STIHL 064, 066 7
1.5 Tightening Torques
Fastener Thread size For component Torque Remarks
Nm (Ibf.ft)
Spline screw IS-M5x20 Crankcase 9.0 (6.6)
Spline screw IS-M5x20 Cylinder 12.0 (8.8)
Spline screw IS-M6x20 Cylinder 15.0 (11.8) 4)
Spline screw IS-M5x12 Muffler to cylinder 10.0 (7.5) 1)2)
Spline screw IS-M6x20 Muffler to cylinder 15.0 (11.0) 4)
Spline screw IS-M5x6 Muffler upper casing (top) 11.0 (8.1) 1)2)
Spline screw IS-M5x12 Muffler upper casing (bottom) 8.0 (5.9) 1)2)
Spline screw IS-M5x20 Ignition module 9.0 (6.6) 1)2)
Nut M8x1 Crankshaft (flywheel) 33.0 (24.3)
Flange locknut VM 5 Carburetor 3.5 (2.6)
Spline screw IS-M4x16 Shroud 3.0 (2.2) 1)2)
M12x1 L Clutch carrier 50.0 (37.0)
M14x1.25 Spark plug 25.0 (18.5)
Spline screw IS-6x19 Annular buffer (top) 3.5 (2.6)
Spline screw IS-6x19 Annular buffer (bottom) 7.0 (5.2)
Spline screw IS-5.8x19 Front handle 7.0 (5.2) 2)3)
Self-tapping screw B3.9x19 Handle molding 1.0 (0.75)
Spline screw IS-M5x12 Annular buffer plate 9.0 (6.6) 1)
Spline screw IS-M5x16 Chain catcher 7.0 (5.2)
Spline screw IS-M5x12 Spiked bumper (top) 7.0 (5.2)
Spline screw IS-M5x16 Chain catcher pin
to spiked bumper 6.0 (4.4)
Spline screw IS-M5x12 Rubber buffer to crankcase 3.5 (2.6)
Locknut M5 Spiked bumper to sprocket cover 8.0 (5.9)
Pan head screw BM3x8 Guard in sprocket cover 1.0 (0.75)
Pan head screw M3.5x12 Generator (heating) 2.0 (1.5)
Pan head screw M4x12 Cover (chain tensioner) 3.5 (2.6)
Spline screw IS-M4x12 Oil pump 3.0 (2.2)
Spline screw IS-M4x12 Cover (chain brake) 2.0 (1.5)
Spline screw IS-M5x18 Fan housing 3.5 (2.6)
Spline screw IS-M5x12 Starter post in fan housing 6.0 (4.4)
Starter post M8 Fan housing 6.0 (4.4)
Screw assy. IS-M5x30 Hand guard (left) 7.0 (5.2) 1)
Pan head screw M4x8 Inner side plate 3.0 (2.2)
Collar stud M8 Guide bar mounting 15.0 (11.0) 1)
Remarks:
1) Screw must be secured with adhesive 0786 111 1101 (Loctite 242).
2) Washer must be fitted under screw head. On front handle, fit washer under heads of side screws only.
3) Screw must be secured with adhesive 0786 111 1117 (Loctite 648).
4) Model 066 only.
Note: Screws secured with adhesive are easier to release if the adhesive is heated first with a hot air blower
(hair dryer). Exercise caution on polymer components.
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