Gear Set 3.0L
12/21 or 1.75:1 Ratio
Includes Forward, Pinion & Reverse gears, shims, various orings and a new pinion nut.
Mercury / Mariner
200hp 3.0L DFI with serial number OG438000-OT408999
225hp 3.0L Carb, EFI, DFI with serial number OG438000-OT408999
250hp 3.0L Carb, EFI, DFI with serial number OG438000-OT408999
May fit additional models to those listed above. Compare the oem part number of the part for your engine to those listed below.
OE 43-859321A3, 43-859322A1, 43-828168A2