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Old 12-15-2002, 09:13 AM   #1
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Replacing Onan for a portable generator

I have come to the conclusion that I need a new generator. I have the money now and am looking at a Mitsubishi 6700 REU. Will I be able to install this unit in my motor home? It comes with a remote start cable. Has anyone installed a portable generator instead of going with the Onan? Onan just seem to be to expensive to purchase and to service. For more than half the price I can a bigger one with a littel adjusting like for the tail pipe and mufler will that work? Please feel free to advise soon. The site I found is, www.southwestfastener.com, they have a sale till the end of the year.
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Paul Daugherty
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Old 12-15-2002, 09:28 AM   #2
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There is currently a discussion on this at irv2.com, in the fifth wheel and travel trailer forum. The problem is this, portable generators are designed to be operated in an open space with plenty of air circulation. RV type generators are designed to operate in enclosed spaces, and have been designed to operate from external fuel tanks or propane. Operating a portable generator in an enclosed space is asking for trouble, both the operator and generator itself are at risk.
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Old 12-16-2002, 05:24 AM   #3
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Will it fit in the generator compartment? When I had to replace the one in my 74 Argosy the only one that would fit was the Onan. The good part of that is they are 2 cylinder and run at 1800 rpm. There is less vibration and the noise level is lower with this type of engine. Honda's are also good, but wouldn't fit through my opening.

It takes a lot of adapting any time you change. Mine was a long way from a simple r&r. I had to build all new slide mounts and carriers for the electrical and fuel line. You do need a lot of free air opening to cool these. The RV ones have a lot more ducting to provide the proper cooling. Despite the cost difference I would go with one that is designed for the limited clearance and harsher environment of a motor home.

John
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Old 09-10-2006, 03:59 PM   #4
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I have a 1990 Winnebago.
My Onan Emerald 1 Genset, model 4BGEFA261006 will cost from $2,500. to ??? to repir according to the Onan people here.
Do you know if portable units have been successfully installed in Motorhomes?
Any information of suggestions would be appreciated.
Barry Greenslade
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Old 09-10-2006, 06:34 PM   #5
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Maybe you can mount a portable on a slide out tray, and slide it when in use so it is in the open air?? Just a thought. PeterH did a Honda in his moho, but it was installed in the regular way and is a bit pricier than a portable would be.
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Old 09-10-2006, 07:10 PM   #6
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Quote:
Originally Posted by 74Argosy24MH
Will it fit in the generator compartment? When I had to replace the one in my 74 Argosy the only one that would fit was the Onan. The good part of that is they are 2 cylinder and run at 1800 rpm. There is less vibration and the noise level is lower with this type of engine. Honda's are also good, but wouldn't fit through my opening.

It takes a lot of adapting any time you change. Mine was a long way from a simple r&r. I had to build all new slide mounts and carriers for the electrical and fuel line. You do need a lot of free air opening to cool these. The RV ones have a lot more ducting to provide the proper cooling. Despite the cost difference I would go with one that is designed for the limited clearance and harsher environment of a motor home.

John
................I'll respond , even though this post is getting close too 4 years old . MOST , RV specific gensets run at 3600 rpm whether gas or diesel . Specifically , the TWO that Run at 1800 RPM are the Onan , 3 cylinder diesels rated for 10kw and 12kw . The 5.5kw , 6.5kw , 7.5kw , and 8kw(diesels , all).....ALL run at 3600 rpm's . And , All the Onan gas RV gensets run at 3600 rpms . r66
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Old 09-27-2011, 09:19 AM   #7
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That's not TRUE that all gas Onan Gens. run @ 3600 RPM, my 5.5 runs @ 1800 RPM & is stated so in the Onan maintenance manual !!!!!


Also the Gen. has to be removed from the bottom, you have to ramp up the Coach & remove the bolts & drop it out of the bottom.
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Old 06-15-2012, 09:43 AM   #8
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Most older Onan's actually run at 1800 v/s 3600. My 92 Marquis 7000 is an 1800 RPM unit. Usually the newer RV gensets run at 3600. 1800 RPM produces less vibration and less noise.

One more thing to consider is duty cycle. Most "portable" generators are not designed for continuous use. Onan gensets can be had for a reasonable price used. I'd rather pay $1500 for a good low hour used Onan then a new portable genset. Easier install, more dependable and less likely to cause issues.
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