This listing is for a new 5-inch Outboard Extension Kit manufactured by Bay Manufacturing for select Johnson & Evinrude 75–235 HP outboard motors. Each kit adds 5 inches to your motor and is designed for long-term durability in marine environments.
Some newer spacer housings may arrive painted black, while others are unpainted with a clean sandblasted finish. Finish may vary. Each kit includes a 1-year manufacturer warranty.
⚠ Important Fitment Notes:
- Certain ETEC models only fit inline engines
- ❌ Does NOT fit new V4 models
- ❌ Some models do not fit Generation 2
- Your motor must match all listed specifications to fit this kit
Product Features
- Adds 5 inches to outboard motor length
- Designed for Johnson & Evinrude 75–235 HP applications
- Stainless steel shafts and studs for corrosion resistance
- Spacer housings cast from the same alloy series as original motors
- Complete conversion kit with all required components
- Manufactured by Bay Manufacturing
Fitment Information
YOUR MOTOR MUST MATCH ALL LISTED SPECS TO FIT KIT
Special Notes
- ETEC models fit inline engines only
- Does NOT fit new V4 models
- Generation 2 engines are not supported (see table notes)
Compatible Horsepower & Year Ranges
| Horsepower | Year(s) |
|---|---|
| 60 | 1997–2003 |
| 75 ETEC* | 2004–2020 |
| 80 | 1993–1995 |
| 85 | 1978–1980, 1991–1992, 1995 |
| 88 | 1987–1996 |
| 90 | 1981–2003 |
| 90 ETEC* | 2004–2020 |
| 100 | 1979–1980, 1985–1995 |
| 110 | 1986–1990 |
| 112 | 1994–1996 |
| 115 | 1978–1985, 1990–2009 |
| 120 | 1986–1992 |
| 125 Comm.** | 1993–1995 |
| 140 | 1986–1987, 1991 |
| 140TL | 1978–1980, 1982–1984, 1988–1992 |
| 140ML | 1978–1980, 1982–1984 |
| 140TR | 1983 |
| 150 | 1979–1984 |
| 155 | 1984 |
| 175 | 1979–1984 |
| 185 | 1984 |
| 200 | 1979–1983 |
| 235 | 1979–1984 |
Notes:
- Only fits inline models – does NOT fit new V4 models
- Does not fit Generation 2 – Generation 1 only
Kit Specifications
- Extension Length: 5 inches
- Paint Color: Unpainted (paintable) or black (finish may vary)
- Manufacturer: Bay Manufacturing
- Kit Number: 506
- Horsepower Range: 75–235 HP
Parts Included
- (1) 5″ Housing
- (1) Exhaust Stack
- (1) Plastic Tube
- (1) 5″ Driveshaft
- (1) 5″ Shift Shaft
- (1) 5″ Water Tube
- (5) Studs and Nuts
- (1) Socket Screw
- (1) Tube
Returns & Warranty
- 1-Year Manufacturer Warranty
- Not eligible for return for any reason other than a valid warranty claim
Shipping Information
Additional shipping fees apply for Alaska, Hawaii, U.S. Territories, and International orders.
International shipping is calculated after checkout. Customers will receive an email and a PayPal money request for any additional shipping charges.
(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 or serial number to help confirm proper fitment before ordering.
