1991-2006 Mercury 20" Lower Unit 50 55 60 HP 1.87 Gear Ratio 1 YEAR WARRANTY

• Fully Resealed with a new impeller!
• After oil instillation, it is ready for use!
• 1 year warranty in exchange for your spinning core!

This lower unit is in excellent condition.  All of the splines are in great condition with just slight wear on the driveshaft splines. The unit's oil was clean and free of metal and water. The shafts are straight and shift/turn smoothly with no binding.  We installed a new impeller and this unit was resealed and pressured checked. The paint has been touched up, and appears to be in good condition. The skeg has been repaired, please see pictures. There are holes driled in the cavitation plate for a planing fin, please see pictures. Please note that this lower unit does not come with the trim tab, the propeller or the propeller hardware. 


Driveshaft length: 21-9/10
Driveshaft splines:11
Propeller shaft splines: 13


Please remember to add oil before use. 

General Information

• Freshwater condition
• Opened & Inspected
• Professionally Cleaned
• Oil clean and free of metal and water
• New Impeller
• Pressure checked to 12 PSI minimum
• Fully Resealed
• Shafts checked for straightness

Criteria to validate your 1 year warranty:

• Core must be of equal or greater value
• Cannot be locked up - driveshaft must spin
• Up to 30 days from the date of purchase to send in your core
• Covers mechanical aspects ONLY
• Warranty begins from date of purchase

You will receive two copies of the terms and conditions for the lower unit one year warranty. One copy MUST be signed and returned with your core. Without a returned signed copy, the one year warranty will not be valid. 

Upon receipt of your core, we will inspect the unit to determine if it meets the criteria to validate the 1 year warranty. We reserve the right to accept or reject any core at our discretion. If you have any questions or concerns, please do not hesitate to contact us and we would be happy to help!

We offer a 30 day return policy on this product so you can purchase it with confidence. If you have any issues with the product, please reach out to us and we would be happy to help resolve any issue that may occur. Please be absolutely sure this is the correct one for your motor prior to purchasing.

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!