16
3.2 Hard starting
■ Cylinder compression check
1. Remove the spark plug cap and spark plug.
2. Install a compression gauge in the spark plug hole, pull the recoil starter rope several times with
force and measure the cylinder compression.
Cylinder compression 0.45Mpa/800rpm
Check the fuel level in the tank.
dd fuel and restart the engine.
No fuel
Sufficient fuel
Loosen the drain screw and
check whether fuel reached the
carburetor.
dd fuel and restart the engine.
No fuel indicated
Good spark
Remove the spark plug and
check for wet or fouled electrode.
Check for blockage in the carbureto
port and nozzle.
Dry
Wet
Clean the electrode and restart,
taking care that the choke is no
closed too much. If flooding is severe,
chec
the carburetor float valve.
Remove the spark plug and
check for wet or fouled electrode.
Perform the ignition system
troubleshooting
No spark o
weak spark
Install a compression gauge and
check ylinder compression b
pulling the recoil starter rope
several times
1. Check the valve clearance
2. Check for carbon deposits in the
combustion chamber.
3. Check for valve cone and base.
4. Check for worn piston, piston ring
or cylinder.
Low
cylinde
ression
Install the spark plug securely.
Restart the engine according to
the starting procedure.
Good spark
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