Eccentric
Mister Wizard
Those will probably fit the Mac 73/77 as well. I've been told by some of the old-timers that several saws could use the same spur
sprockets. I bought a huge lot of 200+ spur sprockets about three years ago from a retired saw shop owner that gave me a
fairly comprehensive list of what they fit. There were spurs in there for just about every gear-drive saw ever made, except for
the 090G. There were even .375" pitch spurs for the gear-drive Macs using the 19/32" stub shaft.
Very interesting. I've seen NOS McCulloch gear drive sprockets in the original McPackaging. "Will fit all McCulloch gear drive chainsaws except 3-25, 4-30, 47, 49, 73, 77" (or similar wording) was printed on the packages. They probably can be used on those saws, even though they're not the "right" part. Do you happen to have any. 404-8 Homelite 1100/1130/3100G sprockets?