Hello!

I have a K&B 60 that was in a used Cub, and, after an hour of struggling, got it to run. It has plenty of power, but that's it. Quality is poor, stock muffler (oxymoron) continually loosened, and the idle was brutal. It's going in a boat or something, as I'd never trust one in the air after my experience with it. (Cub now has a OS FS-70, never gave me problems!)  

I do not own any other K&B engines, newer ones might be better, but most of our club avoids them.

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