________________________________________________________________________________________

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.

____________________________________________________________________________________

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

________________________________________________________________________________________

________________________________________________________________________________________

Engines Technical Specifications
BMW M20B23 BMW M40B18 BMW M43B16 BMW M50B24TU
TOYOTA 3VZ-E TOYOTA 1AZ-FE TOYOTA 1G-FE TOYOTA 1JZ-GE
NISSAN HR12DE NISSAN A12 NISSAN A15 NISSAN CA18DET
BRIGGS 28S777 BRIGGS 31H777 BRIGGS 31P977 BRIGGS 31Q777
MERCURY 150 MERCURY 175 XRI MARINER 135 MERCURY 200 EFI
KAWASAKI FH430V KAWASAKI FR600V KAWASAKI FX541V KAWASAKI FD611V
HONDA GC135 HONDA GCV160 HONDA GS190 HONDA GX340
KUBOTA D1305 KUBOTA D1503 KUBOTA V1903 KUBOTA 2003T
KOHLER CH18S KOHLER CH680 KOHLER CV460S KOHLER SV735S