2004 Yamaha Outboard F9.9C T9.9C Boat Motor Owners Manual

6G8-9-1M-3 4/4/03 11:35 AM Page 4
E
Mount the outboard motor on the center line
(keel line)  of the  boat, and  ensure that  the
boat itself  is  well balanced.  Otherwise, the
boat will be  hard to steer. For boats  without
a  keel or  which  are  asymmetrical, consult
your dealer.
1
Center line (keel line)
q
104011
EMU12980
Mounting Height
To run  your boat  at optimum efficiency,  the
water-resistance (drag) of the  boat and out-
board motor must  be made as little  as pos-
sible. The  mounting-height of  the  outboard
motor greatly affects the water-resistance. If
the  mounting-height is  too  high,  cavitation
tends  to  occur,  thus  reducing  the  propul-
sion; and if the  propeller tips cut the air,  the
engine   speed   will   rise   abnormally   and
cause the engine  to overheat. If the  mount-
ing-height  is  too low,  the  water-resistance
will  increase   and  thereby  reduce   engine
efficiency. Mount the engine so that the anti-
cavitation plate is between the bottom of the
boat and a level 25 mm (1 in.) below it.
NOTE:
8 The optimum  mounting height of  the out-
board motor is affected  by the boat/motor
combination  and  the   desired  use.  Test
runs  at different  heights  can  help deter-
mine the optimum mounting height.
0
(0
25mm
1in.)
0
01337
8
Refer  to  the  section  “TRIMMING  OUT-
BOARD MOTOR”  for instructions  on set-
ting the trim angle of the outboard.
3-3
Product Specification
CategoriesYamaha Outboard Manuals
Document TypeBoat Motor Manual Free Download. Marine Operator's Boating Guide.
Tags,
Model Year2004
Download File
Please Enter the Security Characters Shown Below. Letters are Case Sensitive. Your download link will appear upon completing this step.
- 117 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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