MerCruiser 43-59832A2 Upper Unit Gear Set V8 305 350 1.50:1 Alpha One Gearcase 7.5hp 390441 / 0390441 / 432453

390441 / 0390441 / 432453 / 0432453 / 324599 Knob & Tilt Pin Assembly

Complete Swivel Steering Bracket Transom Assembly (Notable parts included) 317664 / 0317664 Steering Bracket Assembly

14-816629 Propeller Nut Tab Washer

Compatibility by year: (this is based on my research and the OMC parts diagrams) 1987: All Models

MerCruiser 43-59832A2 Upper Unit Gear Set V8 305 350 1.50:1 Alpha One Gearcase 7.5hp 390441 / 0390441 / 432453Item Details The gears are For All V8 applications for Pre Alpha R MR ALPHA ONE Gen 1, so 1970 1990 as a general rule. (You may need to replace the bearing on top of the shaft depending on whether you have a 1970 1982 vs 1982 & Up application as they each used different bearing sizes) These were also used on Gen II drives 1991 1997 but you would have to swap out the shafts and bearings The gear set here is MerCruiser 43 59831 & 43 59832 > 43 59832A2