Cleaning And Adjusting The Spark Plugs - Yamaha FZR 1800 Owner's Manual

Maintenance and care
If the throttle lever does not move smoothly or
if the throttle lever free play is not within the
specified range, have a Yamaha dealer ser-
vice the watercraft.
EJU37041
Cleaning and adjusting the spark
plugs
EWJ00350
WARNING
Be careful not to damage the insulator
when removing or installing a spark plug.
A damaged insulator could allow sparks to
escape, which could result in a fire or ex-
plosion.
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate something about
the condition of the engine. For example, if
one spark plug has a distinctly different color,
the engine could require servicing. Do not at-
tempt to diagnose any problems yourself.
Have a Yamaha dealer service the watercraft.
Remove and inspect the spark plugs periodi-
cally; heat and deposits will cause the spark
plugs to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon
and other deposits are excessive, replace the
spark plug with the specified plug.
Specified spark plug:
LFR6A
To remove a spark plug:
(1) Remove the seats. (See page 28 for seat
removal and installation procedures.)
79
(2) Remove the engine cover screws, and
then remove the engine cover.
1 Engine cover screw
2 Engine cover
(3) Remove the spark plug cap bolts, and
then remove the spark plug cap.
NOTICE: Do not use any tools to re-
move or install the spark plug cap,
otherwise the ignition coil coupler
could be damaged. The spark plug
cap may be difficult to remove be-
cause the rubber seal on the end of
the cap fits tightly. To remove the
spark plug cap, simply twist it back
and forth while pulling it up; to install
it, twist it back and forth while pushing
it down.
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