Mercury 40 FourStroke User Manual

SPECIFICATIONS
90-857046R1 NOVEMBER 2001 Page 1A-3
ENRICHMENT
CONTROL
SYSTEM
Readings taken @
68°F (20°C).
Auto Enrichener Resistance
Electrothermal Ram Projection
15 - 25 Ohms (YEL/BLK - YEL/BLK)
0.3 in. (7mm) after 5 min. of power
FUEL
SYSTEM
Fuel Pump Type
Fuel Pump:
Pressure
Fuel Tank Capacity
Mechanical Water Cooled
(Plunger/Diaphragm)
3-6 psi
Accessory
CARBURETOR
Idle rpm (Out Of Gear)
Idle rpm (In Forward Gear)
Wide Open Throttle rpm (WOT)
Range
Main Jet Size
Pilot Jet
Idle Jet
Float Height
900 ± 25 rpm
800 ± 25 rpm
5500–6000
#98
#38
#42
0.47-0.63 in. (12.0-16.0 mm)
CYLINDER
BLOCK
Type
Displacement
Number of Cylinders
4 Stroke – Over Head Camshaft
45.6 cu. in. (747 cc)
3
STROKE Length 2.953 in. (75 mm)
CYLINDER
BORE
Diameter
Standard
Oversize-0.010 in. (0.25 mm)
Oversize-0.020 in. (0.50 mm)
Taper/Out of Round Maximum
Bore Type
2.5591 in. (65 mm)
2.5689 in. (65.25 mm)
2.5787 in. (65.5 mm)
0.003 in. (0.08 mm)
Cast Iron
PISTON
Piston Type
O.D. at Skirt
Standard
Oversize-0.010 in. (0.25 mm)
Oversize-0.020 in. (0.50 mm)
Aluminum
2.5570 - 2.5578 in. (64.950 - 64.965 mm)
2.5669 - 2.5675 in. (65.2 - 65.215 mm)
2.5768 - 2.5774 in. (65.450 - 65.465 mm)
PISTON
CLEARANCE
Piston to Cylinder Clearance 0.0014 - .0026 in. (0.035 - 0.065 mm)
RINGS
Ring End Gap (Installed)
Top
Middle
Bottom (Oil Ring)
Side Clearance:
Top
Middle
0.006 - 0.012 in. (0.15 - 0.03 mm)
0.012 - 0.020 in. (0.30 - 0.50 mm)
0.008 - 0.028 in. (0.20 - 0.70 mm)
0.0008 - 0.0024 in. (0.02 - 0.06 mm)
0.0008 - 0.0024 in. (0.02 - 0.06 mm)

Mercury 40 FourStroke Specifications

General

Brand	Mercury
Model	40 FourStroke
Category	Outboard Motor
Language	English