Stihl Cutquik TS 460 Service Manual page 11

STIHL TS 460
Condition
Engine will not idle,
idle speed too high
Engine stalls at idle speed
Engine speed drops quickly
under load - low power
See also 2.2
Cause
Throttle shutter opened too
wide by idle speed adjusting screw
Idle jet bores
or ports blocked
Idle jet "too rich"
Setting of idle speed adjusting
screw incorrect - throttle shutter
completely closed
Small plastic plate in valve jet
does not close
Air filter plugged
Tank vent faulty
Leak in fuel line between tank
and fuel pump
Compensator hose to
manifold leaks
Pump diphragm damaged
or fatigued
Main jet bores or
ports blocked
Fuel pickup body dirty
Fuel strainers dirty
Remedy
Reset idle speed adjusting screw
correctly
Clean jet bores and ports with
compressed air
Screw down low speed
adjusting screw slightly
(see Carburetor Adjustment)
Set idle speed adjusting screw
correctly
Clean or renew valve jet
Clean air filter
Clean or replace tank
vent if necessary
Seal or renew connections
and fuel line
Seal connections or
replace manifold
Fit new Pump diphragm
Clean bores and ports
Fit new pickup body
Clean fuel strainers
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