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EdgeWater 175CC / 155CC

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Chapter 3 Propulsion SystemChapter 3 Propulsion System

Chapter 3 Propulsion System

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 Instrumentation3.5 Engine Instrumentation

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 tachometer is 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 175CC / 155CC. 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.

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.

Water Pressure Gauge

This gauge measures pressure in the engine cooling system. If the pressure changes from the norm it

could indicate a complete or partial blockage in the system or a water pump problem. If this does not

return to normal, your dealer should check it to make sure the cooling system is operating properly.

Fuel Gauge

This gauge indicates the amount of fuel in the fuel tank. It is always prudent to follow the rule

of thirds, one-third of the tank to get the destination, one-third to return, and one-third in reserve.

This gauge is a measure of relative fuel supply and is not a calibrated instrument!

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Edgewater Networks 175CC User Manual

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