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Loss of Speed Control

Generac 13 kW air cooled, LP vapor. After startup, speed and voltage regulation is good (119 - 121v) under moderate load for about 5 minutes. Then speed and voltage begin to fluctuate wildly (102 - 122v). Stepper motor throttle linkage moves sharply. Not sure if stepper motor is trying to respond to fluctuations or is CAUSING the fluctuations. Bad control signal coming from Control Circuit Board?? Already replaced the Voltage Regulator Module but no joy.

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Posted on Jan 02, 2017

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SOURCE: generac portable generator over voltage even with new control board and regulator

is engine running at 3600 to 3700 rpm at full load. most small engines run at this speed.you can buy a small tach on ebay TINY TACH.. you have to know what the engine speed is

Posted on Mar 05, 2013

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