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90-221-A20 - SE221 Lower Unit Mercury 3.0L V6 2-stroke, 1.75:1, 20 inch, Standard Rotation

SEI Marine 90-221-A20 - SE221 Lower Unit Mercury 3.0L V6 2-stroke, 1.75:1, 20 inch, Standard RotationSEI Marine 90-221-A20 - SE221 Lower Unit Mercury 3.0L V6 2-stroke, 1.75:1, 20 inch, Standard Rotation

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$1,495.00

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Part Number
90-221-A20

Manufacturer
SEI Marine

 90-221-A20 - SE221 Lower Unit Mercury 3.0L V6 2-stroke, 1.75:1, 20 inch, Standard Rotation 

3.0 Liter – V6 – 2-Stroke Standard or Fleet Master Gearcase with 13 spline drive shaft and 15 spline prop shaft

NOTE: You must confirm that your original gearcase has a 15 spline PROP Shaft.

SE221 does not replace some of the optional gearcases that were available including Torque Master, Torque Master 2 and the Sport Master. These units all have the “Fat Shaft” prop shaft with 19 splines.

The SE221 units are “Verado Style” gearcases. The SE221 is considered the Standard  gearcase and may also be referred to as Fleet Master. Around 2006, these engines changed from using  SE216 units to SE221 units. This changed occurred at serial number 1B504989. 

 

 

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SEI Marine 90-221-a20 - Se221 Lower Unit Mercury 3.0l V6 2-stroke, 1.75:1, 20 Inch, Standard Rotation is equivalent to parts:

  • 880686T29 Mercury Marine
  • 80986A43 Mercury Marine
  • 1600880686T29 Mercury Marine
  • 160080986A43 Mercury Marine
  • 1600-880686T29 Mercury Marine
  • 1600-80986A43 Mercury Marine
SEI is the largest manufacturer of aftermarket sterndrives and outboard lower units in the world. Every SEI complete gearcase and outdrive carries a 3-Year No-Fault Warranty.

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