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WTB: 170 175 gas Nelson muffler
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10708 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Topic: WTB: 170 175 gas Nelson muffler
    Posted: 28 May 2025 at 7:41pm
I want to buy a new Nelson muffler for a AC 170 gas. The Stanley is driving me nuts! Any help appreciated. Thanks, Tracy
No greater gift than healthy grandkids!
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Alvin M View Drop Down
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Joined: 24 Jun 2018
Location: PA
Points: 793 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alvin M Quote  Post ReplyReply Direct Link To This Post Posted: 21 hours 39 minutes ago at 5:19am
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10708 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 42 minutes ago at 8:16pm
While we are at it, what does the original Nelson muffler for a 170 gas look like? Is outlet centered or close to one edge of oval body? What diameter is inlet? What diameter is outlet. Parts manual shows a different number for diesel and gas. Any help appreciated. Tracy
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DrAllis View Drop Down
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Joined: 12 Sep 2009
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Original 170/175 gas muffler looks very much like a 180/185 muffler except the exhaust pipe is smaller in diameter but about the same height and offset. The 170/175 gas muffler is outlet is offset and identical to a series 4 D-17 except the exhaust pipe is a little bit larger in diameter (rated speed now at 1800 RPM) and taller like a 180/185. I have a 180/185 muffler on my 170 and also had one on my Dad's series 4 back in 1971 or 72. It requires sliding a larger diameter pipe over the existing exhaust manifold pipe and plug welding it to get the muffler to fit correctly. They do sound better with that larger outlet !!
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