Mercury 3 Cylinder and 4 Cylinder Outboard Lower Units

• Mercury 3 Cylinder and Mercury 4 Cylinder Outboard lower units replace most 3 & 4 Cylinder Mercury 2-Stroke 1987 and New 70-125 HP.
• This unit will not replace a 3 jaw lower unit unless you also replace the shift shaft in the midsection.
• This unit will only work if you have the 4 1/4 Bullet Diameter.
• This unit will not replace units with a plastic water pump housing.
• Brand new with a 3 year fault free warranty
• NOT REBUILT

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  • You must verify your Gear Ratio. See Gear Ratio / Cross Reference
    
  • 2.31 ratio is no longer available. 2.33 is the proper replacement.
  • You must verify your engine type, Two Stroke Carb, DFI (Direct Fuel Injection), or 4-stroke.
  • You must verify your shaft length. See Shaft Measurement Example Below
    
  • 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.
  • There is also an LL model which is a 22.5 Inch Shaft. We do not offer this shaft size.
  • If you have any questions about your application, please call us at 423-213-4471
    

Gear Ratio / Cross Reference

Shaft Measurement Example

INSTALL KIT IS AVAILABLE (New Nuts and Washers to Install the unit)

Anode Kit is Available - New Zinc Fin and Blocks that attach to the unit to prevent corrosion.