onan generator troubles

Don't rule out the possibility that a rodent has chewed wires to the regulator. you may be able to repair it for less and a dollar.

IMO I would get a second opinion just because it 14 years old doesn't mean anything, how many hours does it have? Before I spent money take a can of fresh fuel place it on ground run a new hose right to genny and see what it does you just may have a bad fuel line sucking air. Also try lifting pan above genny then see what happens also put in a new fuel filter. This is a cheep way to checking fuel problems.

use it or lose it hold more true on machines of any type.

Chopperbob wrote:
Turns out the rotor came in contact with

Stator. Fried regulator. Labor was $120/hr
I think. Maby corrosion? Caused by
Not running it.

It's not the first one that's been ruined by sitting.

Jim, "A smile: To expose part of one's skeleton in a gesture of goodwill."

Turns out the rotor came in contact with

Stator. Fried regulator. Labor was $120/hr
I think. Maby corrosion? Caused by
Not running it.

jrdr653 wrote:
Had a simuliar problem and it was the carbarator, if is a KY they cannot rebuilt and you must by new. It is worth money to have someone do the work.

mine was a K and was told no kit is available. It was worth the $$$ it runs better than ever

Had a simuliar problem and it was the carbarator, if is a KY they cannot rebuilt and you must by new. It is worth money to have someone do the work.

Like I said above mine was the carb. Symptoms also point to slip rings, voltage reg etc. The dealer can access codes and mine turned out to be the carb. They only charged me 1 hr for diag/repair $127 and $285 for the carb. Was a little surprised @ the cost of the carb but they diagnosed it quickly & correctly. I picked it up an hr after the tech started on it. Pleased with the service of Cummins Rocky Mtn in Phx.

Mine was doing the same thing, pulled off intake manifold and carb, cleaned carb (pulled apart,dipped, blew out all jets passages, etc, put back together) same thing, then cleaned out oil pressure switch and it starts and runs great now.

Really reluctant to get into this because you have an expert on scene telling you what his expertise and testing say. But still, this is a Forum:
1. 100% behind the idea of carb trouble. Technically a "replace as assembly" item but some have had luck with repairs. The Stuck Throttle idea intrigues me and makes sense. If shop labor's involved, cheaper and more certain to simply replace.
2. Those logic boards fail pretty often. I think allowing the genset to cool a little by running unloaded before shutting down might help preserve them. Dinosaur replacements are supposed to last longer than OEM. Hope your shop consideres those. Flight Systems has some parts too, but I don't know about your model.
3. A Stator Rotor has lots of ways to go bad. Dirty slip rings doesn't mean BAD, though. The failure I've heard most about is from sitting so long that the laminated steel parts rusted and swelled. Then the rotor can't, well, rotate. Those few months don't sound long enough for that to happen if it ran last winter.