I recently bought a NIB K&B 40 control line engine, there are no operating instructions with it. The box has the number 4055 C/L on it, I have looked thru the K&B information at the MERCO site but cannot find anything on this 4055 engine. I've reached out to them but they are slow. I'd like to know if it is the older style steel engine that must have a high castro oil fuel similar to the old Fox engines or is it the newer style mixed alloy engine that uses a synthetic blended fuel. Looking into the exhaust port it has a ringed piston. Is a ringed engine reliable, what's the best method to run it for the best longevity? It's a beautiful engine but a little beefy compared to my OS LA 40 or my OS 40 FP engines and weighs a couple ounces heavier. I haven't found much written about it, is this a good engine? What about it's power and how does it compare to a 46 size or larger engine? Is it a good performer and where is it best used?
If anyone has the break in and operating instructions I'd appreciate getting a copy from you. Any information regarding the performance I can expect would be good to know, K&B MERCO shows two 40 size engines which are presently not available?? Is this a boat anchor, I didn't pay a lot for it, it came by way of an estate sale.
Will appreciate your input,
Steve