Hi. I'm relatively new to chainsaw repair, as well as to this forum. Would appreciate some advice.
My neighbor has given me an old Homelite Super XL. (UT is 100453, SN 481950112. No other model markings - as per evident practice with HL.) Last used over 2 years ago. So I flipped the switch, choked it, and pulled the cord. Very tight on the first couple of pulls, then looser. Then, on about the 10th pull, a scratchy noise became apparent on every revolution. (Didn't start, or even fire, btw.) I quit trying to start it. Maybe dirt fell into the cylinder from the exhaust manifold?
I'm not a small engine mechanic but am capable, and have a box of tools. So I started to take it apart. The seemingly obvious approach is to remove the carb housing. As I eventually learned, you need to remove the carb from the housing first.
Along the way, in frustration, I tried to break in via other routes. Removed the starter rope housing, OK. But flywheel removal is a puzzle. Maybe I need a puller to get closer from that direction.
Flipped 'er over. Removed chain and bar. Got the right handed nut off, and the clutch cap. Figured the OFF --> printed on the clutch body/wheel meant a left hand thread. Ginned up a 1 x 2 with a nail to poke into one of the three holes in the clutch body. Using the stick for leverage, and a bit of clothesline in the spark plug hole, got the clutch body off. Now I could see four hex bolt heads that hold the clutch housing to the crankcase. Got them out. (The clutch body had been in the way...) Still, the clutch housing wouldn't come off, even though it would rotate slightly around the drive shaft, since there is a bearing on the shaft inside the clutch box. Tried to remove the bearing assembly (held on with three machine screws), to no avail; I suspect that it is pressed onto the shaft.
Back to the carb approach. Took out the guts, and got the carb box - attached to the trigger handle - off. Dealt with the copper tube that ports bar oil around. (Who knows quite why - I don't yet.) Took off the muffler, and can view the exhaust port. So now 3 of 4 head bolts are accessible. But the last one, down and to the right as viewed from the trigger, would be verrry difficult to remove. The base plate of the saw, which seems integral to the crankcase, is in the way. And it is held on by a sequence of screws that seem to hold two halves of a clamshell together. But half of those screws are impossible to reach with a screwdriver because the clutch housing is in the way.
Best I can figure, the factory pressed the main shaft bearing that resides in the clutch housing after the rest of the saw was assembled. ?
Now, I read that other chainsawyers often replace pistons in their saws, and even cylinders. (I'm not sure, but it sounds like they also sometimes modify the head ...?) So evidently, on most saw models, there is a way to get the head off.
What am I missing? Or do I just need to worry that last lower right bolt out of its hole?
Advice, or a link to detailed instructions or to an appropriate forum thread, highly appreciated.
Thanks in advance,
giarcea
(aka Alan)