This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Garden Tractors
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


720 onan muffler

 Post Reply Post Reply
Author
Message
Acdiesel View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Jun 2012
Location: Rochester Ohio
Points: 2494
Post Options Post Options   Thanks (0) Thanks(0)   Quote Acdiesel Quote  Post ReplyReply Direct Link To This Post Topic: 720 onan muffler
    Posted: 26 Jan 2020 at 12:56pm
One of my 720's needed a new muffler and as you know there hard to find and the simplicity ones are not cheap and the outlet pipe goes straight.
So i decided to make my own, thought I would share some pictures.
less then about  $30 to make, and it sounds pretty good.




Edited by Acdiesel - 01 Apr 2020 at 8:29pm
D19 diesel,D17 diesel SER.3 D14 NF,D14 WF, D15 SER.II wf
D15 SER.2 DIESEL,D15 ser.II nf
D12 SER.I, D10 Ser.II
2-720'S

Gmc,caterpillar
I'm a pharmacist (farm assist) with a PHD (post hole digger)
Back to Top
Sponsored Links


Back to Top
macvette View Drop Down
Orange Level
Orange Level
Avatar

Joined: 13 Jun 2011
Location: nekoosa, wi
Points: 1656
Post Options Post Options   Thanks (0) Thanks(0)   Quote macvette Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jan 2020 at 2:03pm
Fantastic that you have the skill set to do this.  Me - not so much!  lol.
Back to Top
TimCNY View Drop Down
Orange Level
Orange Level


Joined: 15 Apr 2014
Location: Upstate NY
Points: 1551
Post Options Post Options   Thanks (0) Thanks(0)   Quote TimCNY Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jan 2020 at 4:02pm
I have an Ingersoll 4020 with an Onan engine, I'm very fortunate that the engine has for the most part served me well. Nice skill set, Acdiesel!
I need more than 200 characters for my "signature." I'd love to see that changed to 250!
Back to Top
Brian S(NY) View Drop Down
Orange Level
Orange Level
Avatar

Joined: 13 Sep 2009
Location: CherryValley,NY
Points: 3371
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian S(NY) Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jan 2020 at 7:36pm
wow very nice

God made man.Sam colt made man equal.
Back to Top
Bird76Mojo View Drop Down
Silver Level
Silver Level


Joined: 12 Mar 2015
Location: Illinois
Points: 221
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bird76Mojo Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jan 2020 at 7:28pm
Looks very restrictive..

Did you at least pull apart the original to see how it was constructed internally?
Back to Top
Acdiesel View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Jun 2012
Location: Rochester Ohio
Points: 2494
Post Options Post Options   Thanks (0) Thanks(0)   Quote Acdiesel Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jan 2020 at 11:09am
yep
I have a couple of these and they look the same inside.
D19 diesel,D17 diesel SER.3 D14 NF,D14 WF, D15 SER.II wf
D15 SER.2 DIESEL,D15 ser.II nf
D12 SER.I, D10 Ser.II
2-720'S

Gmc,caterpillar
I'm a pharmacist (farm assist) with a PHD (post hole digger)
Back to Top
ac720nut View Drop Down
Orange Level
Orange Level


Joined: 09 Feb 2016
Location: Dexter Mi
Points: 1217
Post Options Post Options   Thanks (0) Thanks(0)   Quote ac720nut Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2020 at 4:24am
Very nice fab job
Back to Top
Bird76Mojo View Drop Down
Silver Level
Silver Level


Joined: 12 Mar 2015
Location: Illinois
Points: 221
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bird76Mojo Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2020 at 6:06am
I wasn't trying to bash your build, so please don't take offense to my prior comment.

It's really no wonder that these engines can suffer from carbon build-up if the factory mufflers are that restrictive inside. It's certainly making me think that I'll open up my mufflers in the future.
Back to Top
Steve in NJ View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 12 Sep 2009
Location: Andover, NJ
Points: 11502
Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2020 at 12:00pm
Great fabricating there Dan the man!  Paint em' high heat Black and they'll look like NOS!
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
Back to Top
Acdiesel View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Jun 2012
Location: Rochester Ohio
Points: 2494
Post Options Post Options   Thanks (0) Thanks(0)   Quote Acdiesel Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2020 at 7:02pm
Originally posted by Bird76Mojo Bird76Mojo wrote:

I wasn't trying to bash your build, so please don't take offense to my prior comment.

It's really no wonder that these engines can suffer from carbon build-up if the factory mufflers are that restrictive inside. It's certainly making me think that I'll open up my mufflers in the future.


no offense taken at all, it was a great question.
 that was real my only worry in this project, was making too much back pressure.

Dan  
D19 diesel,D17 diesel SER.3 D14 NF,D14 WF, D15 SER.II wf
D15 SER.2 DIESEL,D15 ser.II nf
D12 SER.I, D10 Ser.II
2-720'S

Gmc,caterpillar
I'm a pharmacist (farm assist) with a PHD (post hole digger)
Back to Top
truckerfarmer View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 26 Jan 2013
Location: Watertown, SD
Points: 3176
Post Options Post Options   Thanks (0) Thanks(0)   Quote truckerfarmer Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jan 2020 at 8:42pm
Rule of thumb is holes should be equal in area to inlet and outlet
Looking at the past to see the future.
'53 WD, '53 WD45, WD snap coupler field cultivator, #53 plow,'53 HD5B dozer

Duct tape.... Can't fix stupidity. But will muffle the sound of it!
Back to Top
HudCo View Drop Down
Orange Level
Orange Level
Avatar

Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3236
Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 02 Feb 2020 at 10:47pm
looks good i have biult alot of mufflers and done alot of snowmobile pipes and the one thing that is certain is that it takes alot of time and most of the time you have to roll the size of tubing that you need but it sure is worth it when you get done
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.066 seconds.


Help Support the
Unofficial Allis Forum