NVTraveler
Nevada
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Joined: 11/13/2006
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Anyoine have a similar experience or advice?
I have a 2007 RT 210P with an Onan generator with 34 hours on it--never a problem. Changed the oil/filter at 20 hours as recommended. Live in the high desert and the altitude switch has been set at approx 1,ooo feet. We traveled up I5 over the mountains from California to Oregon and stopped at a rest area to eat. Started the generator to heat some lunch in microwave and the generator surged/stalled out under load.
Started up fine back in Vegas initially but ever since after about 4-5 minutes of running it starts to surge and eventually stalls. Seems to flood out. Took it to an RV Dealer service shop on the road in Reno the other day and they said I needed a new fuel pump. Doesn't seem right that a fairly new generator needs a new fuel pump but anything mechanical can break. Any ideas before I go back to a local repair shop to have them order a fuel pump based on other shop's recommendation? Thanks in advance!
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portablevcb
Tijeras, NM
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Joined: 05/04/2006
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I always had to readjust the mixture for altitude. But, we live at 6700ft and travel to places that are from sea level to 9000 ft.
If the mixture was off a little my genset would do the same thing. Start up, run for a minute or two, start to surge.
If the mixture is correct and it still has problems, then don't have any suggestions.
charlie
2006 Toyota Tundra Crew Cab
2003 Skyline Nomad 24ft Fiver
Me and Wife
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Fishinghat
Western Washington, USA
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I'd change the fuel filter. A partially plugged filter will gradually starve the engine and cause it to ace similar to what you described.
Next, check the choke. If it is stuck on, the engine would run too rich once it warms up. Good luck. JMHO
Holiday Rambler Navigator DP, Mustang Convertible, and Honda VT1100C Shadow.
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gunny357
North Carolina
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There is a warranty on that Onan. Why do you want to spend money on it when Onan will fix it for free? If s hop diagnosed it as a bad fule pump, why didn't they fix it under warranty?
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pnichols
Santa Cruz Mountains
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Joined: 04/26/2005
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"...and the altitude switch has been set at approx 1,ooo feet."
What is the altitude switch on an Onan generator?
Phil, 2005 E450 Itasca 324V Spirit
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NVTraveler
Nevada
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gunny357 wrote:There is a warranty on that Onan. Why do you want to spend money on it when Onan will fix it for free? If s hop diagnosed it as a bad fule pump, why didn't they fix it under warranty?
Gunny,
I was passin thru Reno, found a Roadtrek dealer to investigate hoping it was an easy fix. When they told me it would take a few hours to replace pump I decided to wait til I got home as I was on a timetable to get to Utah at a reasonalble hour.
As for the other question on the altitude switch, I discovered after reading the Owners manual on the generator (last thing I usually do) that there is an altitude switch setting to adjust mixture from sea level to 10,000 ft. Approx settings only-not a precisely calibrated switch. It is located below the throttle linkage and is acessible after popping the access panel off the generator unit.
Thanks to all for inputs!
GC
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Generator Jim
Conway, SC
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The "altitude switch" is actually a plastic knob on the main jet on the carb bowl. It is 'calibrated' by the marks molded into it at the factory. The knob has built-in stops that prevent it from going more than 3/4 turn. Removing the knob will void the gensets' California Air Research Board warranty on air pollution.
JimL
Jim & Jane Latour
08 Chevy 3500HD, crew cab, dually, Duramax/Allison
05 Wilderness Advantage AX6 365 BSQS, Onan 3.6KY
Retired AF CMS (E9) Power Generation and Onan RV genset Level III tech
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wa8yxm
Wherever I happen to park
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Starts fine, then surge/stall.. I agree, fuel issue, clogged tank outlet, bad fuel pump. clogged filter dirty carb float valve (Assuming it has a carb) Most of those jobs are fairly simple.
Nothin adds excitment like something that is none of your business
John is Near Kenwood TS-2000 housed in a 2005 Damon Intruder 377
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Intruder01
Henderson, NV
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My Onan was doing something very similar... turned out to be the float in the carb was filled with fuel, and sank. Had to buy a whole new carb.
2001 Damon Intruder
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Jack and Jane
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billbounder
western pa.
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Hey Gunny and all you genset gurus...having an issue with MY onan emerald 5500 in my '99 bounder. when it wouldn't run, all checks found a dry-rotted flexable fuel line between the pump and the rigid line on the chassis (it was just sucking air thru a cracked hose). syphoned back up to pump and primed the line from the carb down to the pump and was back in business for another season. now thw same problem again...no fuel in the line. when I try to siphon fuel up thru the line to the pump, I can hear it sucking air up in the area over the coach fuel tank. I can see thru a hole in the chassis that a small length of flex fuel hose runs from the rigid line on the chassis over to the top of the main tank presumably to a fitting on the tank top. I can only assume that this hose is dried and cracked as well, wouldn't you think ?? genset runs if fed fuel at the carb. pump has been bench-checked good. coach tank is 3/4 full and level. must I get a dealer to drop my tank to replace a lousey 18" hose ?? I know what happens when you ASSUME, but do you think I'm barking up the wrong tree ?? thanks for any discussion I might get. billbounder
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