Mercury 5 SERIES Service Manual page 133

Section 4B - Cylinder Block and Crankcase
Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powerhead - General Information
Cylinder Block . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
Type
CYLINDER
Displacement
BLOCK
Number of Cylinders
STROKE Length
Diameter
CYLINDER
BORE
Taper/Out of Round Maximum
Bore Type
Piston Type
O.D. at Skirt
PISTON
Piston to Cylinder Clearance
PISTON
CLEARANCE
Piston Clearance Limit
Ring End Gap (Installed)
RINGS
Side Clearance:
Compression Ratio
COMPRESSION
RATIO
Outer Diameter
Diameter of Piston Pin Hole
Clearance between Piston Pin and
PISTON PIN
Piston Pin Hole
90-857138R1 MAY 2000
POWERHEAD
4B-1
4B-4
. . . . . . . . . . . 4B-5
4B-6
4B-8
4B-10
Standard
Oversize-0.020 in. (0.50 mm)
Standard
Oversize-0.020 in. (0.50 mm)
Top
Middle
Bottom (Oil Ring)
Top
Middle
Bottom (Oil Ring)
With Decompression
4/5 (1999 & 2000)
4/5 (2001 & Newer)
6 (2000 & Newer)
CYLINDER BLOCK AND CRANKCASE
Powerhead Removal . . . . . . . . . . . . . . . . . . . . .
Removing Powerhead Components
Powerhead Disassembly . . . . . . . . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powerhead Reassembly . . . . . . . . . . . . . . . . . .
Powerhead Installation . . . . . . . . . . . . . . . . . . . .
4 Stroke Cycle – Over Head Valve
7.5 cu. in. (123 cc)
1.77 in. (45 mm)
2.323 in. (59.00 mm)
2.343 in. (59.50 mm)
0.003 in. (0.076 mm)
2.321 in. (58.960 mm)
2.341 in. (59.460 mm)
0.001 - 0.002 in.
(0.020 - 0.055 mm)
0.006 in. (0.15 mm)
0.006 - 0.014 in. (0.15 - 0.35 mm)
0.012 - 0.020 in. (0.30 - 0.50 mm)
0.008 - 0.016 in. (0.20 - 0.40 mm)
0.0015 - 0.003 in. (0.04 - 0.08 mm)
0.0012 - 0.003 in. (0.03 - 0.07 mm)
0.0004 - 0.007 in. (0.01 - 0.18 mm)
42 psi 14 psi (0.29
42 psi 14 psi (0.29
0.6299 in. (16.00 mm)
0.6300 in. (16.002 mm)
0.0001 - 0.0005 in.
(0.002 mm - 0.012 mm)
4B-13
. . . . . . . . 4B-13
4B-14
4B-22
4B-31
4B-43
1
Steel
Aluminum
8.5:1
0.1 MPa)
9.5:1
0.1 MPa)
Page 4B–1
4
B