Brent Nowell
Addicted to ArboristSite
tried to keep this one from being a hack job and took my time. Original hole was only about 5/8” or so, which I thought was plenty big enough. But works dried up right now, sitting at home trying to find things to do. Was looking at the 372 and a piece of 1” steel tubing and I was sure I could do a decent job on this.
Cut a small piece and studied the angle at where I wanted to place the pipe carefully. Will it be in the way? Will it plug the exhaust when it’s butted up to the bark?
So wanted to come in at the same angle as the original exhaust was shooting out and drilled a small hole. Used a uni bit (stepper bit) and finished the hole at an angle. It was pretty much the same outer diameter as the tubing.
Fitted the tube and found the angle way to high. So I shaped the bottom of the hole to lower the angle, after an hour I got it. Had a nice tight fit all round and began to sand off paint and fluxed surfaces.
Used brass flux coated brazing rods and a small cutting torch to do it. Torch is a 100$ oxy/map pos and it was extremely hard to dial it in. But once I got the proper flow of oxygen it was hot enough to get the rods melting really quick.
Cut the old slot off and filled the hole with some flat iron, brazed that too. Didn’t need two holes for two reasons. Noise and crap falling in.
Recessed the tubing about 1.5” back into the muffler to help with noise. More surface area inside to help absorb sound more.
Overall turned out really good. Angle is just right.
Used engine heat paint low gloss for finish, 3 coats. Stuck a heat gun up to the outlet on high setting and baked paint right on, worked great.
Saw responded very well, noticed right away that throttle response was much faster. I could never ever get this saw to have the same throttle response as the 395xp. No matter how hard I tried adjusting the low and throttle it always seemed to have just that ever so slight delay. And now it’s gone
Comments welcome!
Cut a small piece and studied the angle at where I wanted to place the pipe carefully. Will it be in the way? Will it plug the exhaust when it’s butted up to the bark?
So wanted to come in at the same angle as the original exhaust was shooting out and drilled a small hole. Used a uni bit (stepper bit) and finished the hole at an angle. It was pretty much the same outer diameter as the tubing.
Fitted the tube and found the angle way to high. So I shaped the bottom of the hole to lower the angle, after an hour I got it. Had a nice tight fit all round and began to sand off paint and fluxed surfaces.
Used brass flux coated brazing rods and a small cutting torch to do it. Torch is a 100$ oxy/map pos and it was extremely hard to dial it in. But once I got the proper flow of oxygen it was hot enough to get the rods melting really quick.
Cut the old slot off and filled the hole with some flat iron, brazed that too. Didn’t need two holes for two reasons. Noise and crap falling in.
Recessed the tubing about 1.5” back into the muffler to help with noise. More surface area inside to help absorb sound more.
Overall turned out really good. Angle is just right.
Used engine heat paint low gloss for finish, 3 coats. Stuck a heat gun up to the outlet on high setting and baked paint right on, worked great.
Saw responded very well, noticed right away that throttle response was much faster. I could never ever get this saw to have the same throttle response as the 395xp. No matter how hard I tried adjusting the low and throttle it always seemed to have just that ever so slight delay. And now it’s gone
Comments welcome!
