The power trim allows for raising and lowering sterndrive units while underway to provide an ideal boat angle (in relation to water surface) for a given load and water condition.Trimming DOWN moves the sterndrive and propeller closer to the transom. When the sterndrive(s) are trimmed DOWN, the bow of ...
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Written by admin on April 6th, 2011
Written by admin on March 1st, 2011
Press switches in 1/2 second intervals to adjust trim tabs. Pause between
presses to see how boat trim is affected. Caution: Holding switches too
long may cause sudden steering problems. Adjusting one trim tab more
than the other will correct listing caused by improper equipment storage, too
many people on one side or strong ...
Written by admin on March 1st, 2011
Don't reply on your automatic pump switch, with its tiny red panel light, to be
your bilge alarm. Install a real bilge alarm with a loud horn. Mount the float
switch a little higher up than the bilge pump so that it won¡¯t sound as long as
minimal water is entering and the ...
Written by admin on March 1st, 2011
Electrical Power
A bilge pump is only as good as the battery
and wiring that supply power to it.
If batteries are charged daily, either by alternator
or shore power, usually there is no
problem. But don¡¯t expect the batteries
alone to keep the bilge dry for long.
The most common cause of bilge pump
failure is poor ...
Written by admin on March 1st, 2011
Flow Rate
Flow rates, as listed by pump makers, can
be somewhat misleading and serve only as
a relative indicator of pump capacity compared
to others of similar design.
Bilge pump capacity is usually listed at
¡°open flow¡± or ¡°open bucket¡± rate, which
means the figures account for no vertical
lift and no hose friction or discharge outlet
restriction. ...
Written by admin on March 1st, 2011
Marine surveyors and vessel repair professionals
often comment on the inadequacy
of the bilge pumping systems in the vessels
they inspect. A national study of pleasure
boats found that more vessels sink
at the dock than at sea, and a major cause
of both types of sinkings is improper sizing,
installation, and maintenance of
bilge pumps. An owner ...
Written by admin on December 12th, 2010
Two Basic Characteristics of Propellers
Propellers have two basic characteristics: diameter and pitch. Diameter is the distance in inches measured across the propeller hub line from the outer edge of the 360 that is made by the propeller's blades during rotation. Pitch is the distance in inches that a propeller will ...
Written by admin on November 16th, 2010
Hello everyone, I would like to share some of the experience and resource that helped me in my yacht design learning process. After I graduated from university, I worked in a yacht design company. My major was the ship building and design which is quite different with yacht, so I ...
Written by admin on October 22nd, 2010
The Problem with Traditional Outboards The blue smoke and racket emitted from an outboard motor form a nostalgic part of many of our memories of life aboard a boat. Ever since Ole Evinrude created the first practical outboard in 1909 and outboards became popular about 80 years ago, the ...
Written by admin on October 22nd, 2010
Check tires for cold air pressure and general condition, lug nuts for tightness, and wheel bearings or bearing protectors to make sure they're adequately filled with marine grease. (Do not overfill.) Properly fasten the hitch latch (or coupler), and secure it with a safety bolt or lock. Be ...
