Onan 5500 generator: Surging + Overheat
Last weekend we heard our toy hauler's generator start to run funny -it was throttling up and down A LOT, with no changes in load. Looked it up, that's called surging apparently. I ran the generator for 60-90 minutes every month all winter while my unit was stored, I was told to do that to prevent varnishing, which is what I hear causes this.
Funny thing - when I went to look at the generator, it was CRAZY hot. I pulled off the cover and waved it back and forth, fanning the unit, and the surging slowed and eventually stopped -seems like it is overheating. I checked for obstructions as well as any leaks in exhaust -could not find anything.
Everything was fine last month, no issues at all. 4 weeks later, generator is acting crazy and it even shut down. Carbon monoxide sensor is even going off in the trailer now -this is really weird. Called the dealer, they will get us in to look at it -IN OCTOBER! We have a 3 week camping trip planned that we are not canceling, and it sure would be nice to have a generator for the trip...
Anyone heard of this? I can see the surging part being related to varnishing -who knows why that happened, but if it did, so be it -but the overheat? I couldn't even touch the manual start button, it was so hot -and that is rubber!
Toy hauler and all gear is only 13 months old. Generator only has 67 hours on it, not even close to a maintenance schedule, if I am reading everything right. I am stumped.
2015 Seismic 3210 5th Wheel Toy Hauler
2015 GMC Sierra Denali 3500 HD Dually Diesel
2010 Can-Am Outlander 650 XTP Max
2010 Can-Am Outlander 800-R XTP Max
2013 Gio Spyder 110cc Kid Quad
2014 Weber Smokey Mountain 22" Brisket & Rib Factory