Stihl FC 75 - Ignition System Specifications; Gearbox Specifications

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
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