2003-2008 Four Winns Sundowner 205 225 245 285 Boat Owners Manual

2.   Use extreme caution while operating the engine in     B.   Pitch
confined areas such as enclosed slips or congested
piers. Operation under such conditions could easily    Pitch is a measure of helix angle, or angle of attack, of
lead to exhaust gasses (carbon monoxide) entering   the rotating blade. Pitch is easily understood if one imag-
eventhoughyoumayhaveallthehatches,windows,          ines the propeller rotating through a semisolid such as
doors and portholes closed.
butter or jello. The distance the propeller will travel in one
revolutioniscalled“Pitch.”   Increasingordecreasingpitch
Persons sleeping can be easily overcome by carbon  will also have a direct bearing on engine rpm’s because
monoxidebecausetheyareunawareofitspresence.         of the greater bite taken by the blade with each rotation.
Sleeping while the engine is running is not recom-     See Figure E1.
mended. Ifpersonsaresleepingaboardwhileunder-
way, those awake should monitor for carbon mon-
ing areas.
NEVER operate the propulsion engine while ev-
eryone on-board is sleeping. Fatal carbon mon-
oxide poisoning can occur.
For additional information, refer to Section B-2 Carbon
E - 3
Consult the  Engine Owners  Manual included  in  the
owner’s packetforadditionaloperationandmaintenance
E - 4
Knowledge of the propeller is most easily gained through
better understanding of the terminology used to refer to
the aspects of propeller size and performance.
Never run with a damaged propeller. You can
damage the engine or drive unit. Keep a spare
propeller on board.
Figure  E1:   Propeller  Pitch  & Diameter
C.   Prop Slip
A.   Diameter
When traveling through water a propeller is unable to get
a complete bite because of the fluidity of water.  “Prop
Slip” is usually expressed as a percent of the computed
theoretical speed. Fifteen to twenty-five percent prop slip
is common for  a sport-type boat operating  at cruising
Diameter is twice the distance from the center of the prop
shafttotheextremetipofapropellerblade.      Increasingor
rpm’s(revolutionsperminute)anenginewilldevelop.     This
is due to the greater amount of propeller blade surface in
contact with the water. See Figure E1.
Changing either diameter or pitch will have an effect on
engine speed and prop slip, and in turn, directly affect the
performanceofaboat.   Thepropeller(s)includedwitheach
Sundowner™  Owner’s  Manual
Section E
Product Specification
CategoriesFour Winns Manuals, Four Winns Sundowner Manuals, Outboard Marine Corporation Manuals
Tags, , ,
Model Year2003, 2004, 2005, 2006, 2007, 2008
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- 206 pages
Document TypeOwner's Manual
Product BrandBoats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx
Document File TypePDF
Wikipedia's PageOutboard Marine Corporation
CopyrightAttribution Non-commercial
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2003-2008 Four Winns Sundowner 205 225 245 285 Boat Owners Manual SKU UPC Model
Evgeny on Jun 25, 2013.

nice boat!

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