Tecumseh HH100 Handbook page 70

Model
Piston Pin Diameter
Width Comp. Ring Groove
Width Oil Ring Groove
Side Clearance Ring Groove
Ring End Gap
Top Piston Land Clearance
Piston Skirt Clearance
Camshaft Bearing Diameter
Cam Lobe Diameter Nose to Heel
Magneto Air Gap
Model
Displacement
Stroke
Bore
Timing Dimension
Point Gap
Spark Plug Gap
Valve Clearance
Valve Seat Angle
Valve Seat Width
68
U.S.
.6873
.6875
.0950
.0960
.1880
.1900
.0020
.0035
.007
.020
.0305
.0335
.002
.005
.6235
.6240
1.3045
1.3085
.006
.010
U.S.
23.7
2-3/4''
3.3120
3.3130
Solid State
Solid State
.035
Intake .010
Exhaust .020
46°
.042
.052
HH80 HH100
Metric U.S.
17.457 .6873
17.463 .6875
2.413 .0950
2.438 .0960
4.775 .1880
4.826 .1900
.051 .0020
.889 .0035
.178 .007
.508 .020
.775 .030
.851 .035
.051 .002
.127 .005
15.837 .6235
15.850 .6240
33.134 1.3045
33.326 1.3085
.152 .006
.254 .010
VH80
Metric
388.4 cc
69.85
84.125
84.150
.889
.254
.508
46°
1.067
1.321
HH120
Metric U.S. Metric
17.457 .6873 17.457
17.463 .6875 17.463
2.413 .0950 2.413
2.438 .0960 2.438
4.775 .1880 4.775
4.826 .1890 4.826
.051 .0020 .051
.889 .0035 .889
.178 .007 .178
.508 .020 .508
.762 .031 .787
.889 .036 .914
.051 .003 .076
.127 .006 .127
15.837 .6235 15.837
15.850 .6240 15.850
33.134 1.3045 33.134
33.236 1.3085 33.236
.152 .006 .152
.254 .010 .254
VH100
U.S. Metric
23.7 388.4 cc
2-3/4'' 69.85
3.3120 84.125
3.3130 84.150
Solid State
Solid State
.035 .889
.010 .254
.020 .508
46° 46°
.042 1.067
.052 1.321