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90-205-A20D - SE205 Lower Unit Mercury 3 and 4 Cylinder, 2.07 to 1, 2 Stroke, DFI, 20 Inch

SEI Marine 90-205-A20D - SE205 Lower Unit Mercury 3 and 4 Cylinder, 2.07 to 1, 2 Stroke, DFI, 20 Inch

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$1,095.00

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Part Number
90-205-A20D

Manufacturer
SEI Marine

See Recommended Installation Components below.

90-205-A20D - SE205 Lower Unit Mercury 3 and 4 Cylinder, 2.07 to 1, 2 Stroke, DFI, 20 Inch

 2.07:1, 20 Inch Driveshaft DFI. Replaces  Original number   1667-9011J33

  • Part Number: 90-205-A20D
  • Covers Models: DFI 75-115hp
  • Type: L
  • D/S Measures: 23”
  • Spline Count: 13
  • OD of Spline: .873”
  • Length of Spline: 1.635”
  • Gear Ratio: 2.07:1
  • Gear Teeth Count: 14 - 29

Replaces most Mercury 3 and 4 Cylinder 2-Stroke 1987 and newer 70-125 HP

Also replaces most 75-115 HP 4-Stroke below Serial #OT801000.

IMPORTANT NOTE: For applications of 75HP and above, this unit will not replace a 3 jaw lower unit unless you also change the shift shaft in the midsection. See the Mid Section Shift Shaft Kit in related parts below.

Applications of 70HP and below do not require the kit when replacing a 3 jaw lower unit.

IMPORTANT NOTE: See the chart at the TECH INFO Download link above for important driveshaft reference information.

Technical information (PDF)
Warranty (PDF)
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SEI Marine 90-205-a20d - Se205 Lower Unit Mercury 3 And 4 Cylinder, 2.07 To 1, 2 Stroke, Dfi, 20 Inch is equivalent to parts:

  • 9011J33 Mercury Marine
  • 1667  9011J33 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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