Magnum M14 - Replacement Muffler

[TC10284 111]

I got one of these to replace the broken muffler on a Magnum M14. Tried installing tonight, but the exhaust opening is the same size as the muffler opening. 

This might be a dumb question, but am I supposed to bend out the opening of the muffler a little so it will fit onto the engine exhaust or do I need do something else?

https://www.ebay.com/itm/234786178898?hash=item36aa58c752:g:STAAAOSwxhtjeHNt&amdata=enc%3AAQAHAAABAEtJePchRyB6Fol5hRm54kb0Bz7K%2FWpaKZPEi9dBmro6XPsiXUBw%2FDOA%2Fo8QuDhWhnLsmmsGqQlcnal4MI8rnrg1yWY5eShx3dTPtX5TQdPyTfF4yoDgCwz414nMNy1doWv6VgacdH385NTDNSCVpPDcBKBVFK8YLQ7XVmab3b3hPJPFxpuo1QSNmL5QXjhZ9%2Fa8P7whxLinK4PoTQoPQ%2B4e%2BhIcAHX0SeozpXD0ihSonQXlxODEinnMcNlPIqNIHY9BLDbUwcDg8%2FQ6Uw4TFa0Qyr6RCy9VX%2Bc4S3fIRLA8ui8HkWLAoWh2J3hqsaQobqcmXKGYtCLYi8cXKnspZiM%3D|tkp%3ABFBM_N2tgOZh

[Rick3478 428]

That looks like a Cub Cadet muffler.  I don't have any experience with them, you may need a Cub exhaust nipple to fit properly.  Or maybe you can bump it out a bit with a pipe expander.  What'cha gonna do with the outlet then?  It's gonna blast right onto your right leg unless you add a bend or deflector.  Someone familiar with Cadets chime in here?  I'm sort of guessing, but it doesn't look like the usual WH part.

[TC10284 111]

So this is one that was suggested to me in the past as a replacement. 

Is there some kind of replacement muffler you know of that I can get instead? 

[pfrederi 17,741]

I have that same Cub muffler on a couple K series fit right over the unthreaded end of the exhaust nipple.

 

 

[ri702bill 8,327]

Paul - good use of the concrete slabs to make a solid loading ramp...

 

[TC10284 111]

Well that's interesting...
I am going to take some pics later today. But they are definitely the same size. I did tried bending it out a little last night with what I had, but still wouldn't go on. So instead of continuing to mess up the muffler, I came here to ask instead. 

[ri702bill 8,327]

The slip-over inlet on the muffler for my C81 has a pair of 1/8" wide thru cuts about 1 " deep on opposite sides - seen that type of connection on auto exhaust before. Uses a small - 1-3/8" muffler clamp - easy on, easy to remove for service. You MAY want to try that.....

Bill

[TC10284 111]

1 hour ago, ri702bill said:

The slip-over inlet on the muffler for my C81 has a pair of 1/8" wide thru cuts about 1 " deep on opposite sides - seen that type of connection on auto exhaust before. Uses a small - 1-3/8" muffler clamp - easy on, easy to remove for service. You MAY want to try that.....

Bill

 

So if I understand correctly, that's exactly like mine. Yet, I can't get it to fit.

I must be doing something wrong or ignorant. Probably just ignorant. I'm not afraid to admit it either. Hah. 

Maybe I just need to try bending it more. I have the muffler clamp. 

Edited March 30, 2023 by TC10284

[ri702bill 8,327]

How much rust buildup on the short 1" pipe on the engine?? Can you measure both with a caliper (not a tape measure) to get an idea of the interference??

As Rick mentioned - you may need to remove the pipe and use one for a Cub IF those have a smaller OD to fit your muffler....

Bill

[oliver2-44 9,756]

55 minutes ago, ri702bill said:

How much rust buildup on the short 1" pipe on the engine??

Does you engine  block have a 1" pipe stub coming out of it for the exhaust?

If so, you could use a hand grinder and put a bit of taper on the exhaust nipple.

I checked and there are lots of 1-1/8" pipe expanders for sale. 

I think I'm going to pick one of these up next time they have a 20-30% off sale!

https://www.harborfreight.com/medium-exhaust-pipe-expander-57707.html?utm_source=google&utm_medium=cpc&utm_campaign=12144811130&campaignid=12144811130&utm_content=129616991021&adsetid=129616991021&product=57707&store=2996&gclid=CjwKCAjw5pShBhB_EiwAvmnNV9qfIvukKpYHEgUcB0NtvXvWtnuc0quEsJpWUnOj2AO0Jo66GuXWFhoCAGYQAvD_BwE

1" black pipe has and OD of 1.301  which is just smaller that 1-5/16  ( 1.312 )

[Rick3478 428]

7 hours ago, pfrederi said:

I have that same Cub muffler on a couple K series fit right over the unthreaded end of the exhaust nipple.

 

 

I see what you did with the down front angle.  I'm guessing the OP might have a 300 series with the Magnum engine, and don't know if you can do that with the wider hood.

[TC10284 111]

26 minutes ago, Rick3478 said:

 

I see what you did with the down front angle.  I'm guessing the OP might have a 300 series with the Magnum engine, and don't know if you can do that with the wider hood.

 

414-8

[TC10284 111]

Here are some pics. 

https://photos.app.goo.gl/etR4kju4pUPX1raz9

[Rick3478 428]

3 hours ago, TC10284 said:

Here are some pics. 

https://photos.app.goo.gl/etR4kju4pUPX1raz9

 

Yeah that doesn't look big enough.  So, the OEM 112213 was superseded by 94-3739 when Toro added a heat shield, and the new part will fit with or without the shield.  You can break or grind off the shield mount tabs if their appearance offends you.  I think it's still available.  Or were you just looking for something cheaper?

[TC10284 111]

29 minutes ago, Rick3478 said:

 

Yeah that doesn't look big enough.  So, the OEM 112213 was superseded by 94-3739 when Toro added a heat shield, and the new part will fit with or without the shield.  You can break or grind off the shield mount tabs if their appearance offends you.  I think it's still available.  Or were you just looking for something cheaper?

 

Yeah, the original one would be nice, but not $350 nice.

Really just need something that would fit and work at this point. Muffler is the only thing holding me up from firing it up. 

Edited March 31, 2023 by TC10284

[pfrederi 17,741]

Magnums used an expensive exhaust nipple.  You could pull it off and sell it, then use some Black Iron pipe and a 45 degree elbow.  i am not a home now but this weekend I can take a couple pictures of my Magnum with just plain pipe fittings.

Edited March 31, 2023 by pfrederi

[TC10284 111]

1 hour ago, pfrederi said:

Magnums used an expensive exhaust nipple.  You could pull it off and sell it, then use some Black Iron pipe and a 45 degree elbow.  i am not a home now but this weekend I can take a couple pictures of my Magnum with just plain pipe fittings.

 

That would be good if you could please sir. 

[Rick3478 428]

4 hours ago, pfrederi said:

Magnums used an expensive exhaust nipple.  You could pull it off and sell it, then use some Black Iron pipe and a 45 degree elbow.  i am not a home now but this weekend I can take a couple pictures of my Magnum with just plain pipe fittings.

 

Yeah, the cast "S" pipe.  A couple standard nipples and a 45 might actually fit the Cadet muffler.  Or you could come straight out and put a salt shaker or tubular muffler on it.

[TC10284 111]

7 minutes ago, Rick3478 said:

 

Yeah, the cast "S" pipe.  A couple standard nipples and a 45 might actually fit the Cadet muffler.  Or you could come straight out and put a salt shaker or tubular muffler on it.

 

I'm thinking of just going the straight pipe and salt shaker or tubular muffler for simplicity sake. I don't like the looks (or sound) of them, but I'm ready to get this one back in service. 

Is it a 1 and 3/8" threaded pipe? 

Edited March 31, 2023 by TC10284

[pfrederi 17,741]

One way to do it  I tried to use stuff I had.  This is an M16 the exhaust port is larger (1-1/4) You should be able to use a 1' 45 street L and a nipple...

[TC10284 111]

Thanks!

Good pics.

 

How do you like that muffler? I was looking at those on Amazon last night wondering if it would work well. 

[pfrederi 17,741]

They are OK  The Cub may. be a bit quieter.  Here is a cub muffler using just an 45 elbow.  again this is a 16 K341 and the exhaust port is 1-1/4  your should be 1"  so no reduction bushing needed.