BenC
ArboristSite Lurker
I've got a Baumr Ag SX92 which turns out to be a Husky 372 clone. It's done plenty of work over the past few years, but I'm now stuck scratching my head over a particular problem.
4-5 times it's died on me and on pulling it down it looks like it has eaten a small piece of hard metal, which has bounced around making indentations in the piston and sometimes scoring the piston (see pics below) and causing the ring to seize. Thus the saw loses compression and stops. Once or twice I've found something embedded in the piston and it looks like a small section of piston ring, or circlip. But after checking everything over I never find any missing screw or broken parts. It's an absolute mystery to me what the foreign material is. And yes, the air filter is still there.
If I free up the ring and smooth things out it'll run again fine. Sometimes for a few hours, sometimes for a few months. This time I split the cases to check the crank bearings and they looked fine (replaced them anyway). But I am still stumped as to what is causing this.
Does anyone have any suggestions as to what the cause might be?
Thanks
4-5 times it's died on me and on pulling it down it looks like it has eaten a small piece of hard metal, which has bounced around making indentations in the piston and sometimes scoring the piston (see pics below) and causing the ring to seize. Thus the saw loses compression and stops. Once or twice I've found something embedded in the piston and it looks like a small section of piston ring, or circlip. But after checking everything over I never find any missing screw or broken parts. It's an absolute mystery to me what the foreign material is. And yes, the air filter is still there.
If I free up the ring and smooth things out it'll run again fine. Sometimes for a few hours, sometimes for a few months. This time I split the cases to check the crank bearings and they looked fine (replaced them anyway). But I am still stumped as to what is causing this.
Does anyone have any suggestions as to what the cause might be?
Thanks