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07-11-2016, 07:47 PM
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#1
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Generator Silencer
Yesterday I received the Onan Cummins resonator - 50 bucks from Amazon, four 1 1/2" clamps, two 1 1/2" metal couplings, and two smal rolls of muffler tape because the exhaust pipe as well as inlet and outlet of the resonator are 1 1/4 in diameter so I rolled some tape between pipes and couplings, all those $25 Advance Autoparts. Cut 10 inch of pipe in a middle, connected all together, put JB-epoxy in the seams, and painted the entire work with high-temp anti-rust paint spray $4 from Home Depot. All done in my home garage. The pictures are attached.
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07-11-2016, 07:51 PM
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#2
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Installed it back to the van, and the gen became really quieter.
If anyone have done it before, please share with me if I did right - is there no difference between inlet and outlet direction of flaw? Because I did not find any notes about it anywhere. Thank you!
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07-11-2016, 08:00 PM
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#3
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4 Rivet Member
2016 Interstate Grand Tour Ext
Houston
, Texas
Join Date: Oct 2015
Posts: 333
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07-11-2016, 08:49 PM
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#4
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Rivet Master
2016 Interstate Grand Tour Ext
Bellevue
, Washington
Join Date: May 2016
Posts: 689
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Mine is still sitting in its box . Hope to find someone to do the work as I am not looking to spend more time under the van.
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07-11-2016, 09:01 PM
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#5
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Thanks Mcrider, so I did correct if there is any flaw direction )
Amirm, there is really not difficult. If you don't like to do it yourself and don't want to pay a fortune at the dealership appointment, just go underneath of rear left side, and unbolt two nuts that holds the clamp of pipe tip, and two nuts which holds the clamp next to the generator, and remove the pipe from the gen. Bring that pipe and your new-in-box resonator to a local welding shop and they will do it for you all for 20-30 bucks. Then you will need to do is the rest - put the pipe back.
And Bingo )))
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07-11-2016, 09:48 PM
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#6
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Rivet Master
2016 Interstate Grand Tour Ext
Bellevue
, Washington
Join Date: May 2016
Posts: 689
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Oh, I didn't realize it is just bolted together! Thanks a bunch. I might give that a try.
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07-11-2016, 09:57 PM
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#7
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Rivet Master
2011 Interstate Coach
Overland Park
, Kansas
Join Date: Aug 2011
Posts: 2,798
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Quote:
Originally Posted by Mr. B
Yesterday I received the Onan Cummins resonator - 50 bucks from Amazon, four 1 1/2" clamps, two 1 1/2" metal couplings, and two smal rolls of muffler tape because the exhaust pipe as well as inlet and outlet of the resonator are 1 1/4 in diameter so I rolled some tape between pipes and couplings, all those $25 Advance Autoparts. Cut 10 inch of pipe in a middle, connected all together, put JB-epoxy in the seams, and painted the entire work with high-temp anti-rust paint spray $4 from Home Depot. All done in my home garage. The pictures are attached.
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My pipe was a press fit into the muffler so only needed two clamps. While it did quiet it down somewhat, it's still loud. Good thing I did mine as the pipe had a crack in one of the bends so I welded it myself.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.
2011 Interstate SOLD! Upfitted 2017 Transit 350. SOLD!
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07-11-2016, 10:10 PM
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#8
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Rivet Master
2011 Interstate Coach
Overland Park
, Kansas
Join Date: Aug 2011
Posts: 2,798
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Quote:
Originally Posted by amirm
Oh, I didn't realize it is just bolted together! Thanks a bunch. I might give that a try.
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Here's my install thread
I used the Cummins Muffler from Amazon.
Cummins Power Generation 155-2449
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.
2011 Interstate SOLD! Upfitted 2017 Transit 350. SOLD!
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07-11-2016, 11:39 PM
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#9
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Rivet Master
2016 Interstate Grand Tour Ext
Bellevue
, Washington
Join Date: May 2016
Posts: 689
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Thanks 73. Was just reading your thread . It is so handy to have such information on the forum.
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07-11-2016, 11:42 PM
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#10
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Mark, your pipe is connected to the curbside of gen, but mine is on the left.
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07-12-2016, 08:16 PM
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#11
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Rivet Master
2011 Interstate Coach
Overland Park
, Kansas
Join Date: Aug 2011
Posts: 2,798
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You have the newer generator that Airstream started using when they switched to the Magnum inverter/charger.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.
2011 Interstate SOLD! Upfitted 2017 Transit 350. SOLD!
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07-12-2016, 11:11 PM
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#12
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Okay I got it why
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07-12-2016, 11:22 PM
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#13
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Rivet Master
2011 Interstate Coach
Overland Park
, Kansas
Join Date: Aug 2011
Posts: 2,798
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Jim Parrett @ Airstream told me it was something about compatibility.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.
2011 Interstate SOLD! Upfitted 2017 Transit 350. SOLD!
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07-12-2016, 11:33 PM
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#14
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Today I was in the trip to Miami, and I used the gen, and one time I released the start button too early, so the gen started to work for a second and shutoff. Then it did not want to start, it's starter turned with no ignitions. After 10-15 minutes I started it normally, and it's fine again. It was similar to old carburator engines ))))
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07-12-2016, 11:35 PM
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#15
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Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
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I learned something about generators when I put a muffler on one of mine.
Yeah, an advanced muffler quiets things down some, but most of the noise comes from the crankcase etc.
I am sure that is why most advanced and expensive inverter generators come housed in a sound deadening plastic case.
Gradiens super tenui glacie.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
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07-13-2016, 01:17 AM
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#16
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Yes, and we need to look some way to insulate the generator itself then...
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07-13-2016, 12:53 PM
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#17
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Rivet Master
2016 Interstate Grand Tour Ext
Bellevue
, Washington
Join Date: May 2016
Posts: 689
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Best way to "quiet" the generator is to not use it! The engine alternator charges the batteries at far higher current than the generator+charger do. It is also far quieter.
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07-13-2016, 02:49 PM
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#18
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Rivet Master
2015 Interstate Ext. Coach
Lake Mary
, Florida
Join Date: Jan 2016
Posts: 504
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Gen's primary use is AC.
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07-13-2016, 03:33 PM
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#19
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4 Rivet Member
2015 28' Flying Cloud
Newtown
, Pennsylvania
Join Date: Jan 2015
Posts: 315
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Quote:
Originally Posted by amirm
Best way to "quiet" the generator is to not use it! The engine alternator charges the batteries at far higher current than the generator+charger do. It is also far quieter.
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I wasn't aware of that. Thanks
Bruce
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07-07-2020, 04:01 PM
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#20
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2 Rivet Member
2017 Interstate Grand Tour Ext
CANON CITY
, Colorado
Join Date: May 2020
Posts: 47
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