MerCruiser 43-59832A2 Upper Unit Gear Set V8 305 350 1.50:1 Alpha One Gearcase 7.5hp 7-Wires (Going into Plug) 7

7-Wires (Going into Plug) 7 coming from big round plug

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

There is some material missing on this and a small crack in the rubber (see last pictures) you could use that liquid electircal tape

14-816629 Propeller Nut Tab Washer

5L from the 1970-1982 time period where it used the type of exhaust manifold where it had the aluminum cover mount for the carburetor)

MerCruiser 43-59832A2 Upper Unit Gear Set V8 305 350 1.50:1 Alpha One Gearcase 7.5hp 7-Wires (Going into Plug) 7Item 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