This is a brand NEW aftermarket / replacement  PINION NUT SPEC'L SHAPE (LOWER CASING DRIVE) fit some For YAMAHA OUTBOARD F 20, 25, 30, F45 horsepower (2 or 4 stroke) engines.

Fit For YAMAHA Outboard part number: 90179-10M14-00 (IMPT: check OEM part number before purchase!!)

Fit For PARSUN MAKARA Outboard part number: F25-04000006

T30 2 stroke