This listing is for a New Outboard Extension Kit manufactured by Bay Manufacturing, designed specifically for Mercury 75–150 HP 4-Stroke outboards. Each kit includes a 1-year warranty. Some of the newer model spacers come painted black and some come unpainted with a clean sandblasted finish. Each kit adds 5 inches to your motor’s shaft length and includes all required add-on components.
This 615A kit fits models converting from 20" to 25".
(For 25" to 30" conversions, Bay Manufacturing’s 615AL kit is required.)
Product Features
- Fits Mercury 75, 90, 115 HP – 2.1L 4-Stroke (2B and up)
- Fits Mercury 150 PRO XS (Non-Verado)
- Adds 5 inches of shaft length
- High-strength stainless steel shafts and hardware
- Spacer housings cast from the same alloy series used in OEM Mercury engines
Includes:
- 5″ housing
- 5″ driveshaft
- 5″ shift shaft
- 5″ water tube
- (5) studs and nuts
- (1) screw
- (2) dowel pins
Compatible Serial Numbers:
- 2B095049 & Up (75, 90, 115, 150 HP)
Additional Information
- Designed for 20" → 25" conversions
- Durable corrosion-resistant components for long-term reliability
- Manufactured in the USA by Bay Manufacturing
Shipping Information
Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
A PayPal request 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.
