A quieter PT422

[Phils]

I had discussed this in the "customization" forum, and since it's done and working I thought it appropiate to post the photo here.

I installed a Supertrap muffler on my 422 a week ago. It provided a significant decrease in noise. The machine is now only as loud as a normal lawn tractor (which is about half as noisy as it was). I initially installed it according to the directions, with a hose clamp. As I expected, after about a half hour of stump grinding it fell off, with the sudden increase in noise making it obvious what had happened. I reattached it temporarily with a couple of screws and will weld it on next chance I have.

Total price for it was $90, which included the muffler, resonator and three 3-paks of discs. The application says to use one disc for each 3HP, so I should have needed 7 but since you buy them in paks of 3, I put all nine on. I've noticed no reduction in power, only less noise.

Phil

 

[MuncyBob]

Thanks for the pic and info...looks like a muffler on a muffler? This won't have any negative effect on the engine I /forums/images/graemlins/confused.gif hope!

 

[pequeajim]

WHere did you get this from?

 

[Phils]

I got it from Jacks Small Engines dot com:

Supertrap muffler

Phil

 

[Phils]

I can't imagine anything bad it could do, as there's no perceptible back pressure with those 9 plates installed.

</font><font color="blue" class="small">( This won't have any negative effect on the engine I hope! )</font>

 

[ontheweb]

</font><font color="blueclass=small">( The application says to use one disc for each 3HP, so I should have needed 7 but since you buy them in paks of 3, I put all nine on. I've noticed no reduction in power, only less noise.

Phil )</font>

Hmmmm, the application I read on the Web said to use 1 disc per every 7HP, and you are using 9?

 

[Phils]

</font><font color="blue" class="small">( Hmmmm, the application I read on the Web said to use 1 disc per every 7HP, and you are using 9? )</font>

<font color="black"> It's one disc/7hp for the 5", and one disc/3hp for the 3". The 5" wouldn't fit on my PT without some major muffler mods. I wanted something simple.</font>

 

[pequeajim]

How did you fit it on with the square pipe coming out of the muffler?

 

[Phils]

Mine has a round pipe coming out of the muffler. I figured there have been enough different mufflers that I should show a photo of the one I have, but I didn't realize that ones like mine had a square final exit pipe too. Guess that's one of the fun things about the PT..... the ol' box o' chocolates from Forrest Gump.

Phil

 

[Phils]

Just an update. Finally tried out my new MIG welder this weekend and attached the SuperTrap permanently to the PT exhaust. When reassembling the SuperTrap I used the recommended discs (seven instead of the previously installed nine) and it quieted the little machine even more! No problem with power that I could notice.

Phil