2005 Yamaha Outboard 90D Boat Motor Owners Manual

Operation
motor greatly affects the water resistance. If
the  mounting height  is  too high,  cavitation
tends to occur, thus reducing the propulsion;
life.
ECM00140
CAUTION:
and if the propeller tips cut the air, the engine    q  Failure to follow the break-in procedure
speed will rise abnormally and cause the en-
gine to overheat. If the mounting height is too
could  result in  reduced engine  life  or
even severe engine damage.
low, the  water resistance  will increase  and       q Premix fuel must be used during break-
thereby reduce engine efficiency. Mount the
outboard  motor  so  that  the  anti-cavitation
plate is  in alignment with  the bottom  of the
boat.
in in  addition to  oil in the  oil injection
system.
EMU27060
Gasoline and engine oil mixing chart
(50:1)
ZMU01762
1.
2.
: Gasoline
: Engine oil
NOTE:
q
The optimum  mounting height of  the out-
board motor is affected  by the boat/motor
combination  and  the  desired   use.  Test
ECM00150
CAUTION:
runs  at different  heights  can help  deter-     Be sure to mix gasoline and oil complete-
mine the  optimum mounting height.  Con-    ly,  otherwise  the   engine  may  be  dam-
sult
your
Yamaha
dealer
or
boat
aged.
manufacturer for further information on de-
termining the proper mounting height.
For instructions on setting the trim angle of   Run  the engine  under load  (in  gear with  a
the outboard motor, see page 30.
EMU30310
Procedure for oil injection models
q
propeller installed) as follows.
1.
2.
First 10 minutes:
EMU27020
Breaking in engine
Run  the engine  at the  lowest  possible
speed. A fast idle in neutral is best.
Next 50 minutes:
Do  not  exceed   half  throttle  (approxi-
mately 3000  r/min). Vary engine  speed
occasionally. If you  have an easy-plan-
ing boat,  accelerate at  full throttle onto
plane,   then   immediately   reduce  the
Your new engine requires a period of break-
in to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help en-
sure proper performance and  longer engine
22
Product Specification
CategoriesYamaha Outboard Manuals
Document TypeBoat Motor Manual Free Download. Marine Operator's Boating Guide.
Tags
Model Year2005
Download File
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- 77 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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