Gear Set Upper Unit for Mercruiser 1.50 1.47 20/22 1974-1997 43-18411A2

Heavy Duty Gear Set for a Mercruiser #1 1974-1982, Alpha 1 1983-1990, and Gen 2 1991-1997 sterrndrives.

It contains the drive gear, the driven gear, and the Lower Driven gear Bearing.

They have 20/22 tooth count or 1.50 or 1.47 Gear Ratio and were used with most V8 engines.

They will fit the following applications: MC-1, R, MR, Alpha One, and Alpha One Gen. II (1974-97).

Replaces Mercury Quicksilver # 18411A2