Checking The Spark Plug - Yamaha 135LC 2022 Owner's Manual

Checking the spark plug

The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic main-
tenance and lubrication chart. In addi-
tion, the condition of the spark plug
can reveal the condition of the engine.
To remove the spark plug
1. Place the vehicle on the center-
stand.
2. Remove panel B. (See page 7-8.)
3. Remove the coolant reservoir by
removing the screws, and then
hang it from the projection on the
cylinder head as shown.
Periodic maintenance and adjustment
EAU93862
1
1. Screw
4. Remove the spark plug cap.
7-9
1
1. Spark plug cap
5. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner's tool kit.
1. Spark plug wrench
7
1