Edgewater Networks 158CS, Owner Assistance Manual

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10
away from the transom is referred to trimming “out”. It is generally best to have the engine
trimmed in for acceleration from displacement to planning mode. This brings the bow down and
requires less fuel and effort on the engine’s part to plane off the hull.
The first 20
o
of movement aft of the transom is referred to as trim and is the area generally used to
operate the boat while on plane. The area beyond the first 20
o
is referred to as tilt and is usually
reserved for operating in shallow water or pulling up on a beach.
While running under normal conditions, the bow should be in a 3
o
to 5
o
up angle to maximize the
hull’s ride and performance. When sea conditions are rougher than normal, bringing the bow
slightly down may improve the ride and will also allow the boat to remain on plane at a lower
speed.
Watch the hoses and cable on your engine as it is tilted to its full tilt position. They may
become caught and damaged if the engine is in the wrong position.
3.5 Engine Instrumentation
The following is presented to familiarize you with the instruments, which may be on your boat.
Every boat is not equipped with full instrumentation.
All factory installed Yamaha engines include Yamaha’s digital multifunction tachometer
and speedometer. Refer to your engine operators manual for use details.
Tachometer
The tachometer displays the number of revolutions per minute (RPM) the engine is turning. There
is a designed operation RPM range for the engine. Become familiar with the operating range of
your engine and its operating characteristics. The tachometers designed to aid the boater to
assure the engine performs within that designed range. The tachometer can be used to better
understand the performance of your engine and your EdgeWater 158 CS. By monitoring your
tachometer as you operate your EdgeWater, you will find RPM ranges that work better in certain
sea and load conditions. Be alert the tachometer operation may provide an early indication of
difficulty, before it becomes irreversible.
Speedometer
The speedometer indicates the boat speed in miles per hour. Some types work using a spinning
wheel to determine the boat speed. Their accuracy can vary from the actual over the bottom
speed due to many factors. Other boat speedometers calculate the speed by amount of pressure
the moving water forces into a “pitot” tube. These gauges should only be used as indicators of
approximate speed and not used as absolute speed indicators. NOTE: All Yamaha
speedometers utilize a pitot tube. In the event that erroneous speed readings appear, it is likely
caused by debris clogging the pitot tube. Consult with your dealer on methods to clean the tube
and restore normal operation.
Temperature Gauge
This is designed to monitor the operating temperature of your engine’s cooling system. A sudden
rise from the normal should be investigated to determine if there is an obstruction in the cooling
system.