Perio
d
ic maintenance an
d
a
d
justment
6-42
6
EAU68070
Trou
b
leshootin
g
charts
Startin
g
pro
b
lems or poor en
g
ine performance
1. Fuel
There is enough fuel.
There is no fuel.
Supply fuel.
The engine turns over
quickly.
Operate the electric
starter.
Check the
compression.
The engine turns over
slowly.
Wipe off with a dry
cloth and correct the
spark plug gap, or
replace the spark
plug.
Check the electrolyte
and battery lead
connections, and
charge the battery if
necessary.
The engine does not
start.
Have a Yamaha
dealer check the
vehicle.
4. Battery
The battery is good.
3. Ignition
Wet
Dry
The engine does not
start.
Check the
compression.
Have a Yamaha
dealer check the
vehicle.
The engine does not
start.
Check the battery.
Remove the spark
plug and check
the electrodes.
Check the fuel level
in the fuel tank.
Operate the electric
starter.
Operate the electric
starter.
There is compression.
There is no
compression.
Have a Yamaha dealer check the vehicle.
Check the ignition.
2. Compression
UBR3E0E0.book Page 42 Friday, June 19, 2015 1:19 PM