Fast throttle response and fast acceleration are features designed into the 20 HP EFI Mercury Outboard. With powerful low end torque and a large displacement your boat planes faster and you get to your destination across the water faster thanks to Mercury engineering. At 103 lbs. the Mercury 20 HP EFI model 20MH is your affordable choice in the 20 HP line up with a manual start and the 15 inch short shaft. The 20MH also includes manual tilt, a heavy duty transom bracket, vibration absorbing mounts and Mercury’s multi function tiller. Mercury outboards come with a 3-year factory warranty that starts on day of purchase.
Additional information
| Horsepower | 20 HP |
|---|---|
| Shaft Length | 15″ (Short) |
| Starter Type | Manual |
| Tilt & Trim | Manual |
FEATURES
- Large Displacement Powerhead (351cc)
- Thru-Cowl Backup Manual Start
- Digital CD Ignition with Spark Advance
- Tuned Intake for Quick Acceleration
- 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
- Heavy Duty Transom Mounting Bracket
- Quiet Through-Propeller-Hub Exhaust
- “Wishbone” Mount for Reduced Vibration
- 3.2 Gallon Fuel Tank and Fuel Line
- Easy Maintenance Canister Oil Filter
- 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 | 20HP EFI 20MH |
|---|---|
| MODEL YEAR | 2021 |
| SKU | 20MH-21EFI |
| WEIGHT | 103.0 lb |
| MANUFACTURER | Mercury |
| COUNTRY OF MANUFACTURE | Japan |
| HORSEPOWER | 20hp |
| SHAFT LENGTH | 15″ (Short) |
| STEERING | Tiller |
| STARTING | Manual |
| TRIM & TILT | Manual |
| FUEL DELIVERY | EFI |
| FUEL TANK | External |
| CYLINDER(S) | 2 |
| DISPLACEMENT | 333 cc (20.3 cubic inches) |
| BORE AND STROKE | 61 mm x 57 mm (2.402 in. x 2.244 in.) |
| FULL THROTTLE RPM RANGE | 5400-6100 |
| IGNITION SYSTEM | CDI w/electronic spark advance |
| INDUCTION SCAVENGING | SOHC |
| VALVES PER CYLINDER | 2 |
| FUEL TYPE | 87 octane/up to 10% ethanol |
| FUEL TANK / FUEL LINE | 3.2 Gallon/12 Liter |
| OIL TYPE | Mercury 4-Stroke Outboard Oil |
| OIL CAPACITY | 1 Quart (1000 ml) |
| LUBRICATION | Trochoid Pump |
| ALTERNATOR | Optional 12 amp / 138 watt (Electric) |
| COOLING SYSTEM | Water-cooled with thermostat |
| SALTWATER RATED | Yes |
| GEAR RATIO | 2.15 |
| GEAR SHIFT | Forward-Neutral-Reverse |
| PROPELLER | 9.2″ Diameter X 9.1″ Pitch 3-Blade 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

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