This SEI Marine driveshaft is a direct replacement for Mercury & Mariner 4-Stroke 30–50 HP outboards equipped with the 20" BigFoot lower unit.
Designed to OEM specifications, it ensures proper fitment, smooth driveline operation, and long-lasting performance.
Product Features
- Fits Mercury / Mariner 30–50 HP 4-Stroke
- For Carbureted models
- 20" (L) driveshaft
- BigFoot lower unit only
- 13 spline
- Replaces OEM part 45-854808A1
- Durable marine-grade construction
- Brand: SEI Marine
Additional Information
All rebuild components—bearings, seals, gears, and hardware—are available for order.
If you require additional parts, contact us for a complete rebuild parts list.
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 be excluded from international shipping.)
Customer Support
For questions or compatibility confirmation, email: customerservice@marinepartswarehouse.com
Please include your engine model number.
