RE: How to rejuvenate a long stored OS 1.08 ?
Junk/varnish stuck to the sleeve will cause overheating too. Varnish can build up on the sleeve and when the motor gets hot, the varnish gets sticky causing the engine to overheat. I had OS .46 that did this every 2-3 gallons of fuel. If it doesnt burn out, take a piece of 400 wet-or-dry wrapped around your finger and oil the sleeve up. Then while twisting your finger, run the sleeve up and down until you can see faint sanding marks. Some guys have used brake cylinder hones, but I was always afraid that it would remove too much material too quickly.