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


Reply
 
Thread Tools Display Modes
 
Old 07-24-2021, 07:48 PM   #1
Bronze Member
 
Join Date: Apr 2016
Location: Florida
Posts: 28
Default Onan 2500/2800 remote crank not working

Onan model 2.5KVFA26120L, though I think all of the 2500 and 2800s are the same for the remote start panel.

I should mention that I had exercised the generator last week before a trip. On the trip we had a tire blow out. The blow out bent the generator exhaust pipe. The exhaust pipe is a solid pipe from the generator to the end of the pipe. So the generator took quite a shock.

I can crank the generator with the panel on the generator, but no crank with the remote in the RV. The switch appears to function correctly. Though the wiring diagrams are not clear to me. I have checked the wire from the switch to the plug just out side of the generator and all four wires are good.

On the switch side of the plug (male end) I can see that pins A & C connect for Start and pins A & B connect for Stop. E-F I think is used for the generator run light. On the generator side (female end) of the plug I see socket A is ground, socket B is battery voltage 12+ volts, socket C is 5.8 volts (this one does not seem correct) and socket E-F has no voltage/ground when the generator is not running.

So the question is why am I seeing 5.8 volts on socket C? Is this correct? When I short A & C on the generator side I expect the generator would crank, but it does not. Maybe because the voltage is too low.

I was really hopping to not have to pull the generator from between the rear wheels to fix it.

Any suggestions would be greatly appreciated.
Attached Images
File Type: jpg Onan Model Number.jpg (336.6 KB, 6 views)
__________________
TaxWonk
2009 Roadtrek RS Adventurous
TaxWonk is offline   Reply With Quote
Old 08-01-2021, 11:41 PM   #2
Bronze Member
 
Join Date: Apr 2016
Location: Florida
Posts: 28
Default

I pulled the generator and replaced the control module with one from FlightSystems https://www.flightsystems.com/p-56-5299-00.html
Problem fixed.
__________________
TaxWonk
2009 Roadtrek RS Adventurous
TaxWonk is offline   Reply With Quote
Old 08-02-2021, 12:53 AM   #3
Platinum Member
 
rowiebowie's Avatar
 
Join Date: Jul 2018
Location: Texas
Posts: 2,651
Default

Quote:
Originally Posted by TaxWonk View Post
I pulled the generator and replaced the control module with one from FlightSystems https://www.flightsystems.com/p-56-5299-00.html
Problem fixed.
Thanks for the followup and part link. Seems we've had a rash of non start problems with Onans lately. Congrats on the fix.
rowiebowie is offline   Reply With Quote
Old 11-07-2021, 07:06 PM   #4
Bronze Member
 
Join Date: Apr 2016
Location: Florida
Posts: 28
Default

Just following up as it has been couple of months and a few more hours on the generator. Everything seems to be working well.
__________________
TaxWonk
2009 Roadtrek RS Adventurous
TaxWonk is offline   Reply With Quote
Old 11-10-2021, 07:17 PM   #5
Platinum Member
 
Join Date: Dec 2011
Posts: 1,619
Default

Good information & Thank You.

Do you think the impact was the cause of the failure?

The last few weeks I have had intermittment starting problems, for no rhyme or reason the unit will sometimes start but only after climbing underneath, taking the cover off & using the physical start switch at the generator itself.

Recently that doesn't work.

But then I will get back up into the van, use the Remote Switch & sometimes the unit will start.

Last night, in the middle of the night, I checked the oil & found it at the low mark, filled it up & after a few attempts from under the rig & at the remote switch, it started & ran beautifully.

I used Mobil Super 10W 30, Synthetic Blend.
__________________
Full Timer in a 2005 Roadtrek Versatile 190/Super Modified & Lifted, Two 220ah Lifeline 6 Volt AGMs in Series, 250 watts Solar, Victron BMV712 Meter & Victron MTTP 100V/30A Solar Controller, Magnum MMS1012 Inverter Charger, Onan 2.8 Generator, Novakool R3800 Fridge & more ...
themexicandoctor is offline   Reply With Quote
Old 02-23-2023, 07:28 PM   #6
New Member
 
Join Date: Apr 2011
Location: PA
Posts: 12
Default

07 RT190P , generator well exercised w good oil level and had 7/8 full main fuel tank. gen simply would not start even with engine running. took it to my cummins onan big truck depo: it took them 15 minutes to find the fuel pump on the gen w as shot. fuel pump-- readily available. had to drop the gen to replace the tank, so the repair ws about $650.

the tech said many mechanics who don t know what they're doing on onan tell you you need a carb placement , charge you for it, still no joy. he said the fuel pump on the onan is not well protected from rood grime so they see these failures lot . if you are older than 10 yrs and in a state where they use a lot of road salts, check your onan's fuel pump pressure .
CareyM is offline   Reply With Quote
Old 05-28-2023, 02:36 PM   #7
Bronze Member
 
Join Date: Apr 2016
Location: Florida
Posts: 28
Default

The control board is fully potted, maybe there is a relay that was getting weak on the board. Not sure the impact caused the problem but the timing is suspicious.
__________________
TaxWonk
2009 Roadtrek RS Adventurous
TaxWonk is offline   Reply With Quote
Old 05-28-2023, 06:34 PM   #8
Platinum Member
 
Join Date: Nov 2014
Location: PHX, AZ
Posts: 2,660
Default

Quote:
Originally Posted by CareyM View Post
15 minutes to find the fuel pump on the gen w as shot. fuel pump-- readily available. had to drop the gen to replace the tank, so the repair ws about $650.

Some DIY mount a replacement fuel pump, filter and petcock valve outside of the Onan for easy fuel shut off, filter service and pump replacement if required
__________________
Mike
2006 Pleasure Way Lexor TD on a Chev 3500
Previous: tent strapped to Electra-Glide
mkguitar is offline   Reply With Quote
Old 06-02-2023, 02:02 PM   #9
Platinum Member
 
Join Date: Aug 2020
Location: TX
Posts: 179
Default

Quote:
Originally Posted by mkguitar View Post
Some DIY mount a replacement fuel pump, filter and petcock valve outside of the Onan for easy fuel shut off, filter service and pump replacement if required
Thanks for posting the control board fix and follow-up, always good to see results.
I'll be doing the fix that Mike posted if/when the pump on our 2800 fails. After checking board and circuits 😀. I think that this is a great solution that allows an eaay on the road fix later if needed.
TX-Trek is offline   Reply With Quote
Reply

Tags
crank, generator, genset, remote


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

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 06:12 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.