My 08 Roadtrek has a Gen with 71 hours on it. In Dec we ran it for about 4-5 hours to keep warm coming back from Fla. Since then I have run it every month for an hour or so. Today I started it and turned on the AC and it ran about 10 minuets normally then started to surge then shut off. I found it was low on oil. So I filled it up and it again ran for about 10 minuets then surged a few times then stopped.It will start ok but only run about 10 minuets then stop, it doesn't surge so much anymore it just stops. I tried loosing the gas cap, didn't help. I will replace the fuel filter in a day or 2 and try running some seafoam through it. Any other Ideas?

You should run it at least 2 hrs a month (continuously) at 1/2 to full load. Best guess is the carb is gummed up. The Seafoam may fix it. The carbs can't be rebuilt, and you will have to pull the gen-set to replace it.Also, use a Kill-a-watt meter to check volts, and make sure the frequency is at 60Hz.It may just be running too slow, so is stalling when it gets a little load. There is a screw adjustment on the carb linkage to speed up, or slow down the gen-set.Make sure the altitude adjuster is set correctly.

Its not running too slow, and the Voltage and freq is right on, It runs just fine until it just stops. Like it runs out of gas.No sputtering, no backfiring it sounds completely normal then it sometimes starts to surge 1 or 2 times then stops. I have started it and loaded it about 6 times and its always the same.

larrylwill wrote: Any other Ideas?If your coach gas tank is 1/4 or lower, the generator will either not start or start and run for a few minutes and then sound as if it is running out of gas before it stops.So make sure you have at least a 1/4 tank as shown on your dash fuel gauge.Bill

Onan 2600 generator | Good Sam Community

22 Replies

BudJ
Explorer
May 28, 2015
larrylwill wrote:
I just went out and started the gen, it ran about 5 min unloaded and I heard it puff one time then smooth out again. I then turned on the air condition and it ran until the 1/10th turned over about 15-20 min total. Then it cycled about 3 times the just stopped dead. I immediately started it again and it ran about 30 sec the just stopped dead again, then It wouldn't start. It acts like its starving for gas, but what do I know.?

Do you have a 44 Magnum?

Bud
larrylwill
Explorer
May 28, 2015
I just went out and started the gen, it ran about 5 min unloaded and I heard it puff one time then smooth out again. I then turned on the air condition and it ran until the 1/10th turned over about 15-20 min total. Then it cycled about 3 times the just stopped dead. I immediately started it again and it ran about 30 sec the just stopped dead again, then It wouldn't start. It acts like its starving for gas, but what do I know.?
larrylwill
Explorer
May 28, 2015
I'll be changing the filter this weekend and running something through the carb.
loving_retireme
Explorer
May 27, 2015
I also felt it might be the VR, but why would it always stop after 10 minutes and not be random. The Onan uses about 0.4 gallons an hour (under light load) and since "larrylwill" unit is only running about 10 minutes it's only burning about 9 oz of gas before stalling. Sure sounds like it is gas related. I am with Handbasket on this one, not a gummed up carb (it runs well before quitting), but a clogged fuel filter or something else cutting off the gas supply.
My_Roadtrek
Explorer
May 27, 2015
With only 71 hrs I doubt the spark arrester is clogged.
Handbasket
Explorer
May 27, 2015
Start by suspecting the fuel filter, since it's cheap & easy, and fits the symptoms well. If it's running good while it runs, it's probably not a gummed up carb, but Seafoam or Techron won't hurt.

That leads to three other possibilities: clogged spark arrestor screen in the exhaust (doesn't quite fit symptoms, but can be DIY'd), failing fuel pump (fits symptoms, $$, and generator has to come out), or voltage regulator (somewhat fits symptoms, $$, can be DIY'd, troubleshooting chart in Onan manual & on Flight Systems website).

Jim
My_Roadtrek
Explorer
May 26, 2015
Maybe the high speed jet is clogged. Try and get the Seafoam, or other carb cleaner, directly into the carb.
larrylwill
Explorer
May 26, 2015
Its 3//4 full and level.
overbrook
Explorer III
May 26, 2015
larrylwill wrote:
Any other Ideas?

If your coach gas tank is 1/4 or lower, the generator will either not start or start and run for a few minutes and then sound as if it is running out of gas before it stops.

So make sure you have at least a 1/4 tank as shown on your dash fuel gauge.

Bill
larrylwill
Explorer
May 26, 2015
Its not running too slow, and the Voltage and freq is right on, It runs just fine until it just stops. Like it runs out of gas.No sputtering, no backfiring it sounds completely normal then it sometimes starts to surge 1 or 2 times then stops. I have started it and loaded it about 6 times and its always the same.

Forum Discussion

Onan 2600 generator

22 Replies

About Motorhome Group

Related Content

Onan Generator

Generator operation

Generator noise reduction

Dead Onan Generator

Onan Generator Code 58