hi all  i am running a st 46 and hope to be soon using a st v60. question is what is the best type of muffler to run on these engines tongue or tube. i have heard by some that tongue mufflers cause to much heat inside these motors which can lead to the ring wearing out quicker ?. i want a muffler that gives good power is light and gives long ring life with a good engine note .thanks damien

Hi Damein

I alway prefer to use a  good  tube  muffler  over a  tongue, The main reason I would use a tongue muffler is  strickly a  weight issue.  other than that  I would recomend a good tube  muffler.
The  tube mufflers most alway have a deeper  smoother  sound, and have more expansion area than a tongue does.
Both have their use and place  but I really think  you would be better  served using a tube muffler on the  ST60

Regards
Randy

The tube does seem to be the best choice! 
So far, I have always followed Randy Smith's recommendations to the letter.  When he talks, I listen! 

As an aside, I have always followed the engine builder's recommendations for what ever engine I am using.  Most of my engines are from Randy or Tom Lay.  Both have been perfect in their recommendations, and I have had the same experiences with Byron Barker. 

The Aero Products and Scott Dinger tube mufflers are the very best out there, IMHO.