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Stihl FS 56 Service Manual

Stihl FS 56
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12 Series 4144 Components FC, FS, KM
Condition Cause Remedy
Engine will not idle, idle speed too
high
Throttle shutter opened too wide by
idle speed screw LA
Reset idle speed screw LA
correctly
Oil seals/crankcase leaking Seal or replace oil seals/crankcase
Engine stalls at idle speed Idle jet bores
or ports blocked
Clean the carburetor
Setting of low speed screw too rich
or
too lean
Reset low speed screw L correctly
Setting of idle speed screw LA
incorrect – throttle shutter
completely closed
Reset idle speed screw LA
correctly
Tank vent faulty Replace tank vent
Leak in fuel hose between tank and
fuel pump
Install new hose

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Stihl FS 56 Specifications

FS 56

Power IconPower
engine power0.8 kW (1.1 hp)
max output shaft speed8600 rpm
idle speed2800 rpm
Engine Specifications IconEngine Specifications
displacement27.2 cm³
cylinder bore34 mm
piston stroke30 mm
Fuel System IconFuel System
fuel tank capacity340 cm³ (0.34 l)
carburetor typeAll-position diaphragm carburetor with integral fuel pump
Noise and Vibration Data IconNoise and Vibration Data
sound pressure level with mowing head93 dB(A)
sound pressure level with metal tool94 dB(A)
sound power level107 dB(A)
Ignition System IconIgnition System
spark plugNGK CMR 6 H, BOSCH USR 4AC
electrode gap0.5 mm
ignition typeElectronic magneto ignition
Weight and Dimensions IconWeight and Dimensions
weight5.1 kg

FS 56 R

Noise and Vibration Data IconNoise and Vibration Data
sound pressure level with mowing head93 dB(A)
sound pressure level with metal tool94 dB(A)
sound power level107 dB(A)
Weight and Dimensions IconWeight and Dimensions
weight4.7 kg

FS 56 C

Noise and Vibration Data IconNoise and Vibration Data
sound pressure level with mowing head93 dB(A)
sound pressure level with metal tool94 dB(A)
sound power level107 dB(A)
Weight and Dimensions IconWeight and Dimensions
weight5.2 kg

FS 56 RC

Noise and Vibration Data IconNoise and Vibration Data
sound pressure level with mowing head93 dB(A)
sound pressure level with metal tool94 dB(A)
sound power level107 dB(A)
Weight and Dimensions IconWeight and Dimensions
weight4.8 kg

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