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Old 03-18-2008, 04:30 PM   #1
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I have a Onan Maquise 5500 Generator in my 2002 Pace Arrow Mtr Hm that will start run a few seconds and then die. Was told by a mechanic at Mtr Hm Dealer that the Carburator is probably plugged or dirty and that it could not be cleaned or repaired that I would have to get a new one. Can anyone shed some light on this. why can't it be cleaned and a repair kit put in it? A new one is $295 Also when I checked the flashing light for error codes I am getting a 32 or 33 error code. anyone know what that means?
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Old 03-18-2008, 04:30 PM   #2
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I have a Onan Maquise 5500 Generator in my 2002 Pace Arrow Mtr Hm that will start run a few seconds and then die. Was told by a mechanic at Mtr Hm Dealer that the Carburator is probably plugged or dirty and that it could not be cleaned or repaired that I would have to get a new one. Can anyone shed some light on this. why can't it be cleaned and a repair kit put in it? A new one is $295 Also when I checked the flashing light for error codes I am getting a 32 or 33 error code. anyone know what that means?
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Old 03-19-2008, 08:04 AM   #3
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You might try soaking it with some carburator cleaner to loosen up the junk. Generators need to be run about once a month for 45 minutes with a load on it.

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Old 03-20-2008, 01:53 PM   #4
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if you have the book that came with your genny it will have the codes in it. those carbs are dirt simple. go for it.
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Old 03-20-2008, 02:43 PM   #5
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Well since I started really checking into this matter and talking to several different people about it (i even went to a Onan repair depot and talked to a factory mechanic. Here is what I learned. These carburators are very touchy. Even a tiny bit of varnish or gum Not running for several weeks or a month cause's The majority of the problems for this generator, The altitude adjustment on these cards has to be set with a special machine. I removed the carburator and used a spray can of Carb cleaner and removed the float bowl and made sure that there was no varnish or gum in the unit. also sprayed into all orifice openings and made sure that none where plugged. I still have the same problem. The fuel pump is OK and so is the oil sensor. Error code 32 probably indicates that it is the brushes, stator or rotor or the control module board.
Warning. If you attempt to clean the carb your self. Do not I repeat do not remove any jets or the altitude control. If you do you will have to buy a new carb $218 and labor. I did not remove anything lucky for me as the carb is not the problem. I would try installing or cleaning the brushes But there is very little space and it takes a small hand to get in the area where they are located. I think I will take it to the service depot and have them fix it..
Mel
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Old 03-20-2008, 04:00 PM   #6
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I bought a 98 Bounder with an onan 6500 that had been stored for some time. The onan did not run very well so I removed the carb and found crud in the float bowl. I cleaned it and it ran a lot better but it surged. I replaced the spark plugs and now it runs great.
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Old 03-20-2008, 04:29 PM   #7
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I had a similar problem with my Onan on my 96 Southwind,the genset would start and run as long as you held down the remote start button on the dash. But as soon as you released it, it would die. Replaced the start switch and now it works fine.
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Old 03-20-2008, 05:56 PM   #8
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Mine won't keep running even if I hold the start switch from either location 2002 Pace Arrow dash switch and one on the onan. Error code 32 it only has 156 hours on it. maybe the brushes.
Mel
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Old 03-20-2008, 06:19 PM   #9
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Had a similar problem on a previous onan 6500. These carbs make look simple but there are only a few serviceable parts available from Onan (float,gasket,needle/seat) type of stuff. No overhaul kit. I ended up replacing the carburetor and spark plugs and it was fine after that. Before I would spend the bucks on a new carb, make sure you get those codes figured out and fixed otherwise throwing good money out the door. It sounds like your immediate problem is the controller board but an Onan tech should be able to verify.
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Old 03-20-2008, 07:36 PM   #10
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Mel B, had a similar problem with our 5500, when I had a new carb installed the tech said it looked as if there was gas leaking from the top of my fuel tank. Sure enough there was a break in the hose to the fuel line feeding the genset and it was sucking air. I believe that was the problem all the time. Anyway it works fine now. Good luck with ferreting out your problem.
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Old 03-21-2008, 01:39 AM   #11
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Mel B:
Error code 32 probably indicates that it is the brushes, stator or rotor or the control module board. </div></BLOCKQUOTE>

I had the same symptom of starting, then immediately stopping on our old Class C. It turned out that the stator was gone bad. If I recall, the stator produces the electricity to keep the engine running once it's away from the battery power for starting.
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Old 03-21-2008, 11:21 AM   #12
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Your owners manual should have the codes listed for your model. Their website shows that 32 is low cranking speed (less than 180rpm for 2 seconds).

It recommends checking battery & connections.

I would try starting it when the MH is running to see if the additional power might help as the MH alternator usually charges all batteries.
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Old 03-21-2008, 02:11 PM   #13
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Yes I got the code and discussed it with a mechanic at a Onan Depot facility. The battery is less than a year old and the cables are clean and tight. I thought the same thing and tried to start it with the coach engine running. Still the same problem. I have a appointment this monday to take it in to the Onan Depot for diagnostics. Will see what they come up with. Thank you for the reply.
Mel
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Old 03-24-2008, 03:04 PM   #14
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I took it to the Onan Service Depot this morning. They say I have to have a new Carburator and maybe a Controller board. I questioned them at great length. and here is what I found. They hooked a special circuit board up to the generator that bypasses all of the safety features and permits the unit to run it would run but was running rich and the choke butterfly had to be held open. to keep it running. the choke is controlled by the controller board. But they said that it will do that when there are problems with the carburator. I will find out Wednesday.. They had to order the carb. I had to pay up front for the part. I will keep the old carburator just in case. I was told that the carburator is the throw away type as they cannot be rebuilt. no extended warranty will pay for any carb work period. So I am stuck. But they will pay if the Controller board is bad.
Mel
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