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Old 01-09-2025, 08:46 PM   #1
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2012 Interstate Coach
Upper Sandusky , Ohio
Join Date: Nov 2024
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Generator exhaust ?

I have a 2012 Airstream Interstate 3500-Have a Cummins Onan 2500 LP generator that is mounted on back of coach. Exhaust bracket broke and exhaust was ripped off before I could stop. So my question-The muffler is located inside a small square under the generator( only about 3.5” x 4”. So is there a cover on the square with a hole in it to mount the exhaust on the muffler or is it just open and u mount the exhaust to the muffler. Cummins doesn’t seem to have a definitive answer so I thought other owners of the similar vehicle might know if their muffle is just open underneath their generator
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Old 01-10-2025, 12:48 PM   #2
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2009 22' Interstate
Rockwell , North Carolina
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Quote:
Originally Posted by Beeman2 View Post
I have a 2012 Airstream Interstate 3500-Have a Cummins Onan 2500 LP generator that is mounted on back of coach. Exhaust bracket broke and exhaust was ripped off before I could stop. So my question-The muffler is located inside a small square under the generator( only about 3.5” x 4”. So is there a cover on the square with a hole in it to mount the exhaust on the muffler or is it just open and u mount the exhaust to the muffler. Cummins doesn’t seem to have a definitive answer so I thought other owners of the similar vehicle might know if their muffle is just open underneath their generator

Most of them don't have a muffler from the factory. My 09 does not. Just a tailpipe. Cummins has a resonator that can be installed in the tailpipe which is said to quiet it down a bit.
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Old 01-10-2025, 09:25 PM   #3
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2012 Interstate Coach
Thompson Falls , Montana
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My coach is a 2012... I will try to look at the Onan muffler/tailpipe set up tomorrow and maybe get a photo or two.... Rod
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Old 01-11-2025, 09:07 PM   #4
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2012 Interstate Coach
Thompson Falls , Montana
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generator exhaust

Mine has no muffler either, just a tailpipe coming out of the square hole in the genes. The tailpipe seems to be connected with a UBolt clamp. Two photos enclosed.
https://www.airforums.com/forums/att...1&d=1736652016

https://www.airforums.com/forums/att...1&d=1736652195

Hope this helps....

Rod
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Old 01-15-2025, 08:15 PM   #5
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2012 Interstate Coach
Upper Sandusky , Ohio
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2012 Airstream Interstate Onan Generator Exhaust

Thanks for the reply and pics of your exhaust coming out of your generator. It was a big help. We should compare other things since our campers are the same year. Where are you located? Thanks again Rod- Steve
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Old 01-16-2025, 09:07 PM   #6
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2012 Interstate Coach
Thompson Falls , Montana
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Steve,
Sent you a reply on the private message link. Rod
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