OS 25F ABC another blast from the past!

The OS 25F ABC engine was released to the market in 1982 and a review can be read here. http://sceptreflight.net/Model%20Eng...8F%20Heli.html I bought this engine from Ebay about 1 week ago. It was advertised as "bench run only for break-in purposes". Nothing more than that. When it arrived it would not turn over at all. The exterior was excellent and did look to be a very low time engine. As standard I took it apart to determine the condition of the inside and free it up. The top of the piston had no carbon build up at all on it confirming the low run time. There was little evidence of running inside, no excessive residue or rust, It looked quite nice. The one or two runs it had were just enough to, over time, freeze the parts in place. Once freed up the engine turned over smoothly and the bearings felt nice. I lubed it up and decided to give it a run. As typical with OS engines of this era, it is a fantastic running engine. Hand starts are easy and was tuned transition from idle to WOT is quite nice. Take a look.