1970-86 Mercury 20" Lower Unit 75 80 85 HP 2.4:1 Ratio Inline 4 1 YEAR WARRANTY!

This lower unit has been professionally inspected and is ready for installation. The gears and bearings in the unit are in excellent condition. There are some minor dings and a chip along the edge of the skeg, but this is entirely cosmetic. The paint is in overall good shape with only minor scuffs and scratches. Please note that this does not come with the trim tab. There are pre-drilled holes in the cavitation plate where a planing fin can be added. From the base of the water pump to the end of the driveshaft, it measures approximately 20-3/4" long and has 8 splines. The propeller shaft has 15 splines. The unit is considered a long shaft and has a 2.4:1 gear ratio. We have drained the unit of oil and this will have to be done prior to use. Purchase with confidence!

General Information

• Freshwater condition
• Opened & Inspected
• Professionally Cleaned
• New Impeller
• Pressure checked to 12 PSI minimum
• Fully Resealed
• Shafts checked for straightness
  
• 1 year mechanical warranty

To obtain the 1 year warranty, you MUST send in your core lower unit. We will even pay to have your core shipped to us! Below is the criteria required to validate the warranty:

• Core must be of rebuildable quality
• 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
• Core must be complete and cannot be missing parts
  
  

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 at 618-487-9499 and we would be happy to help! 

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!