Picked up an earlier 77 on the thrift. Sat neglected for years.
Didn't need too much to get it running. New lines, diaphragms massaged a bit and a new sprocket. Great compression and clean piston. It cuts wood now.
Needs the bigger spike. I'd take a template if anyone has one.
View attachment 804490
Nice , I'm still in the process of finding an air filter cover for mine.
Mine was given to me from a scrap pile,but like yours the piston and cylinder look great and has no problems holding itself by the starter cord.