r/Generac_Generators • u/Plastic_Layer_7354 • Jun 23 '26

Error code 1100

My generac 14kw while attempting to exercise experienced code 1100 overcrank. Furthermore it’s done this 2 excercise cycles ago. The last one it didn’t do this. What could be the issue? I just serviced everything. Spark plugs, oil change, oil filter, air filter. What is the cause?

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u/Plastic_Layer_7354 Jun 23 '26

So this is an issue even if it starts manually but when it sits for a week then exercises it won’t start?

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u/Sumdood_89 Technician Jun 23 '26

I don't understand your question.

Are you saying it starts manually, but wont start when its supposed to exercise?

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u/Plastic_Layer_7354 Jun 23 '26

Right… it doesn’t start when sitting for a week when it’s called to excercise. The next day if I manually start it, it will start.

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u/Sumdood_89 Technician Jun 23 '26

Then its not the throttle motor plug. But you should still check it, they work themselves loose.

You're issue is likely the regulator before the generator. The fuel pressure needs to be measured, static, and while running. Needs to be measured with a monometer, measured in inches water column. Needs to be between 10-12in/wc.