Stihl FS 80 User Manual

2.3 Ignition system Type: Transistorized (breakerless)
magneto ignition with integrated
ballast
Air gap: 0.2 ... 0.5 mm
Ignition timing: 1.55 ... 2.25 mm before TDC at
n = 8000 rpm
Spark plug (suppressed): Bosch WSR 6F, NGK BPMR 7 A or
Champion RCJ 6Y
Electrode gap: 0.5 mm
Spark plug thread: M14 x 1.25
Length of thread: 9.5 mm
2.4 Gearbox * Type: Helical-toothed bevel gears
Gear ratio: 1.4 **
1.24 ***
Bearing: Deep groove ball bearing
Lubrication: STIHL gear lubricant
* FS 75 only has a bearing housing
** FS 80, 85
*** FC 75
4

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