- Brand: Yamaha
- Size: 40 50 HP
- Style: 20" Driveshaft - 4 stroke - 14/13 splines
- Condition: Re-manufactured
- Notes: Fully Resealed & Pressure Checked With New Impeller!
- SKU: 70143 LRU
- Manufacturer Part Number: N/A
- Country of Manufacture: Japan
- Motor & Engine Type: Yamaha
- Part Type: Motors, Engines & Components
- Inventory Number: 70143 LRU
- Website Category: Lower Units
- Website Sub Category: Complete Lower Units
- UPC: N/A
- Shipping: $75.00
Yamaha 20" Lower Unit 4 Stroke
Yamaha 20" 4 Stroke lower unit for 1998 & Up outboards, 40 50 HP. Inspected, serviced, and tested for proper function. Gears are replaced only if bad — good OEM gears are retained.
SPECS
| Driveshaft length: 20-3/4″ | |
| Driveshaft splines: 14 | Prop shaft splines: 13 |
Driveshaft length measured from the top of the water pump.
WHAT WE DID
| ❖ Opened and inspected under magnification ❖ Fully resealed | ❖ Pressure checked to 12 PSI ❖ New water pump impeller installed |
FITMENT
Yamaha 20"
| Years | 1998 & Up |
| Shaft | 20" |
| Horsepower | 40 50 HP |
Verify by model and serial number before purchase to confirm this is the correct unit for your application.
Backed by Southcentral Outboards. 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

