17.5kw Will Not Idle Up

Generac, Guardian, Honeywell, Siemens, Centurion, Watchdog, Bryant, & Carrier Air Cooled Home Standby generator troubleshooting and repair questions
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New Member
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Joined: Fri May 22, 2020 9:43 am

Greetings, I pulled my +/- 10 year old 17.5kw Generac from storage - been sitting 4+ years, no fuel however in the tank. After some clean up and a new battery, got it started. It will idle at LOW RPMs as if the Idle Control is ON, but moving the Idle Control to OFF does not move the generator into higher RPMs (and thus electric production). Any suggestions about where to look? Many many thanks!
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Posts: 1859
Joined: Sat Aug 04, 2018 8:46 pm
Location: Clawson, MI

The first place I'd look is the stepper motor, to see if it's moving at all. You might have a fuel issue with a plugged carb, or you may have an electronics side issue with the controller, the switch, or the stepper motor.
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