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| Home / Outboard Engines / Mercury Engines / Mercury 6 Hp |
Mercury 6 Hp Specifications
The Mercury 6 is a two-stroke two-cylinder gasoline outboard engine with a rated power of 6 hp (4.5 kW) at 4000-5000 rpm. The engine cylinder bore is 2.13 in (53.98 mm) and piston stroke is 1.8 in (45.7 mm). The outboard motor has a fixed main jet WMC carburetor, cross-flow fuel induction system, integral type fuel pump, water cooled with thermostat, manual or electric starting system, and capacitor discharge ignition system. The remote fuel tank capacity is 3.2 gal (12 liters). The propeller is made of aluminum and it has three blades.
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| General Technical Data |
Engine Model .................... Mercury 6 Hp
Engine Type .................... 2-stroke 2-cylinder gasoline outboard engine
Number of Cylinders .................... Two
Displacement, cu.in (cc) .................... 12.8 (209)
Cylinder Bore, in (mm) .................... 2.13 (53.98)
Piston Stroke, in (mm) .................... 1.80 (45.70)
Maximum Engine Power, hp (kW) .................... 6.0 (4.5)
Maximum Engine Speed, rpm .................... 4000-5000
Idle Speed, rpm .................... 650±75
Firing Order .................... 1-2
Ignition System .................... Capacitor discharge
Starting System .................... Manual Start / Electric Start
Exhaust System .................... Through propeller
Cooling System .................... Water cooled with thermostat
Electrical System Rating, Volts .................... 12
Charging System .................... Alternator
Alternator Rating, Amps .................... 4/6
Weight (Manual Start), lbs (kg) .................... 73 (33)
Weight (Electric Start), lbs (kg) .................... 79.5 (36)
| Fuel System |
Fuel System Type .................... Carburetor
Carburetor Type .................... Center bowl
Fuel Pump Type .................... Integral
Fuel Induction System .................... Cross-flow
Fuel Type .................... Pre-mixed gasoline and oil
Recommended Gasoline .................... Automotive unleaded with a min pump posted octane rating of 86
Recommended Oil .................... 2-cycle outboard oil
Operating Fuel/Oil Ratio .................... 50:1
| Gear Housing |
Gear Shift .................... F-N-R on Tiller Handle
Gear Ratio .................... 2.0:1
Number of Teeth (Forward Gear, Spiral/Bevel) .................... 26
Number of Teeth (Pinion Gear, Spiral/Bevel) .................... 13
Pinion Height .................... Floating
Forward Gear Backlash .................... No Adjustment
Reverse Gear Backlash .................... No Adjustment
Water Pressure / RPM, psi (kPa) .................... 5-7 (34.5-48.3) / 5000
Water Pressure / RPM, psi (kPa) .................... 0.5-1.5 (3.4-10.3) / 750
| Mid Section |
Transom Height (Short Shaft), in (mm) .................... 15 (380)
Transom Height (Long Shaft), in (mm) .................... 20 (510)
Transom Height (Extra Long Shaft), in (mm) .................... 25 (635)
Total Tilt Angle, deg .................... 78
Tilt Pin Adjustment Positions .................... 3+3 Shallow water
Steering Pivot Range, deg .................... 78
Allowable Transom Thickness (Max), in (mm) .................... 2.37 (60.3)
| Cylinder Block |
Cylinder Block Type .................... 2-Stroke cycle - cross flow
Cylinder Bore Type .................... Cast iron
Cylinder Bore Inside Diameter (Std), in (mm) .................... 2.13 (53.98)
Cylinder Bore Inside Diameter (Max), in (mm) .................... 2.134 (54.082)
Cylinder Bore (Max Out of Round), in (mm) .................... 0.004 (0.1016)
Cylinder Bore (Max Taper), in (mm) .................... 0.004 (0.1016)
Crankshaft Main Bearing Journal (Top), in (mm) .................... 0.7517 (19.1)
Crankshaft Main Bearing Journal (Center), in (mm) .................... 0.8108 (20.59)
Crankshaft Ball Bearing Journal (Bottom), in (mm) .................... 0.7880 (20.0)
Connecting Rod Journal, in (mm) .................... 0.8125 (20.6)
Crankpin End (Inside Diameter), in (mm) .................... 1.0635 (27.0)
Crankshart Runout (Maximum), in (mm) .................... 0.003 (0.076)
Piston Type .................... Aluminum
Piston Pin End (Inside Diameter), in (mm) .................... 0.8195 (20.8)
Piston Ring End Gap, in (mm) .................... 0.010-0.018 (0.25-0.46)
Reed Type .................... Steel
Reed Stand Open (Maximum), in (mm) .................... 0.007 (0.178)
Reed Stop Opening (Maximum) .................... 0.296 (7.54)
| Propeller Information |
Diameter, in (mm) .................... 9 (229) / 9.75 (248)
Pitch, in (mm) .................... 8 (203) / 6.5 (165)
Number Of Blade .................... 3
Material .................... Aluminum
Typical Gross Boat Weight, lbs (kg) .................... 1000-2200 (455-1000)
Typical Boat Length, in (mm) .................... 12-16 (305-406)
Speed Range, mph (kph) .................... 8-15 (12.8-24.1) / 3-10 (4.8-16.1)
| Maintenance Data |
Engine Fuel Type .................... Unleaded 86 octane minimum
Engine Oil Type .................... 2-cycle outboard oil
Engine Oil Capacity, gal (L) .................... 3.2 (12.0)
Gearcase Capacity, qts (L) .................... 0.21 (0.20)
Spark Plug Type .................... NGK BP8H-N-10
Spark Plug Gap, in (mm) .................... 0.040 (1.0)
Ignition Timing (Idle), deg .................... 8±1 BTDC
Ignition Timing (Maximum), deg .................... 36 BTDC
| Carburetor Adjustments |
Idle Mixture Screw (WMC-20B) .................... 1-3/8±1/4 turn
Idle Mixture Screw (WMC-57 or WMC-66) .................... 1-1/4±1/4 turn
Float Level, in (mm) .................... 1.0 (25.4)
Main Jet Size, in (mm) .................... 0.042 (1.07)
Low Idle Speed, rpm .................... 650±75
Wide Open Throttle, rpm .................... 4000-5000
| Service Intervals |
Lubricate all lubrication points .................... Every 100 hours
Inspect and clean spark plugs .................... Every 100 hours
Check engine fuel line filter .................... Every 100 hours
Check carburetor adjustments .................... Every 100 hours
Check corrosion control anodes .................... Every 100 hours
Drain and replace gear case lubricant .................... Every 100 hours
Lubricate splines on the drive shaft .................... Every 100 hours
Inspect battery condition .................... Every 100 hours
Check control cable adjustments .................... Every 100 hours
Check tightness of bolts, nuts, and other fasteners .................... Every 100 hours
Replace water pump impeller .................... Every 300 hours
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| Engines Technical Specifications |