Muffler
- Thread starter Clarke
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BobRip
Elite Member
How does it sound?
Bob Rip
Bob Rip
This picture is the muffler I am replacing. I think it looks a little bit better in the photo then it does live. My machine is the model with the fuel tank as part of the hood and the muffler under the hood with a space shuttle type cover over it. My machine has 200 hrs.. The muffler is $138.00 plus shipping.
I installed the muffler this evening and mowed till dark. Until the muffler failed I never gave the temperature these mufflers run at any thought. After an hour of mowing you can see the whole muffler glowing cherry red, even the exhaust pipes connected to the engine.
IMO there may be a problem with these mufflers. Is the exhaust gas temperature on the Kohler engines supposed to run hot enough to semi melt the muffler. Is the high EGT damaging the engines..
IMO replacing this expensive muffler will be an on going problem
sg /forums/images/graemlins/confused.gif
I installed the muffler this evening and mowed till dark. Until the muffler failed I never gave the temperature these mufflers run at any thought. After an hour of mowing you can see the whole muffler glowing cherry red, even the exhaust pipes connected to the engine.
IMO there may be a problem with these mufflers. Is the exhaust gas temperature on the Kohler engines supposed to run hot enough to semi melt the muffler. Is the high EGT damaging the engines..
IMO replacing this expensive muffler will be an on going problem
sg /forums/images/graemlins/confused.gif
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pajoube
Veteran Member
- Joined
- Oct 11, 2001
- Messages
- 2,225
- Location
- Montana (Near Bozeman)
- Tractor
- Former Owner PowerTrac 425 (September 2003)
I think I have the same muffler on my 425 as you do. I have almost 400 hours and to my knowledge no problems. Should I be looking for cracks? excessive vibration? or what?
PJ
PJ
MossRoad
Super Moderator
- Joined
- Aug 31, 2001
- Messages
- 57,913
- Location
- South Bend, Indiana (near)
- Tractor
- Power Trac PT425 2001 Model Year
Wow. That is cooked good. What type of fuel are you running? Just curious. We run regular old 87 octane in ours, but we have the Kohler muffler, not the custom one in our 2001 model PT425.
I purchased my machine March 2004, so I guess its a 2004 model. The muffler is insulated with high temp insulation, I guess to make sure it stays as hot as possible. I noticed the muffler was loose during a pre-use inpection and found both exhaust connections broken off at the muffler due to what looks like heat exhaustion. Since the muffler is insulated I can only inspect the two small exhaust pipes.
Is your muffler insulated and placed under the hood.
sg
PS: I forgot to mention it is a PT425
Is your muffler insulated and placed under the hood.
sg
PS: I forgot to mention it is a PT425
smartguyz
Gold Member
- Joined
- Mar 16, 2003
- Messages
- 488
- Location
- Beaverton, Oregon
- Tractor
- JD318, Power-Trac PT425 with scuffed-up green paint.
Hi Guys,
I have the 'intermediate' design that SnowRidge has - it has MossRoad's layout, but the muffler is a custom one. When I saw the design changes with the fuel tank in the hood, I called and talked to Terry Estep at PT. He said that the muffler wrap was designed to help keep under-hood temps down. It looks like what it does is trap all the heat inside the thermal blanket, and is causing premature failure. I haven't noticed anything particularly unusual about the wear my muffler is experiencing. It looks nearly brand-new, except for some minor heat discoloration, which is normal. I suspect that moving the fuel tank to integrate with the hood has caused some problems associated with needing to keep the heat down in the engine bay (to avoid heating the fuel tank, I assume). The thermal wrap does help to localize the heat to stay within the muffler, but at the cost of premature muffler wear.
Although I am sorry to see this apparent deficiency in the new design, I am happy that PT is continually trying to make things better. Perhaps this particular layout has some problems.
Sincerely,
Rob /forums/images/graemlins/grin.gif
I have the 'intermediate' design that SnowRidge has - it has MossRoad's layout, but the muffler is a custom one. When I saw the design changes with the fuel tank in the hood, I called and talked to Terry Estep at PT. He said that the muffler wrap was designed to help keep under-hood temps down. It looks like what it does is trap all the heat inside the thermal blanket, and is causing premature failure. I haven't noticed anything particularly unusual about the wear my muffler is experiencing. It looks nearly brand-new, except for some minor heat discoloration, which is normal. I suspect that moving the fuel tank to integrate with the hood has caused some problems associated with needing to keep the heat down in the engine bay (to avoid heating the fuel tank, I assume). The thermal wrap does help to localize the heat to stay within the muffler, but at the cost of premature muffler wear.
Although I am sorry to see this apparent deficiency in the new design, I am happy that PT is continually trying to make things better. Perhaps this particular layout has some problems.
Sincerely,
Rob /forums/images/graemlins/grin.gif
Your are right. I also think the design is deficient. I was thinking about fabricating a stainless steel header pipe that would move the muffler to the outside. This would solve the problem. But!! why should I have to do that shouldn't the machine be designed to be reliable.
How many PT owners think the manufacturer will step up to the plate and do the right thing. I have been dealing with equipment manufacturers for years and I have never had one do the right think unless they were forced to do it .
sg
PS: It gets hot enough that it is deteriorating the insulating cover. I will most likely have to replace the insulation along with the muffler the next time.
How many PT owners think the manufacturer will step up to the plate and do the right thing. I have been dealing with equipment manufacturers for years and I have never had one do the right think unless they were forced to do it .
sg
PS: It gets hot enough that it is deteriorating the insulating cover. I will most likely have to replace the insulation along with the muffler the next time.