Just bought this saw brand new this past winter and don't have a ton of hours on it. Starts fine runs good, idles good until it warms up. Start it idles ok revs up cuts fine as soon as you go and let go of the throttle it will try and stall unless you can catch it by feathering the throttle which in a lot of cases isn't practical. I've messed with the carb screws a bit with not much luck. Could it be the clutch to tight? I've heard of it before that the clutch won't release at low rpm but? Another thing I've noticed is when you run it a while and shut it off then start it back up it likes to let go a heck of a blast out of the muffler. Does this all have to do, idle trouble and fire in the muffler the mega restrictive muffler on the saw? Time for a muffler mod maybe anyway?
Small air leak meebe? Loose decomp valve? Check the carb for being loose. Im no expert saw wrench im just saying check the simple stuff first.
The goofy thing that has me thinking is the backfire. I'm thinking electrical -- misfiring, shorts, out of timing. I'd check the plug wire and replace the spark plug. If that does not work. I'd look at the flywheel to make sure the key is OK and the saw is not out of time. Think back and see if it is now harder to start - like going to pull and the rope just stops - it's one of those moments where you may use profanity -- if so definitely timing.
Is it actually backfiring ,or is it loading up with fuel and causing a lot of smoke when it refuses ? Personally , if it's running right ,otherwise, I'd suspect the carb ,or carb settings as the culprit . Also, being as it is relatively new ,I'd run it by the dealer before opening things up ,unless you are comfortable with tearing into a saw . Rereading chipsflyins post ... I'd did have one saw that acted like that when I rebuilt it and it turned out to be a new Bosch plug . Drove me crazy for a while . In desperation ,I put the old plug in and it was fine .
I wouldn't go too deep without trying simple stuff. To me, it sounds like it is flooding (stalling out after cut, L too fat?) and then that gas is in the cylinder on the restart.
Did some research - looks like that is a problem with the 372's with the blue coil. With it running good when cold then problems when hot, the first thing that I look at is the ignition. If it has the black coil start with the plug.
Thanks for the input guys!!! Hoping to do some cutting this weekend so will have to tinker. As far as muffler mods on this saw anyone have any experience on the newer strato engine?
Nope, but just separate the halves, rip out any honeycomb crap and shoot for 80% of the exhaust size as new muffler exhuast hole size. Don't do the traditional front hole straight in the center, this likes to set wood on fire. Be sure to re-tune!!
Yeah not crazy about just blowing a hole in the front of the muffler myself although I do love the scent of two stroke and burning wood.
Xt's mufflers are an empty can. No need to split. Also rinse it out well when your finished. Don't want it to suck any shavings back into the cylinder.
A certain idjiot forgot to take a certain little turning device with him to the job Sunday Only had one muffler bark and never stalled it but had to tickle the throttle off the bottom while doing a bunch of limbing. She still runs good otherwise though!
