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It is possible that your voltage regulator is shot but before purchasing the volt regulator try flashing the fields first and make sure the brushes and rings are clean.
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See following link https://www.generac.com/service-support/product-support-lookup
Check fuse and connections between start switch, control board, and starter solenoid.
ENGINE CONTROLLER CIRCUIT BOARD GENERAL: The engine controller board is responsible for crank- ing, startup, running and shutdown operations. The board interconnects with other components of the DC control system to turn them on and off at the proper times. It is powered by fused 12 VDC power from the
Beware of an adjustment complexity with an new kind of poweroutlet automatic voltage regulator avr , have you measured the generator UNLOADED for 230 volts ?
because it can be normal that 67 volts output changed when you connect an paint heat gun i was surprised a few weeks ago that i get an GENMAC 8000 that is a look a like generator coming from china build . first i was measuring some of the same output AC instead of 230volts.
Usually the generator will shut down if the ac is not present coming out of the generator. You stated that it still runs but no power on the output. Check your breakers first to make sure they are working properly. Depending on what board you have you can check to see if ac is present getting back to the board as well. If your board does not have this then they are using the frequency as a safety disconnect feature. That would lead you back to the regulator or loose connection or..dirty slip rings if this unit has brushes.
check your frequency of the ac, if this is high, then adjust the rpms.
If that is fine and it is shutting down, check overspeed adjustment on control board if it has it.
If the pull start works, but the electric start doesn't try the following. Either give the battery on the generator a full charge, and if after a full charge it doesn't start, get a new battery.
under warranty , you best have to wait the time as anything you do to fix it will void the warranty which will suit the service agent just fine if you void the warranty he will get 2 hours travelling time plus the cost to repair time so don't touch it
Take a resistance reading across the brushes with and Ohm meter. (not running) You should read a low resistance. If you have no resistance across the brushes then then either the brushes are not mating with the armature or the the armature is open.
IF you have resistance then the AVR (Automatic Voltage Regulator) in the endcap has failed. With the engine running and the Brush block disconnected you should have 4 - 12 VDC on the two wires going to the brush block. No voltage = bad AVR.
It is possible that your voltage regulator is shot but before purchasing the volt regulator try flashing the fields first and make sure the brushes and rings are clean.
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