OK. SP, et al, here it is. All I needed was a new fuel hose, pickup body, gear sprocket, and chain drive sprocket. A hairline radial crack in the fuel hose eventually opened up. Replacing that was helped with a little lube. Then I mounted a low-profile 50 DL, .050" gauge, 3/8" pitch chain and a 14" Woodland Pro Arbormax bar on it. The engine started immediately and only needed a slight carb tune up:
View attachment 880847This bar would not accept a 50-DL chain, and could tighten only a new 52-DL chain, which was a bit disappointing. The ideal chain length for this bar is a 51-DL, but I would knock out a cutter only if it stretches beyond the tightener's limit. A typical Stihl 14" top-handle saw bar would work fine with a 50-DL chain.
Regardless, it was a pleasure working with an all-metal saw that has almost no plastic on board except for the pull cord handle, the trigger, etc. I imagine it weighs a pound or two more than today's MS192 or MS200 top handle saws. The new 3/8" pitch sprocket I found is an "out-of-the-box" Oregon that had minimal wear, circa 1984. I estimate this saw has 40 years under its belt, but it has no trouble cutting hardwood branches with this setup.
BTW, in some respects it was a godsend that I did this custom restoration because the gear sprocket for 1/4" pitch chain crumbled into pieces and fell apart as I removed it. I'm not sure how it worked at all. I thank you for yours and PioneerGuy's encouragement. No doubt, this is a great hobby.