Motorhome Magazine Open Roads Forum: Questions about Onan 5500 Marquis Gold Oil Filter
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 > Questions about Onan 5500 Marquis Gold Oil Filter

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Joined: 03/09/2007

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Posted: 05/30/11 06:10pm Link  |  Print  |  Notify Moderator

I am attempting to change the oil in my motorhome, which is a 2008 National Sea Breeze. It has the Onan Gold 5500. When I went to camping world to buy a filter, the chart they had said the Marquis gas generators took either the 122-0800 or the 122-0645. There were other letters after that (like BWG or something like that). I wasn't sure what model I had, so I bought both filter, and just planned to take the "wrong" one back once I got back to my motorhome. When I pulled the old filter off my generator, it was a totally different filter! It was the 122-0836. So now I need to take both of the filters back, and buy the correct one. Why would the chart at camping world not give me the 122-0836 filter for the Marquis generators?

Also, is there anyway to drain the old oil any faster? I have the valve open all the way, but it's very slow in draining!


Generator Jim

Conway, SC

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Posted: 05/30/11 06:35pm Link  |  Print  |  Notify Moderator

"Marquis" is not a model, it is a trim level. You buy parts based on the model number such as; 5BGE, 6.5NHM, HDKAJ, etc. You should find the complete model number on a decal or data plate on the generator, or use the parts book that came with the generator set. 2008 National Sea Breeze has nothing to do with the generator.

You evidently have the newer model of the 5500 gas generator. The oil will drain much faster if the unit has been run until it is fully warmed up.


Jim & Jane Latour
08 Chevy 3500HD, crew cab, dually, Duramax/Allison
05 Wilderness Advantage AX6 365 BSQS, Onan 3.6KY
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Everett wa

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Posted: 05/30/11 06:50pm Link  |  Print  |  Notify Moderator

I use napa/wix filters

Everett, WA
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Stockton, CA

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Posted: 05/30/11 07:53pm Link  |  Print  |  Notify Moderator

Yes the 122-0836 is the right filter for the Onan 5500. Do you also have the right filter removal tool? It is a cup type that takes a 3/8 inch drive ratchet wrench. I have never been able to get a hand hold grip on these filters as there is not enough filter sticking down below to get a grip on it or even get a strap type wrench on it. The right tol makes an easier job. As for draining the oil, I warm the genset up first then open the drain and remove the oil fill cap to let air in and I find it drains better.
Here is the filter wrench I am talking about.
Filter wrench
Onan 122-0836 Filter

2004 Southwind 32VS 8.1 Workhorse chassis
2002 CRV Toad
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Crossville, TN

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Posted: 05/31/11 06:52am Link  |  Print  |  Notify Moderator

Just go to NAPA and get the FIL7398 filter. It's a direct replacement for the Onan filter.


2004 Hurricane 32R (F53)
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