Perkins 4.108 shaft rotation

[KeelHaulin]

I don't know. Nomenclature on what is "standard" is that RH (clockwise) is standard (IE Chapmans Piloting/Seamanship). But maybe that's prop rotation direction; not engine rotation.

I can't recall if my 4.108 engine is LH or RH; but at the shaft it definitely is RH rotation coming out of the transmission.

[capttb]

You are correct KH, right handed prop rotation is so prevalent that it could be considered standard. The darn engineers created the LH, RH engine confusion by using a naming convention that addresses the flywheel end of the crank. Hence, a "standard rotation" engine becomes Left Handed and a "reverse rotation" becomes right handed which seems a bit strange.