The Mercury portable 20 HP EFI outboard motor develops powerful low end torque to plane your boat with ease. The 20 HP Mercury outboard engine intake manifold design provides you the fast acceleration you need to move across the water quickly to your next destination. It is the perfect combination of portable power for your boating needs.
The 111 lb. Mercury 20EH model is an electric start outboard with Electronic Fuel Injection, 15 inch shaft and includes manual tilt, a heavy-duty transom bracket, vibration-absorbing wishbone mounts, and a multi-function tiller handle. Legendary Mercury reliability, fuel economy and a 3-year warranty
Additional information
| Horsepower | 20 HP |
|---|---|
| Shaft Length | 15″ (Short) |
| Starter Type | Electric |
| Tilt & Trim | Manual |
FEATURES
- Large Displacement Powerhead (351cc)
- Electric Start + 12V 138W 12A Alternator
- 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
- Auto Ratchet Tilt (6 manual trim positions)
- Shallow Water Drive
- 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 | 20 HP EFI 20EH |
|---|---|
| MODEL YEAR | 2021 |
| SKU | 20EH-21EFI |
| WEIGHT | 111.0 lb |
| MANUFACTURER | Mercury |
| COUNTRY OF MANUFACTURE | Japan |
| HORSEPOWER | 20hp |
| SHAFT LENGTH | 15″ (Short) |
| STEERING | Tiller |
| STARTING | Electric |
| 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 | 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 | 1 Quart (1000 ml) |
| LUBRICATION | Trochoid Pump |
| ALTERNATOR | 12V 138W 12A (standard on electric start models) |
| COOLING SYSTEM | Water-Cooled, Thermostatically Controlled |
| SALTWATER RATED | Yes |
| GEAR RATIO | 2.15:1 |
| GEAR SHIFT | Forward-Neutral-Reverse (shift in tiller handle) |
| PROPELLER | 9.2″ Diameter X 9.8″ 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

Honda 15HP Power Thrust Portable Outboard | BFP15D3XRT
Honda 225HP | BF225DXRA WT
Honda 8HP Power Thrust Portable Outboard | BFP8DK3XHS
Mercury Propane Outboard 5HP 5MH LPG
Honda 200HP | BF200DXRA
2021 HONDA 15 HP BF15D3SHT Outboard Motor
Honda Marine BF225DXCRC
2021 HONDA 20 HP BF20D3SH Outboard Motor
Honda Marine BF40DK4LRTC L-Type, 20 in. Shaft
Tohatsu 3.5HP Outboard | MFS3.5CL
2021 Suzuki 9.9 HP DF9.9BTHS3 Outboard Motor
Honda 200HP | BF200DLRA
2019 Honda 100 HP BF100A1XRT Outboard Motor
Mercury 20HP 20MLH EFI FourStroke Outboard
2021 HONDA 9.9 HP BF10DK3LHS Outboard Motor 