4-14
E
EJU11061
Cleaning and adjusting the
spark plugs
The spark plug is an important engine
component and is easy to inspect. The con-
dition of the spark plug can indicate some-
thing about the condition of the engine. For
example, if the center electrode porcelain is
very white, this could indicate an intake air
leak or carburetion problem in that cylinder.
Do not attempt to diagnose any problems
yourself. Have a Yamaha dealer service the
watercraft.
Remove and inspect the spark plug peri-
odically; heat and deposits will cause the
spark plug to slowly break down and erode.
If electrode erosion becomes excessive, or if
carbon and other deposits are excessive,
replace the spark plug with the specified
plug.
Measure the spark plug gap
a
with a
wire thickness gauge before installing the
spark plug. Replace the spark plugs or
adjust the gap to specification if necessary.
To install the spark plug:
1. Clean the gasket surface.
2. Wipe any dirt from the threads of the
spark plug.
3. Screw the spark plug to the correct
torque.
Standard spark plug: BR8ES-11
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Spark plug tightening torque:
25 N·m (2.5 kgf·m, 18 ft·lb)
UF0V13.book Page 14 Friday, June 6, 2003 11:32 AM
Summary of Contents for XLT1200 WaveRunner 2004
Page 1: ...2004 WaveRunner XLT1200 OWNER S OPERATOR S MANUAL ...
Page 2: ......
Page 8: ...1 3 E EJU00998 Important labels EJU01351 Label location ...
Page 9: ...1 4 E EJU01352 Warning labels 1 2 3 4 ...
Page 10: ...1 5 E EJU01354 Other labels 7 8 5 6 9 0 ...
Page 11: ...1 6 E A B D E C ...
Page 26: ...E MEMO ...
Page 130: ...E MEMO ...
Page 131: ...E 6 EJU01124 APPENDIX Limited warranty 6 1 YAMAHA EXTENDED SERVICE Y E S 6 3 Index 6 4 ...
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