Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-22-2005, 08:28 PM   #1
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,126
After driving MH until the fuel gauge reads less than 1/4 tank, I park overnight without attempting to run the Onan. NExt day I refuel. Then try to start the Onan. It starts and runs for about 60 seconds and dies. It wont restart without a lot of priming.

OR
The MH has been parked for a week or two with a full tank. When I try to start the Onan it starts and then dies as in above. Lots of priming and it starts and runs well.

Obviously the Onan has lost its fuel prime but I cannot understand why. ANY IDEAS?
__________________

__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-22-2005, 08:28 PM   #2
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,126
After driving MH until the fuel gauge reads less than 1/4 tank, I park overnight without attempting to run the Onan. NExt day I refuel. Then try to start the Onan. It starts and runs for about 60 seconds and dies. It wont restart without a lot of priming.

OR
The MH has been parked for a week or two with a full tank. When I try to start the Onan it starts and then dies as in above. Lots of priming and it starts and runs well.

Obviously the Onan has lost its fuel prime but I cannot understand why. ANY IDEAS?
__________________

__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 06-23-2005, 03:03 AM   #3
Senior Member
 
troth's Avatar
 
Join Date: Aug 2003
Location: NE Ohio
Posts: 1,177
Stretch, I'd be suspicious of a teeny air leak in the fuel line, especially where any rubber hoses are involved. Check your hose clamps & hoses; replace if they appear cracked on the ends or swollen.
__________________
Last Brave 2004 34D
troth is offline   Reply With Quote
Old 06-23-2005, 01:42 PM   #4
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,126
I will look at the fuel supply line to the Onan, for swelling or otherwise defective looking hose. However if the line has a pinhole that allows air in I dont think it will be visable because air is going in, and not fuel going out. Will let you know.
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 06-23-2005, 01:53 PM   #5
Senior Member
 
rockcj's Avatar
 
Join Date: Apr 2005
Location: Anaheim Hills, CA
Posts: 120
at 1/4 tank, it will shut off. Try filling your tank. It is for safety.

David
05
__________________
rockcj is offline   Reply With Quote
Old 06-23-2005, 02:23 PM   #6
Junior Member
 
Join Date: Feb 2003
Location: Bloomfield Hills Michigan 48302 USA
Posts: 10
Strech-- I have had the exact same problem in my 2000 fds 40 since day one. I rerouted the fuel lines twice with the thought that they might have too much drop when the nose is closed- didn't work. Tightened fittings at both ends of hoses--no difference. To be honest Ihave learned to live with it even tho it's a PIA. I also find it makes no difference if your tank is full, half full or just below a 1/4. If anyone out there has figured this problem out I would like to hear from them. Onan will give you a bunch of blank stares if you ask them. Sorry I couldn't help but at least you know you're not alone. Good post. --- fredbob
__________________
Fredbob is offline   Reply With Quote
Old 06-23-2005, 02:26 PM   #7
Senior Member
 
rockcj's Avatar
 
Join Date: Apr 2005
Location: Anaheim Hills, CA
Posts: 120
I was told by Saddleback RV Service Manager about the 1/4 tank shut-off.


David
__________________
rockcj is offline   Reply With Quote
Old 06-23-2005, 03:28 PM   #8
Senior Member
 
Tom and Patty's Avatar


 
Alpine Owners Club
Join Date: Jun 2004
Posts: 1,850
Mine shuts down at 1/2 a tank. It's worse if I'm going up hill or stop on an up hill. I still haven't had time to see if I can lower the pick-up point.
__________________
Tom, Patty, Hannah "The Big Dog" and Abby Kat, Indianapolis, Indiana 2000 36' FDS 72232 Our Photos
We live out in our old van. Travel all across this land. Drive until the city lights dissolve into a country sky, me and you - hand in hand.
Tom and Patty is offline   Reply With Quote
Old 06-23-2005, 03:49 PM   #9
Senior Member
 
Join Date: Jun 2005
Location: Abington, PA
Posts: 1,103
You can reduce the pick-up point by reducing the length of the pickup tube. Don't ask me how you get it out.
Ted
__________________
Ted & Carol Ulmer
2005 Alpine 34', 34FDDS
2006 PT Turbo pusher
Ted III is offline   Reply With Quote
Old 06-23-2005, 04:16 PM   #10
Junior Member
 
Join Date: Feb 2003
Location: Bloomfield Hills Michigan 48302 USA
Posts: 10
I'm not quite sure where this thread is heading, but if you will reread the original missive by stretch you will see that it has nothing to do with the pickup tube in your fuel tank. The Onan in his and my case will start and run for 30-60 seconds and then stop. In reality it is running on just the amount of fuel that's captured in the hose and it loses prime and dies. You can get it started again, but it will take about 4-5 minutes of priming and restarting. As soon as it restarts it will run just fine for hours. Hope this will clear things up --thanks--fredbob
__________________
Fredbob is offline   Reply With Quote
Old 06-23-2005, 04:35 PM   #11
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,126
right on fredbob. You understand exactly. If I push the prime side of the Onan switch for about 3 minutes it will finally start and run for hours.
I am going to check the hose leading to the Onan. My last motorhome was a 2000 Alpine. I had the same problem, in spades. I even added a check valve into the supply line. It did no good.
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 06-23-2005, 06:02 PM   #12
Senior Member
 
Join Date: Jun 2005
Location: Abington, PA
Posts: 1,103
As a pure novice, what type of fuel pump delivers the fuel to the generator. Is it mechanical or is it electrical. If it is mechanical, can it be changed to an electric pump? For whatever reason the unit is not getting fuel. I am not certain of all of the types but most of the diesel Onan generators have Kubota engines. Why not contact them directly or whosevers make it is. I have operated a repair shop for industrial equipment & overhead cranes for 45 years. Manufacturers are notoriously good people and usually way ahead in the problems that all you folks may be having. Sure is worth a phone call. If you can't locate someone to help, get in touch with me, trust me, I will find the correct individual
Ted Ulmer
__________________
Ted & Carol Ulmer
2005 Alpine 34', 34FDDS
2006 PT Turbo pusher
Ted III is offline   Reply With Quote
Old 06-23-2005, 07:02 PM   #13
Senior Member
 
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,217
I'd guess same as Ted, fuel pump circuit. Could be faulty relay that isn't kicking on to power an electric pump, but that gets kicked closed during the long prime.
__________________

__________________
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
EngineerMike is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
TV/DVD problems when running Onan RobinGio Technology: Internet, TV, Satellite, Cell Phones, etc. 1 07-28-2008 02:43 PM
Genset Emerald I onan, problems starting Hemi Vintage RV's 12 04-06-2008 08:12 AM
Onan/Progressive Problems Route 66 Newmar Owner's Forum 15 06-21-2007 01:35 PM
nhe spec-a onan 6.5 emerald III wiring problems thumbless MH-General Discussions & Problems 4 04-11-2007 01:00 AM
nhe spec-a onan 6.5 emerald III wiring problems New Member Check-In 4 12-31-1969 07:00 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:33 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.