A201 Mercury (lock nut, 8 spline shaft): 2 stroke: 6hp, 8hp, 9.9hp, 15hp/4 stroke: 9.9hp ('95-'04), 15hp Sea Pro/Marathon 10hp, 15hp
A205 Honda (8 spline shaft, not for 8 Classic, pin drive): 8 ('01 & newer), 9.9hp, 15hp, 20hp
A205 Yamaha (8 spline shaft, Type J propeller): 2 stroke: 9.9hp,15hp/4 stroke: 9.9hp, 15hp
A202 Evinrude/Johnson (13 spline shaft): 2 stroke: 9.9hp, 15hp ('74 & newer)/4 stroke: 8hp ('96 & newer) 9.9hp, 15hp ('95-'01)
A206 Evinrude/Johnson (10 spline shaft by Suzuki): 4 stroke: 9.9hp, 15hp ('02 & newer)
A206 Suzuki (10spline shaft, Type M propeller): DT 2stroke: 9.9hp ('83-'87), 15hp, 15C/DF 4 stroke: 9.9hp, 15hp
A207 Nissan/Tohatsu (14 spline shaft): 2 stroke: 9.9hp ('84-'05), 12hp ('85-'88), 15hp, 18hp ('85-'05)/4 stroke: 9.9hp, 15hp, 18hp
A207 Mercury (14 spline shaft by Nissan/Tohatsu) cotter pin: 4 stroke: 15hp, 20hp ('07 & newer)/Bigfoot 8hp, 9.9hp ('05 & newer)
My engine not listed, call me.