Mercury Lower Unit Replaces Some Mercury 3.0L Outboard

Available with a 20, 25, or 30 inch (13 spline) 1 pc. driive shaft.

If you have an 8 Spline drive shaft, you will need to buy the stub shaft unit
and buy an upper driveshaft from an OE dealer.
20″ 45-824114A 1
25″ 45-823901A 1
30″ 45-824115A 1 (This item is no longer available from the OE. You will need to source a used one or fix your old drive.)

If you have a 13-spline two-piece shaft, just purchase the appropriate
one piece shaft from the drop-down box above.
The SEI 216 gear cases are supplied with the correct water tube coupling for units with a serial number of OG438000 and higher. If your unit has a lower serial number, you will need to use your old water coupling or buy the correct part (SEI part number 96-116-12K).

Please scroll down for related items.

If you need application assistance, please call 813-925-7127 and have your engine serial number available.