2007 Yamaha Outboard Z300 LZ300 Boat Motor Owners Manual

Maintenance
ple, if the  center electrode porcelain  is very    spark plug to the correct torque.
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 re-
move  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 re-
place the spark plug with another of the cor-
rect type.
Spark plug torque:
Nm (18.4 ft-lb) (2.55 kgf-m)
25.0
NOTE:
If a torque-wrench is not available when you
are fitting  a spark  plug, a good  estimate of
the correct torque is 1/4 to 1/2 a turn past fin-
ger-tight. Have the spark plug adjusted to the
correct  torque as  soon  as  possible with  a
torque-wrench.
EMU28962
Checking fuel system
Standard spark plug:
BKR6EKU
EWM00060
WARNING
Gasoline and  its vapors are  highly flam-
mable  and  explosive.  Keep  away  from
Before  fitting the  spark  plug,  measure the
electrode gap  with a  wire thickness gauge;
adjust the gap to specification if necessary.
sparks,
cigarettes,
flames,
or
other
sources of ignition.
EWM00910
WARNING
1
Leaking  fuel can  result in  fire  or explo-
sion.
q
q
Check for fuel leakage regularly.
If  any  fuel  leakage is  found,  the  fuel
system must be repaired by a qualified
mechanic. Improper  repairs  can make
the outboard unsafe to operate.
2
1
ZMU01892
Check the fuel lines for leaks, crack, or mal-
function. If a problem is found, your Yamaha
dealer or other qualified mechanic should re-
pair it immediately.
1.
2.
Spark plug gap
Spark plug I.D. mark (NGK)
Spark plug gap:
1.5
1.6 mm (0.0590.063 in)
When fitting the plug, always  clean the gas-
ket surface and use  a new gasket. Wipe off
any dirt  from the  threads and  screw in  the
63
Product Specification
CategoriesYamaha Outboard Manuals
Document TypeBoat Motor Manual Free Download. Marine Operator's Boating Guide.
Tags,
Model Year2007
Download File
Please Enter the Security Characters Shown Below. Letters are Case Sensitive. Your download link will appear upon completing this step.
- 98 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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