Buying used glow engine
How do I go about buying a used (and elderly) K&B .40? In a few days from now, I will be over at the residence of old friend's place looking over his stock of old glow engines. I have a need for one of the older K&B .40 of the 1960's, the type with a baffled exhaust port, no muffler. Eight bolt crankcase, and stud type prop shaft.
The son isn't too solid on condition, but he and some expert went and made an assessment for valuation from an estate. Before I agree or not to the selling price, I'd like to know (perhaps) what failed or wore out before ultimate age on these. Compression is springy, but then again I see what looks to be scars on the piston. Maybe a loose conenecting rod. The son assures me a rod will tighten up once hot, and long as there is sufficient compression it will fire off good.
What do I look for?
Wm.