PURSUIT LS 235 Owner's Manual download pdf (Page 19)

LS 235

1.5 Propellers

The propellers convert the engine’s power into thrust. They come in a variety of styles, diameters and pitches.

The one that will best suit the needs of your Pursuit will depend somewhat on your application and expected

average load. Propeller sizes are identified by two numbers stamped on the prop in sequence. The 1st number

in the sequence (example 14 x 21) is the diameter of the propeller, and the 2nd number is the pitch. Pitch

is the theoretical distance traveled by the propeller in each revolution. Always repair or replace a propeller

immediately if it has been damaged. A damaged and therefore out of balance propeller can cause vibration

that can be felt in the boat and could damage the engine gear assembly. Refer to the engine owner’s manual

for information on propeller removal and installation.

1.6 Engine Instrumentation

The helm station is equipped with a set of engine instruments and alarms. These instruments allow the operator

to monitor the engines’ operational conditions. Close observation of these instruments allows the operator

to operate the engines at the most efficient level and could save them from serious costly damage. The

instrumentation is unique to the type of outboard motors installed on your Pursuit. Some or all of the following

gauges may be present.

This model may be equipped with Yamaha Command Link Integrated Information System®. Please

refer to the Yamaha

manuals for information on the operation of this system.

TACHOMETER

The tachometer displays the speed of the engine in revolutions per minute (RPM). This speed is not the boat

speed or necessarily the speed of the propeller. The tachometer may not register zero with the key in the “OFF”

position.

NEVER EXCEED THE MAXIMUM RECOMMENDED OPERATION RPM OF THE ENGINE.

MAINTAINING MAXIMUM, OR CLOSE TO MAXIMUM, RPM FOR EXTENDED PERIODS

CAN REDUCE THE LIFE OF THE ENGINE.

SPEEDOMETER

The speedometer indicates the speed of the boat in miles per hour. Most speedometers measure the water

pressure against a small hole in a pickup tube located in the engine lower unit or mounted on the bottom of

the transom.

TEMPERATURE WARNING

The temperature warning indicates the temperature of the engine. A sudden increase in the temperature could

indicate an obstructed water inlet or an impeller failure.

CONTINUED OPERATION OF AN OVERHEATED ENGINE CAN RESULT IN ENGINE SEI-

ZURE. IF AN UNUSUALLY HIGH TEMPERATURE READING OCCURS, SHUT THE ENGINE

OFF IMMEDIATELY. THEN INVESTIGATE AND CORRECT THE PROBLEM.

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PURSUIT LS 235 Owner's Manual Page 19