This New Outboard Extension Kit by Bay Manufacturing is specifically designed to convert select Yamaha 115 HP, 130–250 HP, and F150 HP outboard motors 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 (6 studs, nuts, socket screw, dowel pins, and optional speedometer tube) for a complete and reliable installation.
Product Features
- Manufacturer: Bay Manufacturing
- Application: Yamaha Outboard Motors (115–250 HP)
Motor Compatibility: * 115 HP: C115, P115, B115, S115 (2-Stroke)
- 130, 150, 175 HP: (2-Stroke Models)
- F150, F200 HP: (4-Stroke, 2.8 Liter 4-Cylinder)
- 200 HP: Non-SHO Models (6 studs and a cap bolt / 21.5" Gearcase) or 3.3 Liter Models (6 studs and a cap bolt / 21.5" Gearcase)
- SHO Models (2010 & Newer): 200 HP (SHO LA, SHO LB), 225 HP (SHO LA, SHO LB), 250 HP (SHO LA, SHO LB)
- Conversion Length: Designed for 15″-20″ or 25″-30″ conversions (specific to 250 HP SHO).
- IMPORTANT 200 HP NOTE: PLEASE CONTACT US. 200 HP Yamaha motors must be verified in our system to determine if you require this 801 kit or the 805 kit.
- Function: Outboard Extension Kit (Converts motor to longer shaft)
- Added Length: 5 inches
- Manufacturer Item #: 801
- Condition: 100% brand-new Bay Manufacturing kit
- Included Components: (1) 5″ housing, (1) 5″ drive shaft, (1) 5″ shift shaft, (1) 5″ water tube, (6) studs and nuts, (1) socket screw, (2) dowel pins, (1) speedometer tube (optional)
- 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. Please ensure your motor model, horsepower, and gearcase specs are listed above before purchasing. For all 200 HP models, contact us first with your model number.
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.
