Suzuki 9.9 HP DF9.9BTX EFI Outboard Motor – Extra-Long Shaft & Electric Start!
The Suzuki 9.9 HP DF9.9BTX EFI Outboard Motor is a powerful, fuel-efficient, and ultra-reliable engine designed for medium to larger jon boats, skiffs, sailboats, and trolling applications. Featuring Electronic Fuel Injection (EFI), this extra-long 25” shaft model provides exceptional throttle response, smooth operation, and enhanced fuel efficiency.
With its electric start system and built-in 12V charging alternator, this lightweight 4-stroke outboard is perfect for freshwater and saltwater use, offering multi-layer corrosion protection and a saltwater-rated build. The thru-cowling manual backup start, forward-mounted gear shift, power tilt, and 5 trim positions ensure optimal control in all conditions.
Whether you’re looking for a reliable auxiliary motor or a primary power source, the Suzuki DF9.9BTX delivers unmatched performance and efficiency.
Key Features & Benefits
- Electronic Fuel Injection (EFI) – Provides precise fuel delivery for smooth acceleration & efficiency
- Extra-Long 25” Shaft – Ideal for sailboats, larger skiffs & trolling applications
- Push-Button Electric Start + Manual Backup – Reliability in any condition
- Quiet, Smooth & Vibration-Free – Through-the-prop exhaust system reduces noise
- 12V 145W 12A Alternator – Provides onboard charging for marine electronics
- Power Tilt & 5 Trim Positions – Adjust for different water conditions & docking ease
- Multi-Layer Corrosion Protection – Saltwater rated for long-lasting durability
- Lightest EFI Outboard in its Class – Compact, sleek & easy to transport
- Suzuki Lean Burn Control System – Up to 17% better fuel efficiency than some competitors
- 3-Year Suzuki Warranty – Trusted performance backed by Suzuki
Engine & Performance
| Engine Type | 4-Stroke EFI Outboard |
|---|---|
| Horsepower | 9.9 HP |
| Shaft Length | 25” (Extra Long) |
| Starting System | Electric Start + Manual Backup |
| Fuel System | Electronic Fuel Injection (EFI) |
| Full Throttle RPM Range | 5000-6000 RPM |
| Displacement | 327 cc (20.0 cubic inches) |
| Bore & Stroke | 60.4 x 57 mm (2.38 x 2.24 inches) |
| Cooling System | Water-Cooled, Thermostatically Controlled |
| Alternator Output | 12V 145W 12A |
| Fuel Type | Unleaded Gasoline (87 octane) |
| Fuel Tank Capacity | 3.1 US Gallons (Included) |
| Lubrication System | Wet Sump – Trochoid Type Cam-Driven Oil Pump |
| Oil Capacity | 33.8 fl oz. (1000 mL) |
Propulsion & Control
| Steering Type | Remote Control |
|---|---|
| Gear Shift | Forward-Neutral-Reverse (Front-Mounted Lever) |
| Gear Ratio | 2.08:1 |
| Propeller | 4-Blade Aluminum (10” Dia x 5” Pitch) |
| Power Tilt & Trim | Yes – 5 Trim Positions with Tilt Lock Pin |
| Steering Friction Tension Control | Yes |
Safety & Durability
| Saltwater Rated | Yes – Multi-Layer Corrosion Protection |
|---|---|
| Low Oil Pressure Warning System | Yes |
| Overheat Warning System | Yes |
| Over-Rev Limiter Protection | Yes |
| Start-in-Gear Lockout Protection | Yes |
| Emergency Lanyard Stop Switch | Yes |
What’s Included in the Box?
- Suzuki 9.9 HP DF9.9BTX EFI Outboard Motor
- 3.1-Gallon External Fuel Tank & Fuel Line
- 4-Blade Aluminum Propeller
- Owner’s Manual
- Tool Kit
- Suzuki 3-Year Warranty
Note: Battery & remote control cables are not included and may need to be purchased separately based on installation setup.
Frequently Asked Questions (FAQ)
Is the Suzuki DF9.9BTX suitable for saltwater use?
Yes! This outboard is saltwater-rated and features multi-layer corrosion protection for long-term durability in harsh marine environments.
Does this outboard have manual start as a backup?
Yes! While it features electric start, it also retains a thru-cowling manual pull start for emergency use.
What type of boats is this outboard ideal for?
The 25” extra-long shaft is perfect for sailboats, trolling/kicker applications, and larger jon boats/skiffs.
How fuel-efficient is this outboard?
Suzuki’s Lean Burn Control System improves fuel efficiency by up to 17% compared to some competitor 4-strokes.
Does this outboard charge a battery?
Yes! It features a 12V 145W 12A alternator, allowing you to charge onboard electronics while running.
Get superior fuel efficiency, quiet performance, and unmatched reliability with the Suzuki 9.9 HP DF9.9BTX EFI Outboard Motor. Whether you’re powering a sailboat, skiff, or using it as an auxiliary motor, this extra-long shaft outboard is built to perform.

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