FarmBoy
®
Petrol Engine
– 4-Stroke
: +91.80. 22178200
Page 33 of 36
Troubleshooting
Startup Failure or Difficulty in Startup
Situations
Causes
Remedy
The spark
plug
is
fireless.
Spark plug
Carbon deposition on the
spark plug.
Remove the deposited
carbon.
Excessive or insufficient
clearance of the spark
plug.
Adjust it to 0.6~0.7mm.
Damaged insulation of the
spark plug
Replace the spark plug.
Others
Damaged igniter
Replace the igniter.
Weak magnetic force of
the flywheel
Replace the flywheel.
The spark
plug
cannot
generate
spark.
Good
compression
Too much fuel adsorbed
in the cylinder
Screw out the spark
plug, dry it and screw it in
again.
Poor
fuel,
containing
water, too dirty
Replace the fuel
The carburetor
oil pump has
(not) the ability
to pump oil.
Blocked internal oil path
Clean or replace the
carburetor.
Normal
oil
supply but poor
compression
Worn piston ring
Replace the piston ring
Loose spark plug
Tighten the spark plug.
Air leakage at the cylinder
head,
incorrect
valve
clearance or timing
Removal, re-adjustment
or re-installation
Normal ignition
and oil supply
Poor contact between the
high-tension line and the
spark plug
Remove and reconnect
the line properly
Malfunction
or
short-
circuit of shutdown switch
Replace the shutdown
switch
Abnormal Situations during Operation:
Situations
Causes
Remedy
Rotating
speed
cannot
be
increased;
Throttle is close.
Open the throttle.
The ventilation of the muffler is not
smooth
Replace the muffler.
Moving members are worn
Inspect and replace them.
