2004 Yamaha Outboard 40C 50C Boat Owners Manual

63B-9-1B-4
2/27/03 3:38 PM   Page 14
E
When  fitting  the plug,  always  clean  the
gasket  surface   and  use  a   new  gasket.
Wipe  off  any dirt  from  the  threads  and
screw  in  the  spark   plug  to  the  correct
torque.
Spark plug torque:
Refer to “SPECIFICATIONS”, page 4-1.
NOTE:
If a  torque-wrench is  not  available when
you are  fitting a  spark plug,  a good  esti-
mate of  the correct  torque is 1/4  to 1/2  a
turn past finger-tight. Have the spark plug
adjusted to the  correct torque as  soon as
possible with a torque-wrench.
Initial of spark plug
Plug wrench size
I.D. mark
B
21 mm (13/16 in.)
16 mm (5/8 in.)
C/BK
D
18.3 mm (23/32 in.)
1
2
Spark plug gap
Spark plug I.D. mark (NGK)
w
q
903022
EMU16350
CHECKING TOP COWLING
Check  the  fitting  of  the  top  cowling  by
pushing it with both hands.
If the fitting  is loose have it repaired  by a
Yamaha dealer.
4-13
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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- 114 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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