8-59
Inspection
The spark plug is an important engine component
and is easy to inspect. The condition of the spark
plug can indicate the condition of the engine.
The ideal color on the white insulator around the
center electrode is a medium-to-light tan color for a
ATV that is being ridden normally.
Do not attempt to diagnose such problems your-
self.
Instead, take the ATV to a Yamaha dealer. You
should periodically remove and inspect the spark
plug because heat and deposits will cause the
spark plug to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon and
other deposits are excessive, you should replace
the spark plug with the specified plug.
Specified spark plug:
DR8EA (NGK)
U5VH60.book Page 59 Wednesday, August 7, 2002 12:00 PM
Summary of Contents for ULTRAMATIC KODIAK YFM400AP
Page 2: ...B6 fm Page 1 Monday June 18 2001 11 18 AM ...
Page 3: ...U5VH60 book Page 1 Wednesday August 7 2002 12 00 PM ...
Page 4: ...EBU00000 U5VH60 book Page 2 Wednesday August 7 2002 12 00 PM ...
Page 5: ...FBU00000 SBU00000 U5VH60 book Page 3 Wednesday August 7 2002 12 00 PM ...
Page 19: ...U5VH60 book Page 4 Wednesday August 7 2002 12 00 PM ...
Page 23: ...U5VH60 book Page 4 Wednesday August 7 2002 12 00 PM ...
Page 27: ...U5VH60 book Page 4 Wednesday August 7 2002 12 00 PM ...
Page 176: ...7 1 1 Riding Your ATV U5VH60 book Page 1 Wednesday August 7 2002 12 00 PM ...
Page 177: ...7 2 7 Conduite du VTT Conducción del ATV U5VH60 book Page 2 Wednesday August 7 2002 12 00 PM ...
Page 243: ...7 68 U5VH60 book Page 68 Wednesday August 7 2002 12 00 PM ...
Page 269: ...8 14 U5VH60 book Page 14 Wednesday August 7 2002 12 00 PM ...
Page 416: ...B6 fm Page 1 Monday June 18 2001 11 18 AM ...