Mercury 1643-7406A31 Outboard Gearcase Lower Unit Long shaft 50hp 60hp 70hp 3cyl
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Mercury 1643-7406A31 Outboard Gearcase Lower Unit Long shaft 50hp 60hp 70hp 3cyl

$330.00
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Removed 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 50hp / 60hp / 70hp Mercury & Mariner Outboards from the 1984-1990 Make sure yours looks just like this. Item Condition and Notes: Good Working Condition Shaft Measures Roughly 21-3/4" From the top of the Water Pump housing to the tip of the drive shaft..... (See Pictures) This is the long shaft model.... Please measure yours to ensure you are ordering the right one. Shifts Correctly Original Paint Pressure Tested Yours should look like this one. Please ask if you are unsure if this part will work

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