Honda GX270H Manual page 27

62Z7B000.book 2 ページ ２０１２年９月２７日 木曜日 午前１０時２１分
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SERVICE INFORMATION
MAINTENANCE STANDARDS
SERVICE INFORMATION
GX270H
Part
Engine Maximum speed (at no load)
Idle speed
Cylinder compression
Cylinder head Warpage
Cylinder Sleeve I.D.
Piston Skirt O.D.
Piston-to-cylinder clearance
Piston pin bore I.D.
Piston pin Pin O.D.
Piston pin-to-piston pin bore clearance
Piston rings Ring side clearance
Ring end gap
Ring width
Connecting rod Small end I.D.
Big end side clearance
Big end I.D.
Big end oil clearance
Crankshaft Crankpin O.D.
Crankshaft runout
Cylinder barrel Camshaft journal I.D.
(Crankcase)
Crankcase cover Camshaft journal I.D.
Valves Valve clearance
Valve stem O.D.
Valve guide I.D.
Guide-to-stem
clearance
Valve seat width
Valve spring free length
Valve spring perpendicularity
Camshaft Cam height
Camshaft O.D.
Carburetor Main jet
Pilot screw opening
Float height
2-2
Item
3,850 ± 150 min
1,400 ± 150 min
1.37 MPa (14.0 kgf/cm
1,400 min
77.000 – 77.017 (3.0315 – 3.0322)
76.975 – 76.985 (3.0305 – 3.0309)
0.015 – 0.042 (0.0006 – 0.0017)
18.002 – 18.008 (0.7087 – 0.7090)
17.994 – 18.000 (0.7084 – 0.7087)
0.002 – 0.014 (0.0001 – 0.0006)
Top 0.015 – 0.050 (0.0006 – 0.0020)
Second 0.030 – 0.065 (0.0012 – 0.0026)
Top 0.200 – 0.350 (0.0079 – 0.0138)
Second 0.350 – 0.550 (0.0138 – 0.0217)
Oil (side rail) 0.2 – 0.7 (0.01 – 0.03)
Top 1.170 – 1.190 (0.0460 – 0.0469)
Second 1.155 – 1.175 (0.0455 – 0.0463)
18.005 – 18.020 (0.7089 – 0.7094)
0.10 – 0.40 (0.004 – 0.016)
33.025 – 33.039 (1.3002 – 1.3007)
0.040 – 0.064 (0.0016 – 0.0025)
32.975 – 32.985 (1.2982 – 1.2986)
16.000 – 16.018 (0.6299 – 0.6306)
16.000 – 16.018 (0.6299 – 0.6306)
IN 0.15 ± 0.02
EX 0.20 ± 0.02
IN 6.575 – 6.590 (0.2588 – 0.2594)
EX 6.535 – 6.550 (0.2573 – 0.2579)
IN/EX 6.600 – 6.612 (0.2598 – 0.2603)
IN 0.010 – 0.037 (0.0004 – 0.0015)
EX 0.050 – 0.077 (0.0020 – 0.0030)
1.0 – 1.2 (0.04 – 0.05)
39.0 (1.54)
IN 31.945 – 32.145 (1.2577 – 1.2655)
EX 31.666 – 31.866 (1.2467 – 1.2546)
15.966 – 15.984 (0.6286 – 0.6293)
BE70L A #85
BE70M A #92
BE75B C #85
BE75H A #88
BE78B A #85
BE98F A #90
BE98G A #92
BE98H A #92
BE70L A 2-1/8 turns out
BE70M A 2-3/4 turns out
BE75B C 2-1/8 turns out
BE75H A 2-7/8 turns out
BE78B A 2-1/8 turns out
BE98F A 2-5/8 turns out
BE98G A 2-7/8 turns out
BE98H A 2-7/8 turns out
13.2 (0.52)
Standard Service limit
-1
(rpm)
-1
(rpm)
2 , 199 psi)/
-1 (rpm)
– 0.10 (0.004)
77.17 (3.0381)
76.85 (3.026)
0.12 (0.005)
18.042 (0.7103)
17.950 (0.7067)
0.08 (0.003)
0.15 (0.006)
0.15 (0.006)
1.0 (0.04)
1.0 (0.04)
1.0 (0.04)
1.140 (0.0449)
1.140 (0.0449)
18.07 (0.711)
1.0 (0.04)
33.07 (1.302)
0.12 (0.005)
32.92 (1.296)
– 0.10 (0.004)
16.05 (0.632)
16.05 (0.632)
6.44 (0.254)
6.40 (0.252)
6.66 (0.262)
0.11 (0.004)
0.13 (0.005)
2.0 (0.08)
37.5 (1.48)
– 1.5°
31.35 (1.234)
31.35 (1.234)
15.92 (0.627)
Unit: mm (in)
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