This SEI Marine driveshaft is a direct replacement for Mercury & Mariner 40–60 HP 4-Stroke outboards equipped with the 20" BigFoot lower unit.
Engineered to factory specifications, it provides smooth, reliable power transfer and long-term durability.
Product Features
- Fits Mercury / Mariner 40–60 HP 4-Stroke
- 20" (L) driveshaft
- BigFoot lower unit only
- 17 spline
- OEM replacement for 45-859105A1
- High-strength construction for marine environments
- Brand: SEI Marine
Additional Information
All rebuild components—including gears, seals, shafts, and hardware—are available for order.
If you need additional parts, contact us and we can assemble a full parts list for your rebuild.
Shipping Information
Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
A follow-up email and PayPal request will be sent for any additional charges.
(Some items may not be eligible for international shipping.)
Customer Support
For questions or compatibility confirmation, email: customerservice@marinepartswarehouse.com
Please include your engine model number.
