2004 Yamaha Outboard 25C Motor Owners Manual

6L2-9-1K-3  2/17/03 18:40  Page 4
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Overpowering  a boat  may  cause severe
instability.  Do   not  install   an  outboard
motor  with  more  horsepower  than  the
maximum rating on  the capacity plate of
the  boat.  If  the  boat  does   not  have  a
capacity plate, consult the boat  manufac-
turer.
EMU01298
Mounting Height
To  run your  boat at  optimum  efficiency,
the  water-resistance  (drag)   of  the  boat
and outboard motor must  be made as lit-
tle  as  possible.  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 propulsion;  and  if  the pro-
peller  tips cut  the  air,  the engine  speed
will rise abnormally and cause the  engine
to overheat. If  the mounting-height is too
low,   the  water-resistance   will   increase
and   thereby   reduce   engine   efficiency.
Mount the  engine so  that the anti-cavita-
tion  plate is  between  the  bottom of  the
boat and a level 25 mm (1 in.) below it.
NOTE:
0~25mm
104013
8 The  optimum  mounting  height  of  the
outboard
boat/motor
motor
combination
is
affected
and
by
the
the
desired
use.   Test   runs   at    different
heights  can  help   determine  the  opti-
mum mounting height.
8
Refer to  the  section “TRIMMING  OUT-
BOARD  MOTOR”   for   instructions  on
setting 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.
- 110 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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