Diffculty starting Onan 2500 genset

Time to clean varnish from the carburetor.
Do yourself a favor and each time before putting gas engine into storage - run carburetor dry. If you don't have fuel valve, install one.
I've been doing it for 25 years and it took 20 years for my 13 HP pressure washer carburetor to need some maintenance. Honda engine.
My lawn mowers did run on 2-years old gas.

My brother is having trouble with this same generator, we did spray starting fluid into it with no problems. It would run as long as we kept spraying fluid into it. For some unknown to us it's not drawing gasoline up to the carburetor.

Harleybullet wrote:
Letting you know that it was low oil level that kept from starting... had to check it manually because the light did not indicate low oil on the panel in the TC... started right up.
Once again thanks for the help and ideas......Dave

The low oil protection system is designed to shut the engine off to prevent serious damage, it's not where the oil level should be run down to as normal operation.

Well there you have it...so glad it was that simple. Again there are a lot of issues it can be. Many discussions over the years and a lot of tears of joy and pain. If your not running it on a regular basis, I would try and do it more often. A good 30 minute run say once a month will keep you confident it will run when you need it to. If you didn't go with all the rundown of suggestions, It's still a good idea to look these things over. If you have the model with the breather tube...spring is when the mud wasps start plugging these things. Check if you have it as it could happen at any time. This is one of the biggest fails that happens on a regular basis because people don't even know it is there.

Harleybullet wrote:
Letting you know that it was low oil level that kept from starting... had to check it manually because the light did not indicate low oil on the panel in the TC... started right up.
Once again thanks for the help and ideas......Dave

Great news.....and good info for Onan owners.

Letting you know that it was low oil level that kept from starting... had to check it manually because the light did not indicate low oil on the panel in the TC... started right up.
Once again thanks for the help and ideas......Dave

I don't know how old it is but it does have a 3yr warranty on it. I just went through the same thing and Cummings/Onen had to put a new carb on a 2015 Gen with 12.2hours on it

Thanks for the info... will start the checklist.... be back in a few days.....Dave

The choke linkage would sometimes bind on ours. On start, the choke would close and stay closed until the linkage slipped back to open the choke.

Bedlam wrote:
If it is difficult after sitting, you may have a propane leak requiring the line to reprime.

Where did he say it was propane operated ??