14
MS 192 T
Problem
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 stops when idling
Idle jet bores or ports blocked
Clean the carburetor
Idle jet too rich or
too lean
Set low speed screw
L
correctly
Setting of idle speed screw
incorrect – throttle shutter
completely closed
Reset idle speed screw
LA
correctly
Engine speed drops quickly under
load – low power
Air filter dirty
Clean the air filter
Throttle shutter not opened fully
Check linkage
Tank vent faulty
Clean tank vent or replace if
necessary
Fuel pick-up body dirty
Clean the pick-up body or replace if
necessary
Fuel strainer dirty
Clean fuel strainer in carburetor or
replace if necessary
Leak in fuel line between tank and
fuel pump
Seal connections or install a new
fuel line
Setting of high speed screw
H
too
rich
Turn the high speed screw
H
clockwise (leaner) – max. up to the
stop.
Main jet bores or ports blocked
Clean the carburetor
Pump diaphragm damaged or
fatigued
Fit new pump diaphragm
Impulse hose damaged or kinked
Fit new impulse hose
