2005 Yamaha Outboard F9.9D T9.9D Boat Owners Manual

Operation
motor greatly affects the water resistance. If
the  mounting height  is  too high,  cavitation
tends to occur, thus reducing the propulsion;
and if the propeller tips cut the air, the engine
speed will rise abnormally and cause the en-
gine to overheat. If the mounting height is too
low, the  water resistance  will increase  and
thereby reduce engine efficiency. Mount the
outboard  motor  so  that  the  anti-cavitation
plate is between the  bottom of the boat and
a level 25 mm (1 in.) below it.
pitch  considerably,  mount   the  outboard
motor low enough so that the propeller will
not contact  the water  surface during mo-
tor-powered operation.
When sailing,  the outboard  motor should
be able to be  tilted up out of the  water so
the  propeller does  not contact  the  water
spray. Disconnect the fuel line.
Check that the outboard motor does not in-
terfere with the rudder.
Check that the engine can be easily  start-
ed and stopped.
q
q
q
q
q
Check the ease of operating the gear shift
and throttle control.
If mounting the outboard  motor on a well-
type boat, exhaust gases and blow-by gas
flow must  be  allowed to  exit the  boat. A
special kit  designed for  this purpose  can
be ordered through your Yamaha dealer.
0–25mm
(0–1in.)
ZMU02011
NOTE:
q
The optimum  mounting height of  the out-
board  motor is  affected by  the  boat and
motor  combination and  the  desired  use.
Test runs at different heights can help de-
termine   the  optimum   mounting  height.
Consult your Yamaha dealer or boat man-
ufacturer for  further information on  deter-
mining the proper mounting height.
ZMU04376
EMU26970
Clamping the outboard motor
q
For instructions on setting the trim angle of
the outboard motor, see page 34.
1.
Place  the outboard  motor on  the  tran-
som so  that it is  positioned as close  to
the center as possible. Tighten the tran-
som clamp screws evenly and securely.
Occasionally  check  the  clamp  screws
for tightness during operation of the out-
board  motor  because  they   could  be-
EMU26960
Mounting height for sailboat
When mounting  the outboard  motor on  the
motor bracket of a sailboat, check the follow-
ing points:
q
When using the outboard motor,  the cavi-
tation  plate should  be  50  mm  (2 in.)  or
more below  the water  surface to  prevent
propeller damage. Because a sailboat can
22
Product Specification
CategoriesYamaha Outboard Manuals
Document TypeBoat Motor Manual Free Download. Marine Operator's Boating Guide.
Tags,
Model Year2005
Download File
Please Enter the Security Characters Shown Below. Letters are Case Sensitive. Your download link will appear upon completing this step.
- 81 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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