Checking The Spark Plug - Yamaha C3 2008 Owner's Manual

Spark plug, checking<IXE>
PERIODIC MAINTENANCE AND ADJUSTMENT
Panel C
To remove the panel
1
2
3
4
ZAUM00**
1. Panel C
5
1. Open the seat. (See page 3-8.)
2. Remove the screws, and then take
6
the panel off.
7
To install the panel
Place the panel in the original position,
8 and then install the screws.
9

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 mainte-
1
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Remove panel A. (See page 6-6.)
2. Remove the spark plug cap.
1
ZAUM00**
1. Spark plug wrench
EAUT2070 3. Remove the spark plug as shown,
To check the spark plug
1. Check that the porcelain insulator
TIP
If the spark plug shows a distinctly dif-
ferent color, the engine could be operat-
ing improperly. Do not attempt to diag-
nose such problems yourself. Instead,
have a Yamaha dealer check the vehicle.
2. Check the spark plug for electrode
6-42 6-7
with a spark plug wrench available
at a Yamaha dealer.
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
erosion and excessive carbon or
other deposits, and replace it if nec-
essary.
Specified spark plug:
CR7E (NGK)
EAU1722A