Manufacturer Part Number (MPN)
DF9.9BTX3
Marine Specialist Insight: The Suzuki DF9.9BTX3 (MPN DF9.9BTX3) is the definitive auxiliary power solution for offshore sailboats and large displacement hulls. Featuring a 25-inch extra-long shaft, this motor ensures the propeller stays submerged and provides consistent thrust in heavy swells. By combining High-Thrust gearing with Suzuki’s revolutionary Battery-Less EFI, it offers the mechanical reliability of a manual start with the digital precision of fuel injection.
The Professional Auxiliary: Extra-Long Reach
The Suzuki DF9.9BTX3 (MPN: DF9.9BTX3) is engineered for boats that require a deeper reach than a standard outboard can provide. The 25-inch "X" shaft is specifically designed for high-transom sailboats and as a secondary "kicker" for offshore fishing vessels. Unlike standard outboards, the High Thrust series utilizes a specialized lower gear ratio and a high-pitch propeller to generate massive low-end torque, providing the braking and maneuvering authority needed for heavy vessels.
This model features Suzuki’s world-class Battery-Less Electronic Fuel Injection (EFI) system. This means you get the benefits of smooth idling, instant throttle response, and effortless one-pull starts without the need to maintain a heavy starting battery. Furthermore, the Suzuki Lean Burn Control System optimizes the fuel-to-air ratio in real-time, delivering industry-leading fuel efficiency whether you are trolling for hours or motoring back to the dock.
Technical Specifications
| Official MPN |
DF9.9BTX3 |
| Shaft Length |
25" (Extra-Long Shaft) |
| Engine Type |
4-Stroke SOHC 2-Cylinder |
| Starting System |
Manual Recoil |
| Fuel Delivery |
Battery-Less EFI |
| Displacement |
327cc |
| Weight |
Approx. 104 lbs (47 kg) |
DF9.9BTX3 Key Features:
- 25-Inch Extra-Long Shaft: Essential for sailboats and high-transom powerboats to maintain prop immersion in rough water.
- High-Thrust Lower Unit: Designed to push heavy boats with more control, particularly during docking and low-speed maneuvers.
- Battery-Less EFI: Instant starts and superior reliability without the weight or maintenance of a battery.
- Suzuki Lean Burn Technology: Maximizes fuel economy by optimizing the air-fuel ratio across the entire powerband.
- Digital CDI Ignition: Provides a consistent, powerful spark for easy manual starts every time.
Frequently Asked Questions
1. Why is the "X" (25-inch) shaft necessary?
The extra-long shaft on the DF9.9BTX3 (MPN DF9.9BTX3) is specifically for boats with high transoms. It ensures the cooling water intake and propeller remain deep enough to function properly when the boat is pitching in waves.
2. Does this motor have a charging system?
Yes, even though it is a manual start model, it features a 12V 6A (optional 12A) alternator to provide power for your onboard electronics or to maintain a battery.
Outboard Motor Specialist | Verified Suzuki Marine Technical Data | MPN: DF9.9BTX3
