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4-15
E
EJU01341
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. Adjust the gap to specification if
necessary.
To reinstall 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
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Spark plug torque:
25 N·m (2.5 kgf·m, 18 ft·lb)
UF1F10.book Page 15 Monday, September 3, 2001 9:26 AM
Summary of Contents for XLT800 WaveRunner 2002
Page 1: ...ION OWNER S OPERATOR S MANUAL LIT 18626 04 44 XLT800 U S A Edition 2002 WaveRunner ...
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Page 10: ...1 3 E EJU00998 Important labels EJU01351 Label location ...
Page 11: ...1 4 E EJU01352 Warning labels 1 2 3 5 4 ...
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Page 13: ...1 6 E EJU01353 Caution labels 0 A B C ...
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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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