jimbo1490
ArboristSite Guru
Actually, the pawls are the same. I know what you mean about the same basic flywheel, but the 385 flywheel is heavier because it's part of an overall heavier reciprocating assembly (piston/crank/connecting rod.) A modified 385 with a lightened piston does quite well with the 372 flywheel as its' less resistance provides for faster acceleration. But the trade off is a lower volume of air movement at high speed, but that can mitigated with the modifications to the cylinder and muffler. However- the stock saws have different flywheels for a reason- because they're different saws intended for a different workload.
I have an unmolested 385xp carcass sitting on my shelf. It came in with a flywheel that looks EXACTLY like a 362-372 (or a 61-272 for that matter) in every respect including fin count and the thickness of the inertia ring. Husky may have changed up flywheels at some point, adding a more massive one or perhaps even reverting to the lighter one later; who knows. I just know that every 385 I've torn down so far (about 12 now) has had a flywheel that is identical to a 372 flywheel, even stamped with the same 503 51-15-0X part number family (as you likely know the last number in Husky's P/N system is simply the revision number).