Cacioa.... The term "Pinion" pertains to the gear in the lower unit which is attached to the driveshaft.


The gear that you are speaking of is a "Manual Starter Bendix Gear", or simply "Bendix Gear". The OMC part number for that gear is 318447 and cost approximately between $10 to $15.


It's not difficult to remove and install but the manual starter must be unwound before removing the retaining pin, otherwise the spring will unwind violently when the pin is removed. Good luck.