- Brand: Mercury
- Size: 90 115 125 140 150 HP
- Color: Black
- Style: Inline 6 - 20"
- Condition: Seller Refurbished
- Notes: Opened & Inspected!
- SKU: 31305 LRU
- Manufacturer Part Number: 7333T24 7333A24 6053A15 6053A14 6053A4 5829A7
- Country of Manufacture: United States
- Motor & Engine Type: Mercury
- Part Type: Motors, Engines & Components
- Other Part Number: 5578A7 5244A7 4934A7 4749A4
- Surface Finish: Painted, Black
- Inventory Number: 31305 LRU
- Website Category: Lower Units
- Website Sub Category: Complete Lower Units
- UPC: N/A
Mercury Long 20" Lower Unit Inline 6
Mercury Long 20" Inline 6 lower unit for 1970–1979 outboards, 90 115 125 140 150 HP. Inspected, serviced, and tested for proper function. Gears are replaced only if bad — good OEM gears are retained. Please note: This does have cosmetic flaws in the paint, such as scratches and scuffs, but this will not affect performance. This does not come with the trim tab. The prop shaft is straight, and the driveshaft splines are in good condition with slight wear. Please note that there are holes in the cavitation plate, where a planing fin once sat.
SPECS
| Driveshaft length: 20-3/4″ | |
| Driveshaft splines: 8 | 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 ❖ Opened and inspected |
FITMENT
Mercury Long 20"
| Years | 1970–1979 |
| Shaft | 20" (long) |
| Horsepower | 90 115 125 140 150 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
