tek9tim
ArboristSite Guru
First, a little background; I've been rebuilding Stihls for about 15 years. Can do a top end swap on a pro saw in less than 30 minutes. (using a drill with a t27 bit) I seriously have no idea how many saws I've done top ends on. I do my own port work. But, I have never touched one of the god awful homeowner saws with a plastic crankcase. Until last night.
A guy I work with somehow melted down his 391 just days outside warranty. I thought I'd help him out and put a new piston and cylinder on for him. I won't make that mistake with a homeowner saw again.
I need to know the tricks for this saw. In particular, the reassembly. The trouble I am having is the intake port on the saw is not close to lining up with the hole through the back of the carb box, making it impossible to bolt the intake boot on. I can't figure out how to get the carb box off all the way, or even loose enough to move around since it isn't attached to the gas tank like on a respectable saw.
I have this to say: the 391 is an absolute piece of crap. I had this opinion before, but that was just based on pro saw bias. I can now say that this saw has an absolutely horrible design that completely precludes service. If you are thinking about buying this saw, kick yourself in the crotch and buy a used pro saw instead. If you just have to buy something new, buy a real saw.
A guy I work with somehow melted down his 391 just days outside warranty. I thought I'd help him out and put a new piston and cylinder on for him. I won't make that mistake with a homeowner saw again.
I need to know the tricks for this saw. In particular, the reassembly. The trouble I am having is the intake port on the saw is not close to lining up with the hole through the back of the carb box, making it impossible to bolt the intake boot on. I can't figure out how to get the carb box off all the way, or even loose enough to move around since it isn't attached to the gas tank like on a respectable saw.
I have this to say: the 391 is an absolute piece of crap. I had this opinion before, but that was just based on pro saw bias. I can now say that this saw has an absolutely horrible design that completely precludes service. If you are thinking about buying this saw, kick yourself in the crotch and buy a used pro saw instead. If you just have to buy something new, buy a real saw.