2004 Yamaha Outboard VX150C Motor Owners Manual

67M-9-15-4
2/28/03 9:20  Page 12
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EMU01202
CLEANING AND ADJUSTING SPARK
PLUG
w
When removing or installing a spark plug,
be careful not to damage  the insulator. A
damaged insulator  could  allow external
sparks, which  could lead to  explosion or
fire.
The  spark  plug is  an  important  engine
component  and  is easy  to  inspect.  The
condition of  the spark  plug  can indicate
something   about  the  condition   of  the
engine.  For example,  if  the center  elec-
trode 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.
Instead,   take  the outboard   motor  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  electrode   erosion    becomes
excessive, or if carbon and other  deposits
are  excessive,   you  should  replace  the
spark  plug  with  another  of  the  correct
type.
Standard spark plug:
Refer to “SPECIFICATIONS”, page 4-1.
Before fitting the spark plug,  measure the
electrode    gap  with   a  wire  thickness
gauge; adjust  the  gap to  specification if
necessary.
4-11
Product Specification
CategoriesYamaha Outboard Manuals
Document TypeBoat Motor Manual Free Download. Marine Operator's Boating Guide.
Tags
Model Year2004
Download File
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- 120 pages
LanguageEnglish
Product BrandYamaha Motor. Yamaha Motor Corporation, USA - Support Customer Relations for US: 1-800-962-7926
Yamaha Boats: 1-800-962-7926
Yamaha Outboard Customer Relations: 1-866-894-1626 , Yamaha Outboard
Document File TypePDF
Publisheryamaha-motor.com
Wikipedia's PageYamaha Motor Company
CopyrightAttribution Non-commercial
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