Upgrade the performance and versatility of your Mercury outboard with this Bay Manufacturing 615AL Outboard Extension Kit, engineered to add 5 inches of shaft length for applications requiring a 25″ to 30″ conversion. Built with high-quality marine-grade components, this extension kit matches OEM specifications and is designed for long-term durability.
This kit includes all hardware necessary except the drive shaft for S-Model kits, and is compatible with a range of Mercury 2.1L 4-Stroke and Pro XS outboards.
Product Features
- Adds 5 inches to your Mercury outboard's shaft length
- Designed for motors requiring a 25″ to 30″ conversion
- Precision-machined spacer housing for perfect alignment
- Manufactured from corrosion-resistant marine-grade materials
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Compatible with:
- 90 & 115 HP 2.1L 4-Stroke (Serial 2B and Up)
- 150 Pro XS (Non-Verado)
Includes all required extension components:
- (1) 5″ spacer housing
- (1) 5″ drive shaft
- (1) 5″ shift shaft
- (1) 5″ water tube
- (4) studs
- (1) screw
- (2) dowel pins
- Fits Pro XS 3.0L (Sport Master 4.8″ / 5.4″) units going from 25″ to 30″
Additional Information
- Built by Bay Manufacturing, the industry leader in precision extension kits
- Ensures proper engine height for improved handling, thrust, and reduced cavitation
- Not returnable except for warranty claim purposes
Shipping Information
Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
A PayPal request will be emailed for any additional charges.
(Some items may be excluded from international shipping.)
Customer Support
For questions or to confirm compatibility, please email customerservice@marinepartswarehouse.com
Please include your engine model or serial number to help confirm proper fitment before ordering.
