Mariner Mercury 105/140 JET, Service Manual

Page: 372 / 797

90-824052R3 JUNE 2002 POWERHEAD - 4A-1
Powerhead Specifications
Block
Type 60
°
V, 2 Cycle . . . . . . . . . . . . . . . . . . . . .
Displacement
135 and 150
122 cu. in. (2.0 Litre) . . . . . . . . . . . .
175, XR6/Mag III, 200 153 cu. in. (2.5 Litre) . . . .
Reed Valve Opening
Reed Stand Open (Max.) 0.020 in. (0.50 mm) . . .
Cylinder Bore
(105 Jet, 135, 150)
Dia. Standard 3.125 in. (79.375 mm) . . . . . . . . .
Dia. .015 in. Oversize 3.140 in. (79.756 mm) . . .
Dia. .030 in. Oversize 3.155 in. (80.137 mm) . . .
(140 Jet, 175, XR6/Mag III, 200, 150XRI, 175XRI,
200XRI, Pro Max/Super Magnum 150, 200, 225)
Dia. Standard 3.501 in. (88.925 mm) . . . . . . . . .
Dia. .015 in. Oversize 3.516 in. (89.306 mm) . . .
Taper/Out of Round Max. 0.006 in. (0.152 mm)
Piston
(105 Jet, 135, 150)
Dia. Standard 3.115 in.
±
.002 in. . . . . . . .
(79.121 mm
±
.051 mm)
Dia. .015 in. Oversize 3.130 in.
±
.002 in. .
(79.502 mm
±
.051 mm)
Dia. .030 in. Oversize 3.145 in.
±
.002 in. .
(79.883 mm
±
.051 mm)
(140 Jet, 175, XR6/Mag III, 200, 150XRI, 175XRI,
200XRI, Pro Max/Super Magnum 150, 200, 225)
Dia. Standard 3.494 in.
±
.001 in. . . . . . . .
(88.748 mm
±
.025 mm)
Dia. .015 in. Oversize 3.509 in.
±
.001 in. .
(89.129 mm
±
.025 mm)
Compression
All Models – Using a fully charged battery,
throttle shutters wide open and cylinder block
warm – 110 – 135 psi (753.3 – 924.5 kPa)
Variance between cylinders should not exceed
15 psi (102.7 kPa)
IMPORTANT: Using a micrometer, measure di-
mension “B” at location shown. Dimension “B”
should be .008 in. or less than dimension “A”.
Dimension “A”
at Right Angle
(90
°
) to Piston
Pin
Dimension “B” ( in
line with Piston Pin)
1/2 in.
(12.7mm)