- Brand: Mercury
- Size: 40 50 60 70 HP
- Color: Black
- Style: 2, 3 & 4 Cylinder - Long
- Condition: Seller Refurbished
- Notes: Tested, Cleaned & Inspected!
- SKU: 31426 LRU
- Manufacturer Part Number: 6038A7 4931A30 6038A18 4931A10 4814A11
- Country of Manufacture: United States
- Motor & Engine Type: Mercury
- Part Type: Motors, Engines & Components
- Surface Finish: Painted, Black
- Warranty: 30 days
- Inventory Number: 31426 LRU
- Website Category: Lower Units
- Website Sub Category: Complete Lower Units
- UPC: N/A
Mercury 20" Lower Unit C# 1643-6037
Mercury 20" C# 1643-6037 lower unit for 1971–1979 outboards, 037 40 50 60 70 HP. Inspected, serviced, and tested for proper function. Gears are replaced only if bad — good OEM gears are retained. Please note: There is some wear in the paint, primarily in the skeg. Please note that this does not come with the trim tab. The intake screens are in perfect shape and are not broken or cracked. All the splines are in great condition and are not twisted or chipped in any way.
SPECS
| Driveshaft length: 21-1/8″ | |
| Driveshaft splines: 11 | Prop shaft splines: 13 |
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 ❖ Professionally cleaned |
FITMENT
Mercury 20"
| Years | 1971–1979 |
| Shaft | 20" |
| Horsepower | 037 40 50 60 70 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
