Briggs & Stratton Specifications

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

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