2004 Yamaha Outboard F115C LF115C Boat Motor Owners Manual

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2/20/03 13:32  Page 17
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EMU19160
Trim angle settings and boat handling
When the boat is on  plane, a bow-up atti-
tude results  in less drag,  greater stability
and efficiency. This  is generally when the
keel  line of  the  boat is  up about  3  to 5
degrees. With  the bow  up, the boat  may
have a  greater tendency  to  steer to  one
side or  the other. Compensate for  this as
you steer. The trim tab can also be adjust-
ed to help offset this effect.
q
001672
001673
001674
w
1 Optimum angle (level keel line)
2
3
Bow up
Bow down
Bow Up
Too much  trim-out  puts the  bow  of the
boat too  high in  the water.  Performance
and economy  are decreased because  the
hull of  the boat is pushing  the water and
there is more  air drag. Excessive trim-out
can also  cause the  propeller to ventilate,
which reduces  performance further,  and
the  boat  may  porpoise  ”  (hop  in  the
water),  which could  throw  the operator
and passengers overboard.
e
Bow Down
When the  bow of  the boat  is down, it  is
easier to  accelerate from a  standing start
onto plane.  Too much  trim-in causes the
boat   to   plow ”  through    the   water,
decreasing  fuel economy  and making  it
hard  to increase  speed.  Operating  with
excessive  trim-in  at higher  speeds  also
makes  the boat  unstable.  Resistance  at
the bow is  greatly increased, heightening
the danger of bow steeringand making
operation difficult and dangerous.
3-16
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.
- 116 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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