This listing is for a New Outboard Extension Kit manufactured by Bay Manufacturing.
Each kit includes a 1-year warranty and is engineered to add a true 5 inches to your outboard motor.
Some newer spacers may arrive painted black, while others feature an unpainted sandblasted finish—both deliver long-lasting durability.
This 303A Kit is designed specifically for threaded-style shift shafts.
There is no compatibility with 2-hole drill pin shift shafts (for those applications, the 303 Kit is required).
Product Features
- Adds 5 inches of shaft length
- Fits Mercury 25–30 HP 4-Stroke (2005 & Newer)
- Designed for threaded shift shaft systems
- Spacer housing made from marine-grade alloys
- Stainless steel shafts & hardware
- Direct bolt-on conversion
- Manufactured by Bay Manufacturing
Includes:
- (1) 5″ spacer housing
- (1) 5″ drive shaft
- (1) 5″ shift shaft
- (1) 5″ water tube
- (3) studs & nuts
- (1) bushing
Additional Information
Compatibility Notes:
- For motors built by Tohatsu with 5-stud housings
- If your shift shaft uses a 2-hole drill pin, you must use kit 303, not 303A
- Designed for OR Serial Number ranges
- Mercury made design updates around 2005—confirm your shift shaft style before ordering
This product is not eligible for return except for verified warranty claims.
Shipping Information
Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
A PayPal invoice 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.
