Model | N | 6 | 8 | 8B | 81302 | 14 | 143302 |
---|---|---|---|---|---|---|---|
Point Gap | .020 All models | ||||||
Plug Gap | .030 All models | ||||||
Arature Gap | - | ||||||
3 leg | .012-.016 | .012-.016 | .012-.016 | .012-.016 | .012-.016 | - | .012-.016 |
2 leg | - | - | - | .006-.010 | .006-.010 | - | .006-.010 |
Head Bolt Torque (Inch Pounds) |
140 | 140 | 140 | 140 | 140 | 165 | 165 |
Bore | - | ||||||
Nominal |  1.999-2.000  |  1.999-2.000  |  2.249-2.250  |  2.374-2.375  |  2.624-2.625  |  2.374-2.375  |  2.749-2.750  |
Resize | .003 oversize or .0015 out of round | ||||||
Piston Reject Size | - | ||||||
Ring Side Clearance | .007 | .007 | .007 | .007 | .007 | .009 | .009 |
Wrist Pin Bore | .491 | .491 | .491 | .491 | .491 | .673 | .673 |
Rod Reject Size | - | ||||||
Wrist Pin | .492 | .492 | .492 | .492 | .492 | .674 | .674 |
Crankpin | .751 | .751 | .751 | 1.001 | 1.001 | 1.001 | 1.095 |
Rod Bolt Torque (Inch Pounds) |
100 | 100 | 100 | 100 | 100 | 190 | 165 |
Crankshaft Reject Size | - | ||||||
PTO | .8736 | .873 | .873 | .873 | .873 | 1.179 | 1.179 |
Crankpin | .747 | .743 | .743 | .996 | .996 | .996 | 1.090 |
Magneto | .8736 | .873 | .873 | .873 | .873 | 1.179 | .997 |
Crankshaft End Play | .002-.008 All models | ||||||
Bearing Reject Size | .878 | .878 | .878 | .878 | .878 | 1.185 | 1.185 PTO 1.004 Mag |
Camshaft Reject Size | - | ||||||
Journal | .372 | .372 | .372 | .498 | .498 | .497 | .498 |
Lobe | .867 | .875 | .875 | .883 | .883 | 1.115 | .977 |
Valve Tappet Clearance | - | ||||||
Intake | .007-.009 | .007-.009 | .007-.009 | .005-.007 | .005-.007 | .007-.009 | .005-.007 |
Exhaust | .014-.016 | .014-.016 | .014-.016 | .007-.009 | .007-.009 | .014-.016 | .009-.011 |
Valve Margin | 1/64" minimum all models | ||||||
Valve Seat Width | 3/64"-1/16" all models |