85
GB
Troubleshooting
Problem
Possible Cause
Fault Correction
Engine
does not
start
Tank empty
Fill with fuel
Incorrect starting sequence
Follow the instructions in this manu-
al on starting the machine
Engine “flooded”
Remove some gas, start several
times; remove, clean and dry the
spark plug if necessary
Sooted spark plugs, incorrect spark
gap
Clean, adjust or replace the spark
plugs
Spark connection, ignition cable
damaged
Replace
Carburettor jets dirty, incorrectly ad-
justed carburettor mix
Have the carburettor cleaned and
adjusted by a specialist workshop
Blocked fuel filter
Replace or clean the fuel filter
Engine ticks
over too
quickly
Engine cold
Warm up slowly
Engine
does not
give top
perfor-
mance
Sooted spark plugs, incorrect spark
gap
Clean, adjust or replace the spark
plugs
Dirty air filter
Clean or replace the air filter
Carburettor jets dirty, incorrectly ad-
justed carburettor mix
Have the carburettor cleaned and
adjusted by a specialist workshop
Incorrect fuel mix
Fill up according to the instructions
Sealing ring in crank case leaking
Have the fault corrected by a spe-
cialist workshop
Cylinder, piston rings worn
Incorrect ignition
Excessive
formation
of exhaust/
smoke
Incorrectly adjusted carburettor mix Have the carburettor cleaned and
adjusted by a specialist workshop
Incorrect fuel mix
Fill up according to the instructions
Summary of Contents for MTR 25
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