This New Outboard Extension Kit by Bay Manufacturing is specifically designed to convert select Yamaha 25 HP, 30 HP, 40 HP, and 50 HP outboard motors (featuring a threaded shift shaft) by adding 5 inches to the midsection.
Manufactured with quality in mind, the kit features spacer housings cast from the same series alloy as the original motors, coupled with durable stainless steel shafts and studs for long-term reliability in the marine environment. This conversion is ideal for optimizing your motor's performance and matching it to a transom requiring a longer shaft length.
Each kit includes the 5″ housing, essential shafts (drive, shift, water tube), and all necessary mounting hardware (studs, nuts, screws, and dowel pins) for a complete and reliable installation.
Product Features
- Manufacturer: Bay Manufacturing
- Application: Yamaha Outboard Motors (25 HP, 30 HP, 40 HP, 50 HP)
Motor Compatibility:
- T25 (Non-6FM Series, Pre-2018)
- 25, 30, 40, 50 HP (2-Stroke Models with Threaded Shift Shaft)
- 30, 40, 50 HP (4-Stroke Models with Threaded Shift Shaft)
- Shift Shaft Style: Threaded
- Note: If your shift shaft is splined, you will need our separate Item #806A Kit.
- Function: Outboard Extension Kit (Converts motor to longer shaft)
- Added Length: 5 inches
- Manufacturer Item #: 806
- Condition: 100% brand-new Bay Manufacturing kit
- Included Components: (1) 5″ housing, (1) 5″ drive shaft, (1) 5″ shift shaft, (1) 5″ water tube, (4) studs and nuts, (1) cap screw, (2) dowel pins
- Finish: Unpainted (Sandblasted finish – May be unpainted or painted black, depending on stock)
- Warranty: 1-Year Manufacturer Warranty
Additional Information
IMPORTANT COMPATIBILITY NOTE: YOUR MOTOR MUST MATCH ALL LISTED SPECS TO FIT THIS KIT. This kit is specifically for models with a threaded shift shaft. Please ensure your motor model, horsepower, and serial number are listed above before purchasing.
RETURN POLICY: These items are not eligible for return for any reason other than a valid warranty claim.
Shipping Information
SHIPPING: Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
You will receive an email and a PayPal money request for the additional shipping charges at the email address provided.
(Some items are excluded from international shipping.)
Customer Support
For questions or to confirm compatibility, please email customerservice@marinepartswarehouse.com.
Please include your engine model number to help confirm proper fitment before ordering.
