE: 10kw Generac Guardian not cranking, shows rpm sense loss
Sounds like Generator mode switch should be "ON".
SOURCE: I have a 17kw generac generator that will run
I have the 18KW model and was told that most alarms relate to a low battery. Make sure the battery charger in the Transfer Switch is properly feeding the battery or hook up a mobil battery charger to the battery and see if the alarm goes away. Good Luck.
SOURCE: Generac Guardian 15 kw overspeed fault
Did you remember to set the overspeed shutdown threshold on the control board?
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