Have you checked the compression gauge in a known good engine?
60 psi is pretty worn sounding.
I would want to see at least double that number.
140 or more, would be better or it will struggle to get to full rpms.
Since you say it's "well worn" I'd figure at least a ring job and perhaps a fresh piston.
Have you removed the muffler and looked into the exhaust port for any scoring or other damage?
You need look for any cylinder or piston damage before spending any more money.
The recoil may have taken a beating from people yanking it hard
due to that low compression.
What shape is the rest of the blower in?
Any cracked or broken parts.
Leaking fuel anywhere or damaged fuel tank.
Stripped bolt/screw holes.
crushed air pipes or elbow worn at the housing, etc.
throttle controls or cables.
