Coast Resorts Open Roads Forum: Class A Motorhomes: Onan Problem
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Class A Motorhomes

Open Roads Forum  >  Class A Motorhomes  >  All

 > Onan Problem

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next
haste maker

alabama

Senior Member

Joined: 05/29/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 05/07/23 05:51am Link  |  Quote  |  Print  |  Notify Moderator

I have a 7000 watt gas Onan that runs great without the A/C turned on, but sometimes NOT every time it will stop running after the A/C has been on for a few hours...any ideas what the problem could be? I have had both coil packs & the fuel pump & spark plugs replaced.

This generator is in a 2007 32BA gas using a Ford chassis..


Retried Teamster
2007 Allergo

bgum

South Louisiana

Senior Member

Joined: 02/22/2006

View Profile


Offline
Posted: 05/07/23 10:54am Link  |  Quote  |  Print  |  Notify Moderator

Does it throw any codes?
OVER HEATING?

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 05/07/23 11:54am Link  |  Quote  |  Print  |  Notify Moderator

Will it start up within a few seconds(less then 5) when you restart? Or, do you have to crank a lot to get it to restart? Doug

haste maker

alabama

Senior Member

Joined: 05/29/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 05/07/23 03:47pm Link  |  Quote  |  Print  |  Notify Moderator

No codes...

Yes it will restart in a few minutes not seconds & run 14 hours or more with the A/C off

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 05/07/23 06:51pm Link  |  Quote  |  Print  |  Notify Moderator

haste maker wrote:

No codes...

Yes it will restart in a few minutes not seconds & run 14 hours or more with the A/C off


Odds are you have a defective rubber fuel supply line from the gas tank. It is old and rotted. When under load the Onan uses more gasoline. NOT under load it may have enough gasoline to run. The best way to confirm this is to connect a gallon gasoline can with a short rubber fuel line and retest. IF it runs under load under load, then you need to replace the supply fuel line. If it does NOT stay running check the oil viscosity, and make sure it is correct and the oil is at the correct level. When you do NOT have a fuel supply problem and the Onan dies, it will then restart with in 10 seconds. But taking longer means the onan fuel pump is trying to deliver fuel to an empty carb bowl. Doug

haste maker

alabama

Senior Member

Joined: 05/29/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 05/08/23 06:39am Link  |  Quote  |  Print  |  Notify Moderator

Thanks I will check into that when I get home, on a trip right now.

haste maker

alabama

Senior Member

Joined: 05/29/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 05/08/23 05:39pm Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

haste maker wrote:

No codes...

Yes it will restart in a few minutes not seconds & run 14 hours or more with the A/C off


Odds are you have a defective rubber fuel supply line from the gas tank. It is old and rotted. When under load the Onan uses more gasoline. NOT under load it may have enough gasoline to run. The best way to confirm this is to connect a gallon gasoline can with a short rubber fuel line and retest. IF it runs under load under load, then you need to replace the supply fuel line. If it does NOT stay running check the oil viscosity, and make sure it is correct and the oil is at the correct level. When you do NOT have a fuel supply problem and the Onan dies, it will then restart with in 10 seconds. But taking longer means the onan fuel pump is trying to deliver fuel to an empty carb bowl. Doug


Doug I am on a trip now but today I started the generator & turned on the front A/C to keep the cat cool while we where stopped to eat, we were only away from the RV about 30 minutes & when we returned the generator had quit, but did start up & I let it run with just the rear A/C on for the next 4 hours while we were driving to our next stop & had no problems..also it now has a code 47 which was the same code it had when I replaced the coil packs & fuel pump & spark plugs...any ideas?

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 05/09/23 11:44am Link  |  Quote  |  Print  |  Notify Moderator

test with just the front AC for a few hours. Sometimes a defective capacitor or compressor will load down a Genset and kill it rather than kill the breaker. Doug

haste maker

alabama

Senior Member

Joined: 05/29/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 05/09/23 05:15pm Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

test with just the front AC for a few hours. Sometimes a defective capacitor or compressor will load down a Genset and kill it rather than kill the breaker. Doug


I did that today for about 2 hours without any problems, while driving on the road, I wonder if the insulated front cover on the generator and the metal door in front of the generator is casing to much heat while I am parked.

haste maker

alabama

Senior Member

Joined: 05/29/2009

View Profile



Good Sam RV Club Member

Offline
Posted: 05/30/23 06:31am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for all the input on my generator problem, I have return home & have some tools to check thing with, & I found the slip rings in mine are black not copper, I am going to order the Slick Slick from Flight Systems & clean these rings.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next

Open Roads Forum  >  Class A Motorhomes  >  All

 > Onan Problem
Search:   Advanced Search

Search only in Class A Motorhomes


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2024 CWI, Inc. © 2024 Good Sam Enterprises, LLC. All Rights Reserved.