B &S

[Matbebabe]

I have it a briggs & Stratton of 100000 Series, i have find information of 140 inc pund , when i number that too nm been that 15.93 nm.looks like to much too 5/16 bolts.

what are the realy Torque of headbolts of this engine

 

[Gordon308]

FWIW - my old Kohler K321 single cylinder engine with cast iron block & heads has 3/8" x 2.5" head bolts, and the recommended torque specs for that is 25-30 Lb/Ft = 300-360 Lb/In.

 

[Tinkerer200]

140 inch lbs is not too much for 5/16 bolts. Current spec for some B&S engines call for 200 inch lbs for 5/16 grade 8 head bolts.

I just checked the B&S Service Manual and it calls for 140 inch lbs for that series of engine. Have no idea what that is in metric.

Walt Conner

 

[StarTech]

Much easier to use online conversion programs but the formula is in/lbs x 0.112984825 = nM or in this case 140 in/lbs = 15.8178755 (15.82) nM