- Brand: Mercury
- Size: 65 75 80 85 HP
- Color: Black
- Style: Inline 4 - 2.4:1 Gear Ratio - 20" Long
- Condition: Used
- Notes: 20"- Fully resealed
- SKU: 53451 LRU
- Manufacturer Part Number: N/A
- Country of Manufacture: United States
- Motor & Engine Type: Mercury
- Part Type: Motors, Engines & Components
- Other Part Number: N/A
- Surface Finish: Painted, Primed
- Inventory Number: 53451 LRU
- Website Category: Lower Units
- Website Sub Category: Complete Lower Units
- UPC: N/A
- Shipping: $75.00
Mercury 20" Lower Unit 2.4:1 Ratio Inline 4
Mercury 20" 2.4:1 Ratio Inline 4 lower unit for 1980–1986 outboards, 75 80 HP. Inspected, serviced, and tested for proper function. Gears are replaced only if bad — good OEM gears are retained.
SPECS
| Driveshaft length: 20-3/8″ | |
| Driveshaft splines: 9 | Prop shaft splines: 15 |
Driveshaft length measured from the top of the water pump.
WHAT WE DID
| ❖ Fully resealed ❖ Pressure checked to 12 PSI ❖ New water pump impeller installed | ❖ Driveshaft and prop shaft checked straight ❖ Shifts smoothly through gears |
FITMENT
Mercury 20"
| Years | 1980–1986 |
| Shaft | 20" |
| Horsepower | 75 80 HP |
Verify by model and serial number before purchase to confirm this is the correct unit for your application.
Backed by Southcentral Outboards. Warranty validated by core return — we provide the shipping label. Failures during normal use within the warranty period will be repaired or replaced.
DISCLAIMER
Listing info accurate to the best of our knowledge but not guaranteed. Fitment is the buyer’s responsibility — verify by model and serial before purchase.
SOUTHCENTRAL OUTBOARDS · ALTAMONT, IL
