andrethegiant70
Addicted to ArboristSite
ok i got a poulan 295 muffer the one that comes apart ,,do i take the screen off the difusser and drill more holes, and what about the adddional hole i am suposed to drill in the muffler ,in the side or front HELP, :greenchainsaw:
I like the 295... I always think of it as a big-bore Husky 41. The aesthetics are different as are the linkages, but the engine itself is outwardly identical along with filtration, oiler, muffler, and other odd details. With your muffler mod, the 295 will cut very nicely and still be light as a feather. They put a number of different mufflers on that saw over the years, but it sounds like the one you have is the one that, once you take the bolts out, falls in half and has a central "stalk" surrounded by a spark arresting screen. I have never felt that baffle is a bottleneck, so I've never modified them. I believe the restriction on this muffler is merely the outlet on the side. Normally what I do is pry at the hole to spread the metal. It's easy and you get modest but discernable gains. If you want to go bigger, you probably need to grind, but you might have to come up with a deflector of some sort so you don't melt your chainbrake (if it is a newer chainbrake model). The rule of thumb for the size of the outlet hole (though this has seen much debate) is to keep it to less than 80% of the exhaust port (measured at the piston). That's a heck of a lot bigger than the existing hole... I don't get near that number and I'm pretty happy with the way the saws run.
Yes, these saws are a bit "plasticky," but the engines are sturdy enough to port if you are keen to do it.
Oh, remember to retune to a richer setting after opening up your muffler! The clamshell style engines don't handle heat as well as the magnesium case engines. Without retuning the saw will rev to the moon and produce a lot more heat.