Mercury 1643-7406A31 Outboard Gearcase Lower Unit Long shaft 50hp 60hp 70hp 3cyl Steering Helm Parts Compared to some similar things

Compared to some similar things I've sold in the past this might be a little bent

Used from 1963-1998 on virtually all OMC Cobra / Volvo Penta GM 3

Aluminum Thermostat Housing 55132 > 55132A5 > 55132T

The shorter type (45597A1 was used on 120hp applications)

387656 / 0387656 Thrust Bearing

Mercury 1643-7406A31 Outboard Gearcase Lower Unit Long shaft 50hp 60hp 70hp 3cyl Steering Helm Parts Compared to some similar thingsRemoved from a Mercury Outboard 50hp Inline 3 Cyl. cylinder Two 2 Stroke (6428681 0B122929) Part #'s Lower Gearcase Assembly 1643 7406A31 (Housing Stamped 1643 6458) Functionally Equivalent to the Following Numbers: 1643 9539A3 1643 7406A42 (Mariner) 1643 9539A9 (Mariner) Related Gearcase numbers (Not related to shaft length) 1643 7406A16 1643 7406A41 1643 9539A1 1643 9539T1 1643 9539A8 1643 9539T8 Compatibility Generally found on the 3cyl 2 stroke