The Mercury 9.9 HP ELH Command Thrust EFI outboard, with a 20″ shaft, is a powerful and efficient engine perfect for small to medium-sized boats. It features electronic fuel injection (EFI) for smooth and reliable starting, enhanced fuel efficiency, and responsive performance. The electric start adds convenience, while the Command Thrust gearcase provides greater maneuverability and control. Ideal for deeper transom heights, this outboard offers exceptional performance and ease of use.
Mercury 9.9 HP ELH CT EFI Outboard Motor
Original price was: $3,630.00.$3,199.00Current price is: $3,199.00.
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Brand: Mercury Outboards
HP: 9.9
Starter Type: Electric
Shaft Length: 20″ (Long Shaft)
Command Thrust Lower Unit
At Plateau Marine / OutboardDirect.com, we believe in clear, upfront pricing.
Dealer Prep: Included
Full Mercury Factory Warranty valid at any authorized Mercury Dealer Nationwide.
Freight: Free within the 48 states, Includes residential delivery with hydraulic lift gate service Some exclusions may apply, call for details
In stock
The Mercury 9.9 HP ELH Command Thrust EFI outboard with a 20" shaft is a robust and technologically advanced engine, perfect for boaters seeking reliable and efficient performance. This outboard is equipped with an Electronic Fuel Injection (EFI) system, which optimizes fuel delivery for easy starting, smooth operation, and improved fuel efficiency. The EFI system adjusts the air-to-fuel ratio automatically, ensuring consistent performance across various conditions and elevations, and reducing emissions.
One of the key features of this outboard is its Command Thrust gearcase. The Command Thrust design includes a larger gearcase and a higher gear ratio, providing significantly more torque to the propeller. This feature is especially beneficial for heavier boats or boats carrying larger loads, as it enhances thrust and maneuverability at lower speeds. The Command Thrust gearcase also allows for a wider range of propellers, offering boaters the flexibility to fine-tune their propulsion system for specific applications, whether it's for cruising, fishing, or other activities.
The inclusion of an electric start system further enhances the user experience by providing effortless starting with just the push of a button. This convenience is particularly valuable in cold weather conditions or after periods of inactivity when manual starting can be difficult. The electric start system also includes a manual recoil start as a backup, ensuring reliable operation in any situation.
With a 20" shaft length, this Mercury 9.9 HP ELH model is ideal for boats with higher transoms, such as sailboats or certain pontoon boats. The longer shaft helps to maintain optimal propeller depth in the water, which is crucial for maintaining proper propulsion and handling characteristics. This feature also helps reduce ventilation in rough water conditions, ensuring consistent performance and control.
The outboard is designed with durability and ease of maintenance in mind. It features a corrosion-resistant design, with high-quality materials and coatings to withstand the harsh marine environment. The engine includes easy-access maintenance points, making routine checks and services straightforward. Additionally, it has a freshwater flushing system, which helps to remove salt and debris from the engine after use, prolonging its lifespan and maintaining peak performance.
Overall, the Mercury 9.9 HP ELH Command Thrust EFI outboard with a 20" shaft is an excellent choice for boaters looking for a reliable, efficient, and versatile engine. Its advanced features, including EFI, Command Thrust gearcase, and electric start, make it a top performer in its class, delivering exceptional power, control, and ease of use. Whether you're navigating calm inland waters or tackling coastal environments, this outboard provides the dependable performance you need to enjoy your boating adventures to the fullest.
Free Shipping (*excludes AK & HI) Residential Delivery and Lift Gate Service are included with the Free Delivery Offer.
Additional services from the freight carrier, (i.e. island delivery, airport delivery, ferry required for delivery) Will incur a charge from the freight carrier that will not be included with the free freight offer.
Additional information
| Horsepower | 9.9 HP |
|---|---|
| Shaft Length | 20" (Long) |
| Starter Type | Electric |
| Tilt & Trim | Manual |
| Brand | Mercury Marine |
| Color | Phantom Black |
| Manufacturer | Mercury Marine |
FEATURES
- Compact and Lightweight
- Electronic Fuel Injection (EFI)
- Digital CD Ignition with Spark Advance
- High Grade Marine Alloy Construction
- Stainless Steel Water Pump Housing
- Zinc Coated Water Passages
- Rated for Saltwater Use
- Sacrificial Zinc Anodes and Trim Tab
- Tiller Integrated F-N-R Gear Shifting
- Adjustable Steering Tension Control
- Twist-Grip Throttle with Tension Control
- Thermostat Controlled Water Cooling
- Auto Ratchet Trim System (5 positions)
- Shallow Water Drive
- Quiet Through-Propeller-Hub Exhaust
- 3.2 Gallon Fuel Tank and Fuel Line
- Start-In-Gear Protection
- Low Oil Pressure Warning Indicator
- ESG Over-Rev Protection
- Safety Lanyard Stop Switch
- Owner’s Manual
- Mercury Marine 3-Year Warranty
SPECS
| MODEL | Mercury Outboard 9.9ELH-CT-EFI |
|---|---|
| MODEL YEAR | 2026 |
| SKU | 1A10351LK |
| WEIGHT | 97 lb |
| MANUFACTURER | Mercury Marine |
| COUNTRY OF MANUFACTURE | Japan |
| HORSEPOWER | 9.9 HP |
| SHAFT LENGTH | 20″ (Long) |
| STEERING | Tiller |
| STARTING | Electric with Manual Backup |
| TRIM & TILT | Manual |
| FUEL DELIVERY | Electronic Fuel Injection EFI |
| FUEL TANK | External |
| CYLINDER(S) | 2 |
| DISPLACEMENT | 209 cc (12.8 cubic inches) |
| BORE AND STROKE | 55 x 44 mm (2.16 x 1.73 inches) |
| FULL THROTTLE RPM RANGE | 5000-6000 |
| IGNITION SYSTEM | Digital CD Ignition w/Electronic Spark Advance |
| INDUCTION SCAVENGING | SOHC |
| VALVES PER CYLINDER | 2 |
| FUEL TYPE | 87 Octane (up to 10% ethanol content) |
| FUEL TANK / FUEL LINE | 3.2 Gal. Fuel Tank + Quick Connect Fuel Line |
| OIL TYPE | SAE 10W-30 (Mercury 4-Stroke Outboard Oil) |
| OIL CAPACITY | 27 fl. Oz. (800 ml) |
| LUBRICATION | Trochoid Pump |
| ALTERNATOR | 6A, 76 Watt |
| COOLING SYSTEM | Water-cooled with thermostat |
| SALTWATER RATED | Yes |
| GEAR RATIO | 2.42:1 |
| GEAR SHIFT | Forward-Neutral-Reverse (shift in tiller handle) |
| PROPELLER | 4-Blade High Thrust Aluminum |
IN THE BOX
- Fuel Tank (3.2 gallon)
- Quick Connect Fuel Line
- Mercury 3-Year Warranty
- Aluminum Propeller
- Mercury 4-Stroke Oil
- Owner’s Manual & Tool Kit
SHAFT LENGTH GUIDELINES





















