I bought a box of model stuff last year at a flea market. One of the engines was an OK cub .049B . I loosened it up with a heat gun and some liquid wrench cleaned out the NV and it started right up. I have run 2 tanks through it and it's a neat little engine, it starts right up and I think it's pretty darn cute to boot. On the right side the casting must be a little thin because I think one of the threads cut through the case and it has a little leak there I found it when priming the engine when you prop it a little bit of fuel squirts out. You can hear it hiss a little bit when flipping the prop. I guess it has been like this for a long time as the castor goo was pretty thick in this area. It is wet there when it runs but it doesnt shoot out fuel. I don't know if I should live with it , try and seal it , or get another crankcase, I imagine I could put a little dab of JB there to seal it. I am going to put this engine on a Pee Wee Pup just for fun flying. T.J.

Wondering if the wrist pin floats free in the rod on this engine or if mine is castored tight, before I run it any more. T.J.

You may still be able to get spares from the maker. They were up and running at least until quite recently.

Got the engine from eBay the casting was much thicker than the original. Put it together and it runs fine. T.J. I