2018 Mercury 20 Hp 20MH Outboard Motor

The 2018 Mercury 20 HP 20MH Outboard Motor is a manual-start, tiller-steered engine on a 15-inch short shaft, with manual tilt and a 115-pound dry weight. Manual start on a 20 HP block Pull-cord starting keeps this motor simpler than the electric-start 20EH built on the same 20 HP engine, and without a starter or battery to wire in, it is also lighter. An optional 12-amp, 138-watt alternator can be added for owners who want charging capability without stepping up to the electric-start model. Fitment Matching this short shaft to the right transom matters more than most buyers expect; mounted too low, a 15-inch shaft like this one leaves the gearcase and prop too shallow, and a boat built for Mercury's 20-inch long-shaft version will not get full performance from it. Tiller steering keeps throttle and shift at the handle rather than routing them to a console. Why some owners skip electric start A manual-start outboard like this one has fewer parts that can fail, since there is no starter motor, solenoid, or battery wiring in the circuit; for a backup motor or a boat used only occasionally, that simplicity can matter more than the convenience of turning a key. Servicing a carbureted 20 HP engine Keeping the fuel system clean matters on any carbureted outboard, and running the tank low before long storage periods, then refilling with fresh fuel, is a simple habit that avoids most of the hard-starting complaints owners report after a winter of sitting. Common questions Can I add charging capability? Yes, an optional 12-amp, 138-watt alternator is available for this model. What is the gear ratio? 2.15:1, and this new motor carries Mercury's standard three-year warranty. Specifications MODEL 20MH MODEL YEAR 2018 SKU 20MH-18 WEIGHT 115.0000 MANUFACTURER Mercury COUNTRY OF MANUFACTURE Japan HORSEPOWER 20hp SHAFT LENGTH 15″ (Short) STEERING Tiller STARTING Manual TRIM & TILT Manual FUEL DELIVERY Carburetor FUEL TANK External CYLINDER(S) 2 DISPLACEMENT 21.4 / 351 BORE AND STROKE 2.40 x 2.36in 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 6.6 / 25 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 INTERNAL BATTERY No