User Tag List
Thanks: 0
Results 1 to 9 of 9
Thread: Cummins Onan 5500 LP
-
06-13-2021, 02:34 PM #1
Cummins Onan 5500 LP
A Cummins Onan 5500 LP was installed aftermarket in March 2021 on a 310GK. The generator has 15.6 hours on it and it will not start.
I've checked the following:
1) Oil level (good) [emoji736]
2) Battery (good) [emoji736]
3) Recently fired up as of 2 weeks ago[emoji736]
4) Propane tanks were recently re-filled with gas, have unhooked and hooked them back up.[emoji736]
**Note, the other appliances (i.e., refrigerator, furnace, etc.).
The generator was installed in March by a local specialist professional who only does RV generator work, and it worked fine. I've combed through the Cummins Manual (https://www.granddesignrv.com/sites/...r%20Manual.pdf).
Is there a trick I am unaware of? Thoughts?
Thanks in advance!Last edited by rwilkins; 06-13-2021 at 02:42 PM.
2020 RAM 3500 Mega-Cab, 6.7L(HO), SWB
-
06-21-2021, 07:54 PM #2
- Join Date
- Aug 2016
- Location
- Tickfaw, LA
- Posts
- 330
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
First what code is it throwing when it fails top start?
Another question if the LPG tanks are full, is it cold outside? Full tanks may not, in cold weather, generate enough gas for the generator to operate. Install a half full tank, which will have more vapor space, and try again.
Always record the codes as it will provide clues to the failure.Foard County News & Sassy Schoolmarm
Nathan & Susan Gifford
Belle, & Danke
53 days camping 8000 miles 2017
2017 Imagine 2800BH
'07 GMC Sierra 2500HD Duramax LBZ 4WD
-
06-21-2021, 09:25 PM #3
Thanks for the remarks/thoughts.
The issue (I failed to mention) is there is no code (alpha, numeric, or otherwise) on the display inside the coach; the generator will crank and tries to start, yet will not turn over. We’ve tried priming several times, even up to 25-30 seconds.
The unit was installed on the coach March 2021, and have put ≈14 hours of use since then. The average temperature has been 89° in the last few weeks, and the only change has been we’ve replenished has been since propane tanks have been filled.
Sent from my iPhone using Tapatalk2020 RAM 3500 Mega-Cab, 6.7L(HO), SWB
-
06-21-2021, 10:25 PM #4
Some basic questions...
1. is it getting fuel?
2. There is an oil level sensor that could be preventing it from starting, check the sensor.
3. Is it getting spark?
I have lots of experience with the gas version of the 5500, not so much with the propane, not sure how much translates though2019 GMC 3500 SRW Sierra Denali Duramax
2020 Reflection 315RLTS
-
06-21-2021, 10:34 PM #5
-
06-22-2021, 09:56 AM #6
- Join Date
- Dec 2014
- Location
- Fountain Valley, CA
- Posts
- 2,254
- Mentioned
- 4 Post(s)
- Tagged
- 0 Thread(s)
Does it have TOO much oil?
Curtis, Christine, Cole, and Charlotte
2007 Chevrolet Silverado Duramax LBZ, CCLB
2020 Momentum 351M
-
07-10-2021, 04:25 PM #7
Cummins Onan 5500 LP
Update (07/09/21):
We took the generator into an authorized Cummins local service shop and the issue was a faulty/blown Solenoid fuse.
Replaced for no cost (under warranty) and it fired right up! It was a coincidence that the fuel source (propane) was replaced around the same time that the generator wouldn’t turn over.
Sent from my iPhone using TapatalkLast edited by rwilkins; 07-11-2021 at 08:40 AM.
2020 RAM 3500 Mega-Cab, 6.7L(HO), SWB
-
09-04-2021, 07:02 PM #8
- Join Date
- Sep 2021
- Posts
- 2
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
My onan did the same thing. The hose from the regulator to the carb was deteriorating and cracking. I replaced the hose and it started right up.it wasntgetting enough suction to open the regulator.it only takes a small hole
-
09-05-2021, 02:55 AM #9
Glad you got it figured out and it turned out to be a simple fix.
2019 GMC 3500 SRW Sierra Denali Duramax
2020 Reflection 315RLTS
Speed Rating?
Today, 12:18 PM in Tires