1980 1981 - 1997 Mercury 20" Lower Unit 35 40 45 50 60 70 HP 6 MONTH WARRANTY

• 20 Inch Driveshaft  
• Pressure checked and new impeller installed
• Warranty with exchange of a spinning core

• Shifts and spins smoothly without binding
• Shafts checked for straightness
• Driveshaft splines show slight wear 
• Freshwater Condition
• New Impeller installed
• Pressure checked to 12 PSI

Driveshaft splines: 11

Propeller shaft splines: 13

Driveshaft length from the top of the water pump to top of the load pin: 21-1/8"

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

This lower unit qualifies for a 6 month warranty.  The warranty is validated by your core.  In order to qualify for this, you must send in that core.  Both shafts must spin and it must be complete.  We will send a label for you to return your core in our box after receipt of the unit you’ve purchased.  If you do not have a spinning core, you may call in after your purchase and buy the 6 month warranty for 10% of the purchase price.  If you do not return a core or purchase a warranty, this unit will be sold with a 45 day warranty and nothing more or less.

Location: Southcentral Outboards, Altamont, Illinois

1980-1997 - 35 40 45 50 60 70 HP

At this time, we are unsure of all the years and horsepowers that this will fit. If you need help identifying if this is the correct fit for your motor, please do not hesitate to contact us prior to purchasing and we would be happy to help!