2004 & UP Mercury 25" Optimax 2.07:1 Ratio Lower Unit 75 90 115 HP 1 YEAR WTY

• Opened & Professionally Inspected
• Fully resealed needs a water pump and pump gasket 
• Gearcase extension included
• 1 Year Mechanical Warranty in exchange for your core!

• Shifts and spins smoothly without binding
• Shafts checked for straightness
• Driveshaft splines show no wear 
• Gears & clutch are in great condition 
• Freshwater Condition
• New Impeller
• Fully Resealed & Pressure checked to 12 PSI

Gear Ratio: 2.07-1

Driveshaft splines: 13

Propeller shaft splines: 15

Driveshaft length from the top of the water pump to top of the shaft: 27-1/4"

Please add oil before use. This unit is shipped empty. 

This part is sold with a 1 year working warranty.  This warranty is upheld by Southcentral Outboards. If you need to use, or have any questions regarding this warranty, you must contact us directly.

Location: Southcentral Outboards, Altamont, Illinois

We have provided this cross-reference with the resources we have available in regards to fitment. This most likely will not fit every model for the years and horsepowers we have listed. We urge you to make sure this is the exact item you need by matching the part number to what is required for your motor. If you need help doing so, please contact us prior to purchasing and we would be happy to help!