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SE 216, 1.75:1, 25" Driveshaft
SE216 Replaces most
Mercury 3.0L Lower Units (SN 1B504989 and below). Does not replace the Torque
Master, Torque Master 2 or the Sport Master.
13 Spline one-piece
drive shaft.
and buy an upper driveshaft from an OE dealer.
25" 45-823901A 1
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).