Honda WX15T, Manual

Page: 13 / 100

2-2
dummyhead dummyhead
SERVICE INFORMATION
SERVICE INFORMATION
MAINTENANCE STANDARDS
ENGINE
Unit: mm (in)
PUMP
Unit: mm (in)
Part Item Standard Service limit
Engine Maximum speed (at no load) 7,800±150 min
-1
(rpm) –
Idle speed 2,500±200 min
-1
(rpm) –
Cylinder compression 0.42 MPa (4.3 kgf/cm
2
,
61 psi)/1.000 rpm
–
Cylinder Sleeve I.D. 41.800 – 41.815 (1.6457 – 1.6463) 41.900 (1.6496)
Piston Skirt O.D. 41.770 – 41.790 (1.6445 – 1.6453) 41.700 (1.6445)
Piston-to-cylinder clearance 0.010 – 0.045 (0.0004 – 0.0018) 0.120 (0.005)
Piston pin bore I.D. 10.002 – 10.018 (0.3938 – 0.3944) 10.050 (0.3957)
Piston pin Pin O.D. 9.994 – 10.000 (0.3935 – 0.3937) 9.950 (0.3917)
Piston pin-to-piston pin bore
clearance
0.002 – 0.024 (0.0001 – 0.0009) 0.100 (0.0039)
Piston rings Ring side
clearance Top/Second
0.015 – 0.056 (0.0006 – 0.0022) 0.120 (0.0047)
Ring end gap Top/Second 0.15 – 0.30 (0.006 – 0.012) 0.60 (0.0024)
Oil (side rail) 0.2 – 0.7 (0.01 – 0.03) 1.0 (0.04)
Ring width Top 0.77 – 0.79 (0.030 – 0.031) 0.72 (0.0028)
Second 0.97 – 0.99 (0.038 – 0.039) 0.92 (0.0036)
Connecting rod Small end I.D. 10.006 – 10.017 (0.3939 – 0.3944) 10.050 (0.3957)
Big end side clearance 0.1 – 0.6 (0.004 – 0.024) 0.8 (0.0031)
Big end I.D. 15.000 – 15.011 (0.5906 – 0.5910) 15.040 (0.5921)
Big end oil clearance 0.02 – 0.04 (0.001 – 0.002) 0.100 (0.0039)
Crankshaft Crankpin O.D. 14.971 – 14.980 (0.5894 – 0.5898) 14.940 (0.5882)
Cylinder barrel Journal I.D. Cam/Lifter 5.005 – 5.023 (0.1970 – 0.1978) 5.050 (0.1988)
Rocker arm 4.000 – 4.018 (0.1575 – 0.1582) 4.050 (0.1594)
Valves Valve clearance IN 0.08 ± 0.02 –
EX 0.11 ± 0.02 –
Valve stem O.D. IN 3.970 – 3.985 (0.1563 – 0.1569) 3.900 (0.1535)
EX 3.935 – 3.950 (0.1549 – 0.1555) 3.880 (0.1528)
Valve guide I.D. IN/EX 4.000 – 4.018 (0.1575 – 0.1582) 4.060 (0.1598)
Valve seat width IN/EX 0.60 – 0.80 (0.024 – 0.031) 1.0 (0.04)
Valve spring free length 23.7 (0.93) 22.8 (0.90)
Valve lifter Journal I.D. 5.005 – 5.025 (0.1970 – 0.1978) 5.050 (0.1988)
Valve lifter
shaft O.D. 4.990 – 5.000 (0.1965 – 0.1969) 4.950 (0.1949)
Cam Cam height IN/EX 27.972 (1.1013) 26.972 (1.0619)
I.D. 5.020 – 5.050 (0.1976 – 0.1988) 5.100 (0.2008)
Camshaft O.D. 4.990 – 5.000 (0.1965 – 0.1969) 4.950 (0.1949)
Crankcase
side cover Journal I.D. Cam/Lifter 5.005 – 5.023 (0.1970 – 0.1978) 5.050 (0.1988)
Rocker arms I.D. 4.005 – 4.025 (0.1577 – 0.1585) 4.050 (0.1594)
Rocker arm
shaft O.D. 3.990 – 4.000 (0.1571 – 0.1575) 3.950 (0.1555)
Carburetor Main jet # 52 –
Float height 12.0 (0.47) –
Pilot screw opening 3 turns out –
Spark plug Gap 0.60 – 0.70 (0.024 – 0.028) –
Ignition coil Air gap 0.3 – 0.5 (0.01 – 0.02) –
Primary resistance 0.99 – 1.21
Ω
–
Secondary resistance 8.1 – 9.9 k
Ω
–
Part Item Standard Service limit
Pump Impeller -Volute Clearance 0.70 – 1.00 (0.028 – 0.039) –