SE218 (Replaces Most Mercury 3.0L Counter Rotation)
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Replaces Most Mercury 3.0L Counter Rotation Lower Units
Do not use for standard rotation
25 and 30 inch Shafts.
If you have an 8 Spline drive shaft you will need to buy the stub shaft unit
and purchase an upper driveshaft from an OE dealer.
25" 45-823901A 1
30" 45-824115A 1 (This shaft is no longer available from the OE. You will need to either source a used one or repair your old unit.)