SE205 (Replaces Most 3 & 4 Cylinder Mercury OB)

SKU: 90-205
$895.00
SE205 (Replaces Most 3 & 4 Cylinder Mercury OB)
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SE205 (Replaces Most 3 & 4 Cylinder Mercury OB)

SKU: 90-205
$895.00

Replaces most Mercury 3&4 Cylinder 2-Stroke 1987 and newer 70-125 HP
Also replaces most 75-115 HP 4-Stroke below Serial #OT801000.
This unit will not replace a 3 jaw lower unit unless you also change the shift shaft in the midsection. 

It is best to call us with the serial number so we can confirm fitment before ordering.

  1. Replaces most 3&4 Cylinder 2-Stroke 1987 and newer 70-125 HP
  2. Also replaces most 75-115 HP 4-Stroke below Serial #OT801000.
  3. This unit will not replace a 3 jaw lower unit unless you also change the shift shaft in the midsection.Click Here for shaft installation instructions.
  4. This unit will only work if you have a 4-1/4 bullet diameter.
  5. This unit will not replace models with a plastic water pump housing.
  6. You must verify your Gear Ratio. See Table 1 Below
  7. 2.31 ratio is no longer available. 2.33 is the proper replacement.
  8. You must verify your engine type, Two Stroke Carb, DFI (Direct Fuel Injection), or 4-stroke.
  9. You must verify your shaft length. See Figure 1 below.
  10. Your model # can also tell you the shaft size. An L is a 20" and an XL is a 25". If in doubt, please verify.
  11. There is also an LL model which is a 22.5 Inch Shaft. We do not offer this shaft size.
  12. If you have any questions about your application, please call us at 813-925-7127 with your engine serial number.
Application text
All SEI Outboard Lower Units come with a fully transferable No Fault Warranty for 3 Years.
To read full details and possible exclusions click on "Warranty Policy" below.

WARRANTY POLICY