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08-03-2021, 09:13 PM
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#1
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Senior Member
Join Date: Apr 2015
Location: Saint Paul, Minnesota
Posts: 128
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Onan Microlite 2800 runs for about 15 mins - then quits.
1996 Catalina 22' Class C
I got the generator running after changing oil, spark plug. Also blasted carb cleaner into the throat and into the fuel inlet to carb.
Several significant points:
I can get it started if I start the cab engine first - otherwise just winds.
Runs for about 20 mins - then just stops.
Recently replaced coach battery with an AGM.
Didn't run at all before that but all the electrical connections to gen were unhooked.
The connection cable to the AGM battery runs back to the black box behind the rig where the AGM is stored.
The connection cable is a number of individually jacketed strands of small gage wires - don't ask me why, I bought this used.
Also there was a critter nest inside the generator housing but I cleared that out.
Gen keeps running after I shut off the cab engine.
Gen also quits when I disconnect shore power.
Auto transfer switch doesn't switch over to gen even when the gen is running.
Also wire brushed (with drill) all ground connections.
This one grounds to the chassis.
Any suggs ?
__________________
Current (4th) RV: 1996 Coachmen Catalina Class C 22 ft
Previous RV's: 1978 Itasca Suncruiser Class A 22 ft; 2001 Jayco Eagle Class C 28 ft; 1989 Winnebago Warrior Class C 27 ft
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08-03-2021, 09:38 PM
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#2
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Senior Member
Join Date: Jun 2016
Location: South of Atlanta, Georgia
Posts: 2,145
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Not sure about your other issues but I'm betting there is no transfer switch and that you will find a TT30 outlet in the shore cord storage compartment. When you plug into this outlet with the shore cord, you then have generator power in the coach. This is extremely common and works well.
Charles
__________________
'03 Ram 2500 CTD, 5.9HO six speed PacBrake std cab long bed Leer top and 2008 Bigfoot 25B21RB.. Previously, 2008 Thor Freedom Spirit 180, SOLD! 2007 Winnebago View 23H Motorhome, SOLD!
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08-03-2021, 11:18 PM
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#3
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Senior Member
Join Date: Apr 2015
Location: Saint Paul, Minnesota
Posts: 128
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Quote:
Originally Posted by CharlesinGA
Not sure about your other issues but I'm betting there is no transfer switch and that you will find a TT30 outlet in the shore cord storage compartment. When you plug into this outlet with the shore cord, you then have generator power in the coach. This is extremely common and works well.
Charles
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I thought that at first but no - there is a transfer switch.
I'd include a pic but don't know how.
__________________
Current (4th) RV: 1996 Coachmen Catalina Class C 22 ft
Previous RV's: 1978 Itasca Suncruiser Class A 22 ft; 2001 Jayco Eagle Class C 28 ft; 1989 Winnebago Warrior Class C 27 ft
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08-04-2021, 09:52 AM
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#4
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Member
Holiday Rambler Owners Club
Join Date: Jul 2017
Location: florence SC
Posts: 57
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Had problems with my gen running for 5 to 10 min. then stopping. Changed the filter, check the fuel pump, filled carb. with Sea Foam and ended up changing carb. nothing work. Notice that when it did run for the brief time the gen had been setting for a few hours or days. After it had run and stop it would not re-start. At that time I decided to recheck the fuel pump. it was not working. installed a new fuel pump, no problems for the past 2 years.
Good luck
__________________
Jeff & Jodee
2011 Holiday Rambler Augusta 29PBT
Dolly towed 2018 CX5 Mazda
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08-05-2021, 12:06 PM
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#5
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Senior Member
Join Date: Apr 2015
Location: Saint Paul, Minnesota
Posts: 128
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Quote:
Originally Posted by onawing
Had problems with my gen running for 5 to 10 min. then stopping. Changed the filter, check the fuel pump, filled carb. with Sea Foam and ended up changing carb. nothing work. Notice that when it did run for the brief time the gen had been setting for a few hours or days. After it had run and stop it would not re-start. At that time I decided to recheck the fuel pump. it was not working. installed a new fuel pump, no problems for the past 2 years.
Good luck
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So the gen has it's own fuel pump? Would that be in the gen housing before the fuel pump (I know it's not after). This microlite 2800 is hard to access some components unless there is some access cover that I have not yet discovered.
Thanks for any insight.
__________________
Current (4th) RV: 1996 Coachmen Catalina Class C 22 ft
Previous RV's: 1978 Itasca Suncruiser Class A 22 ft; 2001 Jayco Eagle Class C 28 ft; 1989 Winnebago Warrior Class C 27 ft
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08-05-2021, 07:18 PM
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#6
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Member
Holiday Rambler Owners Club
Join Date: Jul 2017
Location: florence SC
Posts: 57
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In my MH have a Onan 4000. Google video on how to change, looked easy enough but you need to remember the exact movements (motion, path) used when removing other parts. 15 min to take apart, 2 hours to put back together.
Only thing I could think I did wrong the first time was checking the fuel pump when the engine was cold. The second time (after all the for mention changes) I attached a temporary fuel line and funnel direct to the carb, filled with gas. Gen ran as long as there was gas in the funnel. I guess the fuel by means of gravity would fill the fuel pump with a small amount of gas and run for a short time.
Hope it’s the answer
__________________
Jeff & Jodee
2011 Holiday Rambler Augusta 29PBT
Dolly towed 2018 CX5 Mazda
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08-05-2021, 10:40 PM
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#7
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Senior Member
Join Date: Apr 2015
Location: Saint Paul, Minnesota
Posts: 128
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Redo
Quote:
Originally Posted by dano726
So the gen has it's own fuel pump? Would that be in the gen housing before the fuel pump (I know it's not after). This microlite 2800 is hard to access some components unless there is some access cover that I have not yet discovered.
Thanks for any insight.
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"before the fuel pump"
I meant before the fuel filter.
__________________
Current (4th) RV: 1996 Coachmen Catalina Class C 22 ft
Previous RV's: 1978 Itasca Suncruiser Class A 22 ft; 2001 Jayco Eagle Class C 28 ft; 1989 Winnebago Warrior Class C 27 ft
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08-06-2021, 05:18 AM
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#8
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Member
Holiday Rambler Owners Club
Join Date: Jul 2017
Location: florence SC
Posts: 57
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Fuel pump is between the fuel filter and carb. Mine requires removing air filter, solenoid and electrical module (pc board) to get to the fuel pump. My problem was getting the pc board back in place. If I hadn’t taken it out, I would have swore it wasn’t meant to go there.
__________________
Jeff & Jodee
2011 Holiday Rambler Augusta 29PBT
Dolly towed 2018 CX5 Mazda
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08-06-2021, 11:13 PM
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#9
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Senior Member
Join Date: Jul 2018
Location: N/E IL
Posts: 2,017
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Like onawing, my Onan 4000 electric fuel pump was the culprit. The generator would run for 15-20 minutes, then die for no reason. After restarting, it would run for an additional 5 minutes thereafter.
I don't know about the Onan 2800, but like onawing says, on the Onan 4000, it's inside, just inside where the fuel line enters the unit. The fuel filter is first, screwed onto the fuel pump. I advise to replace both the fuel pump and the fuel filter together.
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08-07-2021, 10:15 PM
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#10
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Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Aug 2015
Location: Memphis, TN
Posts: 4,350
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The Microlite gives codes, so get book and read, but if a "36", (and other symptoms point to that), I suspect FUEL PUMP BAD/ FAILING, yours a typical symptom, often also causes SURGING ON START, may smoooth out for a while, then SURGE AGAIN, then Die and NOT restart UNTIL cooled 15-30-minutes. Can most likely buy pump Amazon under $30, can be tight work, TORX BIT screws (Mine T27, but not Microlite), 1/4" ratchet, often mount pump, and metal line fittings require LINE WRENCH/ FLARE NUT WRENCH set https://www.harborfreight.com/double...-pc-68865.html
__________________
(TerryH.) 2000-GS Conquest Limited 6266 Class-C 99-E450SD V10
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08-07-2021, 10:53 PM
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#11
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Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Aug 2015
Location: Memphis, TN
Posts: 4,350
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YOU will have to decide (unless you find book that does recommend) IF YOU NEED OR WANT TO REMOVE THE GEN ITSELF, in order to remove sheetmetal or gain other access? Some models TILT Down on hinge, others slide out. Mine (wudda/ cudda been) so much easier if ONAN and Coach MFR has drilled two little holes for pump mount screw access. I may consider sliding mine out (at least partially?) to access, if I ever have to change again..? or maybe not? It cudda maybe been a 10-20-min job (vs 90-minute) in my younger, more limber days?
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(TerryH.) 2000-GS Conquest Limited 6266 Class-C 99-E450SD V10
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08-08-2021, 11:35 PM
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#12
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Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Aug 2015
Location: Memphis, TN
Posts: 4,350
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re: Fuel Pump/ access, I believe Micro pump on Left, but download Parts manual for your model # specs, believe I saw youtube had to remove (solenoid and other items?) to gain access? Yes, another very tight hole? Buy any tool you need, do not try to "get by"... RIGHT tools are cheap and SAVE much in frustration..
__________________
(TerryH.) 2000-GS Conquest Limited 6266 Class-C 99-E450SD V10
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08-09-2021, 06:53 AM
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#13
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Member
Holiday Rambler Owners Club
Join Date: Jul 2017
Location: florence SC
Posts: 57
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2x on that and a good short term memory.
__________________
Jeff & Jodee
2011 Holiday Rambler Augusta 29PBT
Dolly towed 2018 CX5 Mazda
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08-09-2021, 04:41 PM
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#14
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Senior Member
Join Date: May 2005
Location: Illinois
Posts: 128
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I am also having an issue keeping my Onan 7000 running, anyone know which one I need and where to buy?
Also could someone tell me if there is a fuel filter attached to the pump or ?
thanks all
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