Mercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HP

 
$650.00
International Shipping Quote
  • Brand: Mercury
  • Size: 40 50 60 70 HP
  • Color: Black
  • Style: 2 & 3 Cylinder - Long - 11/13 Splines
  • Condition: Used
  • Notes: 20" - Fully resealed
  • SKU: 53486 LRU
  • Manufacturer Part Number: 1643-6038A18 6038A18 4931A10 4814A11
  • Country of Manufacture: United States
  • Motor & Engine Type: Mercury
  • Part Type: Motors, Engines & Components
  • Other Part Number: N/A
  • Surface Finish: Painted, Black
  • Inventory Number: 53486 LRU
  • Website Category: Lower Units
  • Website Sub Category: Complete Lower Units
  • UPC: N/A
  • Shipping: $50.00

KEY POINTS:
  • 20 Inch Driveshaft  
  • Fully resealed 
  • Extended Warranty with exchange of a spinning core (see below for more info)
Additional Info
  • Shifts and spins smoothly without binding
  • Shafts checked for straightness
  • Driveshaft splines show
  • Gears & clutch are in
  • Freshwater Condition
  • New Impeller
  • Fully Resealed & 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: 21-2/8"

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

This lower unit qualifies for a 1 year 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 1 year 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
Fits:
1971-1979 - 40 50 60 70 HP - 2 & 3 Cylinder

This unit interchangeable with 1980-1986 and 1987-1997 models but different housing on this one (rounded cavitation plate on this one). This will not fit the 65hp 3 cylinder engine. 

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!
Mercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HP
Mercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HPMercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HPMercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HPMercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HPMercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HPMercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HPMercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HPMercury 1971 1972 1973 1974 1975 1976 - 1979 20" Long Lower Unit 40 50 60 70 HP