Mercury 20 HP FourStroke Outboard
![]() | Introducing the 20HP FourStrokeThis is an engine which delivers top performance in a fully-featured yet lightweight and portable package. It is available with a multi-function tiller featuring Mercury's exclusive shift-in-handle design as well as providing control of steering, throttle, throttle friction and stop controls for convenient one-hand operation. Along with super-quiet performance, the engine also features a unique engine mounting system that reduces vibration which together make Mercury's new 20hp FourStroke incredibly user friendly. |
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Mercury FourStroke Outboards | 20 HP |
| HP @ Prop | 20 |
| kW @ Prop | 14.9 |
| Max RPM (WOT) | 5400-6100 |
| Cylinders | 2 (in-line) |
| Displacement (CID/cc) | 21.4/351 |
| Bore & Stroke (in) | 2.40 x 2.36 |
| Bore & Stroke (mm) | 61 x 60 |
| Cooling System | Water-cooled w/thermostat |
| Ignition System | CDI w/electric spark advance |
| Starting | Manual or electric |
| Gear Ratio | 2.15:1 |
| Gear Shift | F-N-R (Shift-in-Handle Tiller or Remote Control) |
| Steering | Tiller or remote |
| Alternator Amp | 12 Volt / 11 Amp |
| Alternator Watt | 139 |
| Trim Positions | 6 or power tilt |
| Shallow Water Drive | Standard |
| Exhaust System | Through prop |
| Lubrication System | Wet sump |
| Recommended Oil | Mercury 4-Stroke Outboard Oil |
| Oil Capacity | 1.0 L / 1.1 Qt. |
| Fuel Induction System | 2-valve single overhead cam |
| Remote Fuel Tank | Standard |
| Remote Fuel Tank (US Gal) | 6.6 |
| Remote Fuel Tank (L) | 25 |
| Shaft Length (inches) | 15 / 20 |
| Shaft Length (mm) | 381 / 508 |
| Dry Weight (lbs.) | 115 |
| Dry Weight (kg) | 52 |
| Operator Warning System | Low oil pressure / Over--rev |
| Available Propellers | Standard equipment |
| CARB Star Rating | 3 |
| Warranty | 3 Year Limited and 3 Year Limited Corrosion |




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