Specifications

84
OHH and OHSK80 - 110 OHM, OHSK, OVM, OHV13.5 - 17
OHSK55 - 70 OVXL120,130
Specifications Note (D) & OHV11-13
Standard Metric Standard Metric Standard Metric Standard Metric
English mm English mm English mm English mm
Displacement (in
2
) (cc) 11.9 195.04 19.43 318.46 21.82 357.63 29.9 490.06
Stroke 1.938 49.225 2.532 70.993 2.532 70.993 3.00 76.6
Bore 2.795 70.993 3.125 79.375 3.312 84.125 3.562 90.475
2.796 71.018 3.126 79.400 3.313 84.150 3.563 90.500
Ignition Module Air Gap .0125 .3175 .0125 .3175 .0125 .3175 .0125 .3175
Spark Plug Gap .030 .762 .030 .762 .030 .762 .030 .762
Valve Clearance In./Ex. .004 .1016 .004 .1016 .004 .1016 .004 .1016
.004 .1016 .004 .1016 .004 .1016 .004 .1016
Valve Seat Angle 46
0
46
0
46
0
46
0
Valve Seat Width .035 .889 .035 .889 .035 .889 .042 1.0671
.045 1.143 .045 1.143 .045 1.143 .052 1.321
Valve Guide Oversize .2807 7.130 .3432 8.717 .3432 8.717 .3432 8.717
Dimension .2817 7.155 .3442 8.743 .3442 8.743 .3442 8.743
Crankshaft End Play .006 .1524 .002 .051 .002 .051 .0025 .064
.027 .6858 .042 .067 .042 .067 .0335 .851
Note (C) Note (C)
Crankpin Journal Dia. .9995 25.362 1.3740 34.900 1.3740 34.900 1.6223 41.206
1.000 25.400 1.3745 34.912 1.3745 34.912 1.6228 41.219
Crankshaft Dia. Flywheel .9985 25.362 1.3745 34.912 1.3745 34.912 1.6245 41.262
End Main Brg. .9990 25.375 1.3750 34.925 1.3750 34.925 1.6250 41.275
Crankshaft Dia. .9985 25.362 1.3745 34.912 1.3745 34.912 1.6245 41.206
P.T.O. Main Brg. .9990 25.375 1.3750 34.925 1.3750 34.925 1.6250 41.275
Conn. Rod Dia. Crank Brg. 1.0005 25.413 1.3775 34.988 1.3775 34.988 1.6234 41.234
1.0010 25.425 1.3780 35.001 1.3780 35.001 1.6240 41.250
Camshaft Bearing Diameter .4970 12.624 .6230 15.824 .6230 15.824 .6235 15.837
.4975 12.637 .6235 15.837 .6235 15.837 .6240 15.850
Piston Dia. Bottom of Skirt 2.7904 70.876 3.1195 79.235 3.3095 84.061 3.5595 90.411
2.7920 70.917 3.1205 79.261 3.3105 84.087 3.5605 90.437
Ring Groove Side Clearance .0020 .051 .0020 .051 .0020 .051 .0020 .051
1st & 2nd Comp. .0050 .127 .0040 .127 .0040 .127 .0040 .127
Ring Groove Side Clearance .0050 .013 .0010 .0254 .0010 .0254 .0009 .0229
Bottom Oil .0035 .089 .0030 .076 .0030 .076 .0029 .074
Piston Skirt to Cylinder .0030 .076 .0015 .038 .0015 .038 .0015 .038
Clearance .0056 .142 .0035 .089 .0035 .089 .0030 .089
Ring End Gap .007 .178 .010 .254 .010 .254 .012 .305
.017 .432 .020 .508 .020 .508 .022 .559
Cylinder Main Bearing 1.0005 25.413 1.3765 34.963 1.3765 34.963 1.6265 41.313
Diameter 1.0010 25.425 1.3770 34.976 1.3770 34.976 1.6270 41.326
Cylinder Cover / Flange 1.0050 25.413 1.3765 34.963 1.3765 34.963 1.6265 41.313
Main Brg. Diameter 1.0010 25.425 1.3770 34.976 1.3770 34.976 1.6270 41.326
Note A: OVRM60, 21000 spec. numbers with a "B" suffix and all OVRM 65, 22000 spec. numbers have a displacement
of 11.9 (195.04).
Note B: All OVRM 60, 21000 spec. numbers with a "B" suffix and all OVRM 65, 22000 spec. numbers have a
2.795"/2.796 (70.993/71.018) Bore.
Note C: All engines equipped with a ball bearing will have "0" End Play.
Note D: For OHSK110 models with specification number starting with 223000 have a displacement of
21.82 ( 357.63 cc).
ENGINE SPECIFICATIONS (Continued)
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