CRANKSHAFTS & CAM GEARS
Checking
CHECKING CRANKSHAFT
All Engines
Table No. 1 shows the rejection sizes of the various wear
points of the crankshaft. Discard crankshaft if worn
smaller than the size shown. Keyways should be
checked to be sure they are not worn or spread.
Remove burrs from keyway edges to prevent scratching
the bearing. Fig. 8 shows the various points to be
checked on the crankshaft.
Fig. 8. Crankshaft Check Points
NOTE: .020" undersize connecting rods may be
obtained for use on reground crankpin bearings.
Complete instructions are included with the undersize
rod. (See Service Bulletin #480 or Illustrated Parts List
to find appropriate undersize rod.)
TABLE NO. 1
CRANKSHAFT REJECT SIZES
MODEL SERIES
P.T.O. JOURNAL
MAGNETO JOURNAL
CRANKPIN JOURNAL
ALUMINUM CYLINDER
Inches
Millimeter
Inches
Millimeter
Inches
Millimeter
6B, 60000
.873
22.17
.873
22.17
.870
22.10
8B, 80000*
.873
22.17
.873
22.17
.996
25.30
82000, 92000*, 94000,
110900*, 111200, 111900*
.873
22.17
.873
22.17
.996
25.30
100000, 130000
.998
25.35
.873
22.17
.996
25.30
140000, 170000
1.179
29.95
.997#
25.32#
1.090
27.69
190000
1.179
29.95
.997#
25.32#
1.122
28.50
220000, 250000
1.376
34.95
1.376
34.95
1.247
31.67
CAST IRON CYLINDER
Inches
Millimeter
Inches
Millimeter
Inches
Millimeter
5, 6, 8, N
.873
22.17
.873
22.17
.743
18.87
9
.983
24.97
.983
24.97
.873
22.17
14, 19, 190000
1.179
29.95
1.179
29.95
.996
25.30
200000
1.197
29.95
1.179
29.95
1.122
28.50
23, 230000†
1.376
34.95
1.376
34.95
1.184
30.07
240000
Ball
Ball
Ball
Ball
1.309
33.25
300000, 320000
Ball
Ball
Ball
Ball
1.309
33.25
*Auxiliary drive models P.T.O. Bearing Reject Size -- 1.003 in. (25.48 mm)
#Synchro-Balance Magneto Bearing Reject Size -- 1.179 in. (29.95 mm)
†Gear Reduction P.T.O. -- 1.179 in. (29.95 mm)
3
