Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 08-24-2022, 02:16 AM   #1
Member
 
Brand: Thor Motor Coach
Model: Vegas 25.5
State: Oklahoma
Posts: 45
THOR #14018
Onan RV QG 4000 Generator

Going to go for broke and see if anyone can help me figure out why my generator (with only 22 hrs) has decided not to start. Have always had a hard time starting and sometimes had to open cover and flip the governor linkage to get it started. Now it will not start at all. Immediately kicks off like it going to start but dies. I am an aircraft tech by trade so believe me I have gone through all the basics (Fuel, ignition, air, etc). If I hold the starter button down it tries to run a little but very low RPM and dies off.
I have pulled carb and looked over (was clean as new) - blew out all orifices,etc.
I was almost sure it was going to be in the PC Board and Tried new PC Board which changed nothing at all.
Even sprayed a little starter fluid in carb inlet - no change.
Checked fuel solenoid, fuel pump, all good.
I can hold starter button and jockey the governor wide open and closed and the generator will putt putt for about 5 secs and then dies.
I have no fault codes/flashes.
Have no hair left trying to figure this one out. (even tried the "Expert" help on JustAnswer) - I knew more about it than the tech.
Any ideas would be welcome.

__________________
tdpinokc is offline   Reply With Quote
Old 08-24-2022, 02:39 AM   #2
Senior Member
 
dkoldman's Avatar
 
Brand: Still Looking
Model: Sunstar 29VE Winnebago
State: Texas
Posts: 5,584
THOR #13058
Quote:
Originally Posted by tdpinokc View Post
Going to go for broke and see if anyone can help me figure out why my generator (with only 22 hrs) has decided not to start. Have always had a hard time starting and sometimes had to open cover and flip the governor linkage to get it started. Now it will not start at all. Immediately kicks off like it going to start but dies. I am an aircraft tech by trade so believe me I have gone through all the basics (Fuel, ignition, air, etc). If I hold the starter button down it tries to run a little but very low RPM and dies off.
I have pulled carb and looked over (was clean as new) - blew out all orifices,etc.
I was almost sure it was going to be in the PC Board and Tried new PC Board which changed nothing at all.
Even sprayed a little starter fluid in carb inlet - no change.
Checked fuel solenoid, fuel pump, all good.
I can hold starter button and jockey the governor wide open and closed and the generator will putt putt for about 5 secs and then dies.
I have no fault codes/flashes.
Have no hair left trying to figure this one out. (even tried the "Expert" help on JustAnswer) - I knew more about it than the tech.
Any ideas would be welcome.

You did not say how old is the RV/Generator? 22 hours and 1 year old is one thing 22 hours and 4 years old is entirely different.

Onan Support practically gave me a AGS begging me to use the genny or at least exercise as much as possible. They state a lot of RV owners seldom run their gennys and when they do they have issues, they get it fixed and repeat the process. They end up hating Onan; but the real issue may not be the carb or parts. If it is less than 1 year old under warranty; and with what you have already done and described, I would take it to a Onan dealer.
__________________
2019 Sunstar 29ve; Toad Lincoln Navigator; RVi Brake 3 & Command Center; Roadmaster Nighthawk Tow bar & Baseplate; Sumo Springs; Safe T Plus; Onan EC-30 AGS; Vmax 250ah AGM; T-Mobile Internet; H/W Heater / Chassis Disconnect Switches; Southwire Surge Guard 44270 & 34951 w/Monitor 40301; Jet Flo Macerator; Alpine SPE500 Speakers; Visio M21D-H8R
dkoldman is offline   Reply With Quote
Old 08-24-2022, 02:42 AM   #3
Site Team
 
16ACE27's Avatar
 
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,116
THOR #7035
Quote:
Originally Posted by tdpinokc View Post
Going to go for broke and see if anyone can help me figure out why my generator (with only 22 hrs) has decided not to start. Have always had a hard time starting and sometimes had to open cover and flip the governor linkage to get it started. Now it will not start at all. Immediately kicks off like it going to start but dies. I am an aircraft tech by trade so believe me I have gone through all the basics (Fuel, ignition, air, etc). If I hold the starter button down it tries to run a little but very low RPM and dies off.
I have pulled carb and looked over (was clean as new) - blew out all orifices,etc.
I was almost sure it was going to be in the PC Board and Tried new PC Board which changed nothing at all.
Even sprayed a little starter fluid in carb inlet - no change.
Checked fuel solenoid, fuel pump, all good.
I can hold starter button and jockey the governor wide open and closed and the generator will putt putt for about 5 secs and then dies.
I have no fault codes/flashes.
Have no hair left trying to figure this one out. (even tried the "Expert" help on JustAnswer) - I knew more about it than the tech.
Any ideas would be welcome.
Are you priming it per the manual?
Have you checked choke operation?
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
16ACE27 is offline   Reply With Quote
Old 08-24-2022, 11:45 AM   #4
Senior Member
 
Brand: Thor Motor Coach
Model: Vegas 24.1
State: Florida
Posts: 887
THOR #5313
Does it seem like it has compression? Buddy had his lose a valve spring retainer giving start/attempt to run/no codes as you describe. It had very low hours when it happened. Been good since.
__________________
Muggs is offline   Reply With Quote
Old 08-24-2022, 11:59 AM   #5
Senior Member
 
Brand: Thor Motor Coach
Model: Miramar
State: California
Posts: 891
THOR #22927
1. Must have over 1/4 tank of fuel.
2. Are you getting fuel from fuel pump when activate starter? Remove hose after fuel pump to generator, and check.
__________________
Grumpy Grampa is offline   Reply With Quote
Old 08-24-2022, 01:46 PM   #6
Senior Member
 
Brand: Thor Motor Coach
Model: Chateau 24F
State: Ohio
Posts: 4,087
THOR #16721
If you got starting fluid to actually burn, the engine should have revved up until it burned the charge. If it didn't, I'd guess you have other mechanical issues.

How old is the rig?
Has the generator EVER ran okay?
Is the gasoline in your tank old?
Are your batteries all charged AND in good condition?

Be sure you've covered ALL the simple things before diving into catastrophic territory. 95% of generator problems are simple ones... they're just hard to isolate.
__________________
Be creative, and have a fun life...
...and don't be an @**hole! -Ken Block
Chateau_Nomad is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 09:12 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2