Maintenance Standards - Honda GX270UT2 Service Manual

62Z5F00Z.book 2 ページ ２０１０年６月２３日 水曜日 午後２時５７分
SERVICE INFORMATION

MAINTENANCE STANDARDS

SERVICE INFORMATION
Unit: mm (in)
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 Crank pin O.D.
Crankshaft runout
Cylinder barrel Camshaft bearing I.D.
(Crankcase)
Crankcase cover Camshaft bearing I.D.
Valves Valve clearance
Valve stem O.D.
Valve guide I.D.
Guide-to-stem clear-
ance
Valve seat width
Valve spring free length
Valve spring perpendicularity
Camshaft Cam height
Camshaft O.D.
Carburetor Main jet
Pilot screw opening
Float height
Spark plug Gap
2-2
Item
3,850 ± 150 min
1,400 ± 150 min
0.59 -0.83 MPa (6.0-8.5 kgf/cm
psi) / 600 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 0.030 – 0.060 (0.0012 – 0.0024)
Second 0.030 – 0.060 (0.0012 – 0.0024)
Top 0.200 – 0.350 (0.0079 – 0.0138)
Second 0.350 – 0.500 (0.0138 – 0.0197)
Oil (side rail) 0.2 – 0.7 (0.01 – 0.03)
Top 1.160 – 1.175 (0.0457 – 0.0463)
Second 1.160 – 1.175 (0.0457 – 0.0463)
18.005 – 18.020 (0.7089 – 0.7094)
0.1 – 0.4 (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 (0.2589 – 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)
#88
2 turns out
13.2 (0.52)
0.7 – 0.8 (0.028 – 0.031)
Standard
-1 (rpm)
-1 (rpm)
2
, 85-121
-1
(rpm)
– 0.10 (0.004)
77.17
(3.038)
76.85
(3.026)
0.12 (0.005)
18.042
(0.7103)
17.95
(0.707)
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)
– 0.1 (0.004)
16.05
(0.632)
16.05
(0.632)
6.44 (0.254)
6.40 (0.252)
6.66 (0.262)
0.10 (0.004)
0.12 (0.005)
2.0 (0.08)
–
31.35
(1.234)
31.35
(1.234)
15.92
(0.627)
Service
limit
–
–
–
–
–
37.5 (1.48)
1.5° max.
–
–
–
–