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Operation62TIP: The engine can also be stopped by pullingthe cord and removing the clip from the en-gine shut-off switch, then turning the mainswitch to “ ” (off).2. If equipped with the Yamaha SecuritySystem: When you leave your boat, setthe Yamaha Security System to the lockmode by pressing the lock button of theremote control transmitter. Short beepwill sound once when locking the securi-ty system. The lock mode is selectedonly when the main switch is in the “ ”(off) position. For further information,see page 23. WARNING! Do not setthe Yamaha Security System in thelock mode when you stop the engineat offshore. [EWM02151]3. Remove the key if the boat will be left un-attended.EMU27865Trimming outboard motorWARNINGEWM00741Excessive trim for the operating condi-tions (either trim up or trim down) cancause boat instability and can makesteering the boat more difficult. This in-creases the possibility of an accident. Ifthe boat begins to feel unstable or is hardto steer, slow down and/or readjust thetrim angle.The trim angle of the outboard motor helpsdetermine the position of the bow of the boatin the water. Correct trim angle will help im-prove performance and fuel economy whilereducing strain on the engine. Correct trimangle depends upon the combination ofboat, engine, and propeller. Correct trim isalso affected by variables such as the load inthe boat, sea conditions, and running speed.EMU27889Adjusting trim angle (Power trim andtilt)WARNINGEWM00754 Be sure all people are clear of the out-board motor when adjusting the trimangle. Body parts can be crushed be-tween the motor and the clamp bracketwhen the motor is trimmed or tilted. Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabil-ity or control problems. Improper trimangle can cause loss of control. If equipped with a power trim and tiltswitch located on the bottom cowling,use the switch only when the boat is atZMU071501. Trim operating angle