SERVICE INFORMATION
2-3
EG4500CX/EG5000CX
Unit: mm (in)
Part Item Standard Service limit
Engine Engine
speed
Except EG5000CX
SH/SKH/LDH type
3,000 ± 100 min
-1
(rpm) –
EG5000CX
SH/SKH/LDH type
3,600 ± 100 min
-1
(rpm) –
Cylinder compression
1.37 MPa (14 kgf/cm
2
, 199 psi)
at 1,400 min
-1
(rpm)
–
Cylinder Sleeve I.D. 82.000 – 82.017 (3.2283 – 3.2290) 82.17 (3.235)
Cylinder head Warpage – 0.10 (0.004)
Piston Skirt O.D. 81.965 – 81.985 (3.2270 – 3.2277) 81.85 (3.222)
Piston-to-cylinder clearance 0.015 – 0.052 (0.0006 – 0.0020) 0.12 (0.005)
Piston pin bore I.D. 20.002 – 20.008 (0.7875 – 0.7877) 20.042 (0.7891)
Piston pin Pin O.D. 19.994 – 20.000 (0.7872– 0.7874) 19.950 (0.7854)
Piston pin-to-piston pin bore clearance 0.002 – 0.014 (0.0001 – 0.0006) 0.08 (0.003)
Piston rings Ring side
clearance
Top 0.030 – 0.060 (0.0012 – 0.0024) 0.15 (0.006)
Second 0.030 – 0.060 (0.0012 – 0.0024) 0.15 (0.006)
Ring end gap Top 0.200 – 0.350 (0.0079 – 0.0138) 1.0 (0.04)
Second 0.350 – 0.500 (0.0138 – 0.0197) 1.0 (0.04)
Oil (side rail) 0.20 – 0.70 (0.008 – 0.028) 1.0 (0.04)
Ring width Top 1.160 – 1.175 (0.0457 – 0.0463) 1.150 (0.0453)
Second 1.160 – 1.175 (0.0457 – 0.0463) 1.150 (0.0453)
Connecting rod Small end I.D. 20.005 – 20.020 (0.7876 – 0.7882) 20.07 (0.790)
Big end I.D. 36.025 – 36.039 (1.4183 – 1.4189) 36.07 (1.420)
Big end oil clearance 0.040 – 0.064 (0.0016 – 0.0025) 0.12 (0.005)
Big end side clearance 0.1 – 0.4 (0.004 – 0.016) 1.0 (0.04)
Crankshaft Crank pin O.D. 35.975 – 35.985 (1.4163 – 1.4167) 35.93 (1.415)
Runout – 0.1 (0.004)
Valves Valve
clearance
IN 0.15 ± 0.02 –
EX 0.20 ± 0.02 –
Valve
stem O.D.
IN 6.575 – 6.590 (0.2589 – 0.2594) 6.44 (0.254)
EX 6.535 – 6.550 (0.2573 – 0.2579) 6.40 (0.252)
Valve guide
I.D.
IN/EX 6.600 – 6.612 (0.2598 – 0.2603) 6.66 (0.262)
Guide-to-
stem
clearance
IN 0.010 – 0.037 (0.0004 – 0.0015) 0.11 (0.004)
EX 0.050 – 0.077 (0.0020 – 0.0030) 0.13 (0.005)
Valve seat width 1.0 – 1.2 (0.04 – 0.05) 2.1 (0.08)
Valve spring free length 39.0 (1.54) 37.5 (1.48)
Valve spring perpendicularity – 1.5°
Camshaft Camshaft O.D. 15.966 – 15.984 (0.6286 – 0.6293) 15.92 (0.627)
Cam height IN 31.846 – 32.246 (1.2538 – 1.2695) 31.55 (1.242)
EX 31.567 – 31.967 (1.2428 – 1.2585) 31.27 (1.231)
Cylinder barrel Camshaft holder I.D. 16.000 – 16.018 (0.6299 – 0.6306) 16.05 (0.632)
Crankcase
cover
Camshaft holder I.D. 16.000 – 16.018 (0.6299 – 0.6306) 16.05 (0.632)
Spark plug Gap 0.70 – 0.80 (0.028 – 0.031) –
Ignition coil Air gap 0.2 – 0.6 (0.01 – 0.02) –
Carburetor Main jet # 100 –
Float height 13.2 (0.52) –
Pilot screw opening 1 – 3/4 turns out –
82Z30000.book 3 ページ ２０１０年６月２５日 金曜日 午後５時５０分
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