KEEWAY F-ACT EVO Instruction & Maintenance Manual page 18

Spark plug electrode is moist
Check if there is oil leaking from
carburetor
Yes
1. Check if there is gap
between the carburetor float
needle valve and valve seat
because of other materials
2. Check if the conical
surface of the carburetor
float needle valve is worn
into step shape
3. Check if the carburetor
float breaks
4. Check if the carburetor
float is too low
1. Check if there is gas leaking
in external connections of the
engine
2. Check if the piston ring sticks
in ring groove or insufficient
elasticity
3. Check the wearability of
piston ring and cylinder
Remove the
spark plug to
test
No
Check if the air
cleaner blocks
- 17 -
Spark plug electrode is dry
Instill small amount of fuel into the cylinder to
have an experimental starting
The engine stops after
running a very short time
The carburetor inside
blocks or the float is
too high
1. Check if the venthole of
fuel tank cover blocks
2. Check if the fuel filter and
fuel cock block
3. Check if the fuel cock
works well
4. Check if the carburetor inlet
port blocks
5. Check if the carburetor
floater is too high
Work continuously after
starting
Carburetor starting
device (starting richer
system) fails