2005 Yamaha Outboard F250D LF250D Boat Owners Manual

Operation
EMU27911
Adjusting boat trim
Bow Down
Too much  trim-in causes  the boat  to plow
through the water,  decreasing fuel economy
and making it hard to increase speed. Operat-
ing  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 opera-
tion difficult and dangerous.
When the boat is on plane, a bow-up attitude
results in less drag,  greater stability and effi-
ciency. 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 tenden-
cy to steer to one side or the other. Compen-
sate for  this as  you steer.  The trim tab  can
also  be  adjusted  to help  offset  this  effect.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto plane.
NOTE:
Depending on the type of  boat, the outboard
Bow Up
motor trim angle may have little effect on the
Too much  trim-out puts the  bow of the  boat    trim of the boat when operating.
too high in the water. Performance and econ-
EMU27940
omy 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  perfor-
mance further,  and the boat  may porpoise
(hop in the water), which could throw the op-
erator and passengers overboard.
Tilting up and down
If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard
motor should be tilted up to protect the propel-
ler and casing from damage by  collision with
obstructions, and  also  to reduce  salt corro-
sion.
EWM01130
WARNING
q
Be sure  all people are  clear of the  out-
board motor when  tilting up and down,
also be  careful  not to  pinch any  body
parts between the drive unit and engine
bracket.
q
Leaking fuel is  a fire hazard.  If the out-
board motor will be tilted  for more than
a few minutes, close the fuel cock or dis-
36
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.
- 82 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
(0 votes, average: 0 out of 5)

Submit your review (optional)
(will not be displayed)
* Required Field

Leave a Reply

Your email address will not be published. Required fields are marked *

*
*
Website