Motor Compatibility: YOUR MOTOR MUST MATCH ALL LISTED SPECS IN AT LEAST ONE COMPATIBILITY OPTION BELOW FOR THIS PART TO FIT.
| HP | Stroke | Serial # |
|---|---|---|
| 18 | 2 | 6416713 and Up |
OR
| HP | Stroke | Model Details | Shift Shaft Coupler |
|---|---|---|---|
| 20 | 2 | – | 3 holes in shift shaft |
| 25 | 2 | 10mm studs and has dowel pins | 3 holes in shift shaft |
OR
| HP | Stroke | Model | Serial Number |
|---|---|---|---|
| 30 | 2 | 2 Cylinder | G053314 and Up, OG760300 and Up, 0T782393 and Up, 1B180081 and Up |
OR
| HP | Stroke |
|---|---|
| 40 | 2 |
| 50 | 2 |
OR
| HP | Stroke | Shift Shaft Coupler |
|---|---|---|
| 20 | 2 | 2 holes in shift shaft |
OR
| HP | Stroke | Model Details | Shift Shaft Coupler |
|---|---|---|---|
| 25 | 2 | 10mm studs and has dowel pins | 2 holes in shift shaft |
OR
| HP | Stroke | Year |
|---|---|---|
| 25 | 4 | 2004 and Older |
| 30 | 4 | 2004 and Older |
OR
| HP | Stroke |
|---|---|
| 40 | 4 |
| 50 | 4 Stroke – 3 Cylinder |
OR
| HP | Stroke | Model | Serial # |
|---|---|---|---|
| 70, 80 | 2 | 3 Cylinder | A996142 and Up |
| 90 | 2 | 3 Cylinder | A996142 through D283221 |
| 100 | 2 | 4 Cylinder | B209468 through D283221 |
| 115 | 2 | Does not fit inline 6 | B209468 through D283221 |
OR
| Horsepower | Stroke |
|---|---|
| 45, 55 | 2 |
OR
| Horsepower | Stroke | Model | Serial Number |
|---|---|---|---|
| 60 | 2 | 3 Cylinder | D000750 and Up, 0T455053 and Up |
OR
| HP | Stroke | Model | Model Details |
|---|---|---|---|
| 30, 40 | 2 | Big Foot 3 Cylinder | Housing measures 17 inches |
OR
| HP | Stroke | Model | Serial # |
|---|---|---|---|
| 75 | 2 | Non Optimax | B240451 and Up, D283222 and Up |
| 75 | 2 | Optimax | 1B027808 and Up |
| 90 | 2 | Optimax | 1B027808 and Up |
| 90 | 2 | 3-Cylinder | D283222 and Up |
| 100 | 2 | 4-Cylinder | D283222 and Up |
| 115 | 2 | Optimax, 4-Cylinder | D283222 and Up, 1B027808 and Up |
| 125 | 2 | – | D283222 and Up |
OR
| Horsepower | Stroke | Model |
|---|---|---|
| 75, 90, 100, 115 | 4 | 1.7 Liter |
OR
| HP | Stroke | Model | Serial # |
|---|---|---|---|
| 40 | 4 | – | OT and Up |
| 50 | 4 | 4 Cylinder | 1B020914 and Up or OT and Up |
OR
| HP | Stroke | Model | Serial # |
|---|---|---|---|
| 60 | 4 | Command Thrust / 4-Cylinder | 1B144686 or OT and up |
OR
| HP | Stroke | Model | Serial # |
|---|---|---|---|
| 60 | 4 | Command Thrust / 4-Cylinder | 1B144686 or OT and up |
OR
| Horsepower | Stroke | Model |
|---|---|---|
| 225 | 2 | EFI – Mercury models with Yamaha powerhead. |
OR
| Horsepower | Stroke |
|---|---|
| 75, 90, 115, 140 | 4 |
OR
| Horsepower |
|---|
| 40, 50, 60 |
OR
| Horsepower |
|---|
| 200, 225, 250 |
OR
| Horsepower | Stroke | Model |
|---|---|---|
| 115 | 2 | – |
| 130, 150, 175 | – | – |
| F200 | 4 | 2.8 Liter 4 cylinder |
OR
| Horsepower | Model | Year |
|---|---|---|
| 200 | 2.8 Liter (4 cyl) | – |
| 200 | 3.3 Liter | – |
| 225 | – | 1984-1993 |
| 225 | – | 1994-1998 |
| 200, 225, 250 | SHO LA, SHO LB Model | – |
| 200, 225, 250 | Other | 2010 and Newer |
OR
| _HP_ | Model |
|---|---|
| 200, 225, 250, 300, F225, F250, F330 | 3.3 Liter |
OR
| _HP_ | Model | # of Studs/ Gearcase Length | Water Tube Diameter |
|---|---|---|---|
| 200, 225, 250, 300 | Non 3.3L Models | 7 and a cap bolt / 23.5 inches | 5/8″ |
OR
| Horsepower | Serial Number | Year |
|---|---|---|
| T25 | Non-6FM | Pre 2018 |
OR
| Horsepower | Serial Number | Stroke | Shift Shaft Style |
|---|---|---|---|
| 25, 30, 40, 50 | 63D, 6BD, 6H5 | 2 | Threaded |
| 30, 40, 50 | – | 4 | Threaded |
OR
| Horsepower | Serial Number | Stroke | Shift Shaft Style |
|---|---|---|---|
| 25, 30, 40, 50 | 6H4, 6J8 | 2 | .265-.272 diameter |
OR
| Horsepower | Stroke |
|---|---|
| F50, T50, F60, T60 | 4 |
OR
| Horsepower | Year |
|---|---|
| F70LA | 2010 and Newer |
OR
| Horsepower | Serial Number | Stroke |
|---|---|---|
| 70, 75, 80, 85, 90 | 67F, 6H3 | 2 |
OR
| Horsepower | Serial Number |
|---|---|
| 25 | 65W, 6BPK, 61N (Enduro) |
OR
| Horsepower | Serial Number | Stroke |
|---|---|---|
| F20B | 6FM, 6HY | 4 |
| 25 | 6L2K | 2 |
| F25 | 6FM | 4 |
OR
| Horsepower | Serial Number | Year |
|---|---|---|
| T25 | 6FM | 2018 and Newer |
OR
| __HP__ | Model | Year | Extension Length |
|---|---|---|---|
| VF200, VF250 | LA, LB, LC | – | – |
| 200, 250 | SHO LA, LB | 2010 and Newer | 20 – 25″ |
OR
| Horsepower | Serial Number | Stroke |
|---|---|---|
| F75B, F90LB, F90JB, F90XB, VF90LA, VF90XA | 6EK | – |
| 100 | 67F | – |
| 115 | – | 4 |
OR
| Horsepower | Model | Year |
|---|---|---|
| 200, 225, 250 | – 4.2 Liter SHO XA – 4.2 Liter SHO XB | – |
| 200, 225, 250, 300 | All other Models | 2010 and Newer |
OR
| Horsepower | Model |
|---|---|
| F225, 225, F250, 250, F300, 300 | 4.2 Liter Off-Shore Series |
OR
| Horsepower | Serial Number | Stroke | Shift Shaft Style |
|---|---|---|---|
| 25, 30, 40, 50 | 63D, 6BD, 6H5 | 2 | Splined (7 Splines) |
| 30, 40, 50 | – | 4 | Splined (7 Splines) |
OR
| Horsepower | Serial Number | Stroke | Shift Shaft Style |
|---|---|---|---|
| 25, 30, 40, 50 | 6H4, 6J8 | 2 | .235 in diameter |
OR
| Horsepower | Serial Number |
|---|---|
| F75A, F80, F90LA, F90XA, F90JA, F100 | 67F |
OR
| Horsepower | Serial Number | Year | Extension Length |
|---|---|---|---|
| T25 | 6FM | 2018 and Newer | 25″ to 30″ |
OR
| HP | Model | Year | Conversion Length |
|---|---|---|---|
| 350 | V8 | 2019 and Older | 25″-30″ |
OR
| Horsepower |
|---|
| 150 – 300A |
OR
| Horsepower | Year |
|---|---|
| 75, 90 | 2009 and Newer |
OR
| Horsepower | Conversion Length |
|---|---|
| 300B-350 | 20″-25″ |
OR
| Horsepower | Conversion Length |
|---|---|
| 300B-350 | 25″-30″ |
OR
| Horsepower |
|---|
| 200, 225, 250 |
OR
| Horsepower |
|---|
| 40, 50 |
OR
| Horsepower |
|---|
| 75, 90, 100 |
P/N: LN1015SS
Material: Stainless Steel
Manufacturer: Bay Manufacturing
Ships In 2 Business Days
/ea
*Parts are specific to this kit and the motor specs listed in the table above

Lifetime Performance

Rapid Install

>10X Less New Motor

Unmatched Flexibility
Lock Nuts are designed to fasten to the studs and securely hold the new extension housing in place as the motor is extended in length. They are precisely engineered with machined threads to fit perfectly onto the studs and hold the engine together securely.
Return Policy
1. Returns and Refunds:
We offer a 60-day return policy for all purchases. If you are not satisfied with your purchase, you may return the unused and undamaged item(s) within 60 days from the date of delivery for a refund, subject to the terms outlined below.
2. Restocking Fee:
A 20% restocking fee will be applied to all returned items. This fee is waived if the return is due to an error on our part, such as shipping the wrong parts.
3. Return Shipping:
Customers are responsible for the return shipping costs. However, if the return is due to an error on our part, such as shipping the wrong parts, we will cover the return shipping costs.
4. Condition of Returned Items:
Returned items must be in their original condition, unused, and undamaged. We reserve the right to refuse returns if the items show signs of use or damage.
5. How to Initiate a Return:
To initiate a return, please contact our customer service team by email:bayextensionkits@gmail.com or phone: 1-419-499-4602 to begin the return process. We will need you to provide your Name and Date of Purchase to look up your order.
6. Refund Process:
Upon receipt of the returned item(s), we will inspect the items to ensure they meet the return policy criteria. Refunds will be processed after the inspection is completed. Please allow up to 10 business days for the refund to be credited to your original method of payment.
7. Contact Information:
For any questions regarding our return policy, please contact us at:
Bay Manufacturing
1413 State Route 113 East
Milan, Ohio, 44846
bayextensionkits@gmail.com
1-419-499-4602
By purchasing from Bay Manufacturing, you agree to the terms and conditions of this return policy.
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