RE: Any Opinion about K&B .48 ABC Engines
[b]MJD:
While the OS 46 FX is a fairly high revving engine, the K&B 48 is still running fine at speeds where the FX is running out of breath. Practically speaking, the K&B 48 can't be turned too fast.
There is a limit of course, but it's well above that of the OS.
Bill.