Torque Values

GX160/200
Item Thread dia.
(mm)
Torque
(ft-lbs)
Connecting rod bolt M7 x 1.0 9
Cylinder head bolt M8 x 1.25 17
Flywheel nut (special nut) M14 x 1.5 54
Rocker arm pivot lock nut (special nut) M6 x 0.5 7
Rocker arm pivot bolt M8 x 1.25 17
Crankcase cover bolt M8 x 1.25 17
Muffler mounting nuts M8 x 1.25 17
When installing aftermarket parts use manufacturer's torque values



GX340/390
Item Thread dia.
(mm)
Torque
(ft-lbs)
Connecting rod bolt M8 x 1.25 10
Cylinder head bolt M10 x 1.25 25
Flywheel nut (special nut) M16 x 1.5 83
Rocker arm pivot lock nut (special nut) M6 x 0.5 7
Rocker arm pivot bolt M8 x 1.25 17
Crankcase cover bolt M8 x 1.25 17
Muffler mounting nuts M8 x 1.25 17
When installing aftermarket parts use manufacturer's torque values