Stihl FS 80 Service Manual

6 FC 75, FC 85, FH 75, FS 75, FS 80, FS 85, HL 75, KM 85, KW 85
Fastener Thread size For component Torque Remarks
lbf.ft Nm
Screw IS-DG5x12 AV sleeve/drive tube, location 0.37 0.5
Screw IS-DG5x60 Retainer/deflector/drive tub 1.5 2.0 8)
Screw IS-M6x35 Clamp/clamp block/clamp
(bike handle) 3.3 4.5 2)7)
Tommy screw M6x30 Coupling sleeve/tommy screw
(version with split boom) 4.4 6.0 2)7)
Screw IS-M6x25 Coupling sleeve/clamp nut
(version with split boom) 6.6 9 2)7)
M8 Clutch carrier/flywheel/
crankshaft 19.2 26.0
Screw IS-M5x16 Fan housing/crankcase 5.9 8.0
Screw IS-M6x25 Clamp/loop handle
(loop handled machine) 3.3 4.5 2)4)6)7)
Nut M5 DS270 mm blade/screw 7.0 9.5 6)
M8 Carrier 10.3 14.0
Collar nut P3.5x9.0 Detent spring/slide control/control handle 1.5 1.1 2)7)
Screw IS-M5x22 Clamp/drive tube/harness adjustment
(version with split boom) 2.2 3.0 2)7)
Screw IS-P5.5x12 Rope rotor/starter cover 2.6 3.5
Screw IS-5x33 Clamp/deflector 3.3 4.5 1)
Screw IS-5x16 Muffler/crankcase 7.0 9.5
Screw IS-5x16 Muffler/cylinder 8.5 11.5
Screw IS-M6x14 Clamp/drive tube/harness adjustment 3.3 4.5 2)5)7)
Screw IS-M5x18 Clamp/bearing housing/locknut
4.8 6.5 1)
Screw IS-M5x16 Starter cover/crankcase 4.0 5.5
Screw IS-M5x22 Carrying ring/clamp 2.2 3.0 4)6)
Screw IS-M5x25 Spacer flange/cylinder (with washer) 4.0 5.5
Screw IS-DG5x24 Cylinder/crankcase 7.0 9.5
Spark plug M14x1.25 Spark plug 15.0 20.0
Screw IS-M4x20 Ignition module/cylinder (with washer) 3.3 4.5
Screw IS-M5x25 Spacer flange/cylinder (with washer) 4.0 5.5

Stihl FS 80 Specifications

General

Engine Type	2-stroke
Displacement	25.4 cc
Cutting Diameter	420 mm
Shaft Type	Straight
Starter	Recoil
Sound Power Level	106 dB(A)
Fuel Capacity	0.44 liters
Vibration Level	4.5 m/s²