13
TROUBLESHOOTING GUIDE
If the engine malfunctions, carefully examine the symptoms and the operating conditions, and use the table below as a guide to
troubleshooting.
Symptom
Probable cause
Remedy
Engine won’t start
or output is low
Insufficient compression
Faulty Piston, Cylinder and Piston ring
Loose spark plug
Tighten properly.
Loose cylinder bolts
No fuel to combustion
chamber
No fuel in fuel tank
Fill fuel tank.
Blocked fuel filter or tube
Clean.
Blocked air vent in tank cap
Faulty carburetor
Spark plug fouled by fuel
Over-rich fuel/air mixture
Turn lift up lever to “RUNNING” position.
Rotate engine with spark plug removed to
discharge excess fuel.
Clean spark plug.
Clogged air cleaner
Clean.
Faulty carburetor
Incorrect grade/type of fuel
Change gasoline.
Water in fuel
No spark or weak spark
Faulty spark plug
Replace spark plug.
Faulty ignition coil
Engine switch left in “
O
” (STOP) position
Turn engine switch to “
l
” (START)
position.
Low output
Engine overheats
Clogged air cleaner
Clean.
Recoil starter or cooling air path clogged
with dirt.
Carbon built-up in combustion chamber
Poor ventilation around engine
Select a better location.
:
Service to be performed by an authorized MITOX® PRO dealer.
