Chainsaw Repair

My exposure early on was with my uncle who was in the sawmill business . . .

In the early 50's big pine (SYP) and hardwood timber was the rural scene. Crosscut two man hand saws were still very common in 1950. That was soon to change . . .

Most of my commercial exposure to chainsaws in the mid 50's and very early 60's was loblolly pine pulpwood oriented. So I was not around so much of the real big saws. The short pulp wood industry seemed to thrive in the later 50's and early 60's. Then began to transition to the full length small pine whereas a small amount of pine lumber was rendered for the treated wood business and the rest of the tree was chipped for paper and and eventually transitioned into the OSB plywood business. Major chip buyers were International Paper and Georgia-Pacific. The wood harvester/processor developed in this industry to the eventual demise of the hand held commercial chainsaw business. My next door neighbor was a regional representative for Lombard and serviced saws on the week ends.

Though I was around several of the 47 to 82 power products powered Lombards. There were some Homelite powered Lombards in the late 50's also.

Every Lombard & Homelite I was around was the old bunched up style with the cylinder vertical or slanted forward and had a bow bar (like a 5 series).

The tear down, porting, and rebuilds of Macs experience was with MC10 & MC20 Kart engines.

According to the shop manual 105-110 inch pounds,oiled bolt .However according to SAE on grade 8 bolts 10-32 it's 62 inch pounds.They might be a higher grade than 8 though .

It's a hard bolt going into a sintered metal rod so the higher torque might apply .Trivia:the "**** rod " was developed by McCulloch motors and is standard practice today on most automotive engines .

If the gasket is a little stiff sealant is okay .If it's supple,in my opinion it doesn't need sealant .

Thanks!

Hi Al, long time no see. How you been and how many 125's do you have now?
 Btw, I wore out my hoof rasp! Lol
John

Hi Al, long time no see. How you been and how many 125's do you have now?
 Btw, I wore out my hoof rasp! Lol
John

Just two John .As far as rasps I haven't laid the die grinder to a saw cylinder in a while myself .I really did do one with a file and it worked .Kind of a pain in the butt though .

One of mine had a solid state igniter with an off set  key to advance the spark .The modual went bad but as luck would have it the points were still there .

I prefer points myself .Fact when I hooked the points back up I kept the off set key and mavericed the points to jack the timing a couple of degrees from the stock 26 advance to maybe 29 advance .It improved it slightly .It starts right up but you don't want to patty cake it .Pull it over with gusto because 123 CC coming back on you can about jerk your arm off .