This SEI Marine 25" (XL) Driveshaft is a direct-fit replacement for Mercury & Mariner 4-Stroke EFI 70–115 HP outboards with serial numbers 1B366822 and below.
Engineered to OE tolerances, this driveshaft restores proper operation and reliability for early-production EFI four-stroke models.
Ideal for servicing worn, corroded, or damaged driveshaft assemblies on mid-range Mercury and Mariner EFI platforms.
Product Features
- Fits Mercury & Mariner 4-Stroke EFI 70–115 HP
- 25" XL model
- For early models with S/N 1B366822 and below
- Direct replacement for OEM #45-878575T1
- Precision-machined for OE fit and performance
- Brand: SEI Marine
Additional Information
All rebuild components—gears, bearings, seals, and hardware—are available upon request. Contact us if you need additional items for a complete repair or rebuild.
Shipping Information
Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
A PayPal money request will be sent for any additional shipping 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.
