Yamaha F 15 Owners Manual
Here you can view all the pages of manual Yamaha F 15 Owners Manual. The Yamaha manuals for Outboards are available online for free. You can easily download all the documents as PDF.
Page 31
25 Operation EMU26901 Installation CAUTION: ECM00110 Incorrect engine height or obstructions to smooth water flow (such as the design or condition of the boat, or accessories such as transom ladders or depth finder transducers) can create airborne water spray while the boat is cruising. Severe engine damage may result if the motor is operated continuously in the presence of airborne water spray. NOTE: During water testing check the buoyancy of the boat, at rest, with its maximum load. Check...
Page 32
Operation 26 motor greatly affects the water resistance. If the mounting height is too high, cavitation tends to occur, thus reducing the propulsion; and if the propeller tips cut the air, the engine speed will rise abnormally and cause the en- gine to overheat. If the mounting height is too low, the water resistance will increase and thereby reduce engine efficiency. Mount the outboard motor so that the anti-cavitation plate is between the bottom of the boat and a level 25 mm (1 in.) below it....
Page 33
Operation 27 board (if packed). For details, consult your Yamaha dealer. WARNING EWM00650 Avoid using bolts, nuts or washers other than those contained in the engine pack- aging. If used, they must be of at least the same quality of material and strength and must be tightened securely. After tighten- ing, test run the engine and check their tightness. EMU30172 Breaking in engine Your new engine requires a period of break- in to allow mating surfaces of moving parts to wear in evenly. Correct...
Page 34
Operation 28 er operation before starting the engine. The controls should work smoothly, with- out binding or unusual free play. Look for loose or damaged connections. Check operation of the starter and stop switches when the outboard motor is in the water. EMU27140 Engine Check the engine and engine mounting. Look for loose or damaged fasteners. Check the propeller for damage. EMU27163 Checking the engine oil level 1. Put the outboard motor in an upright po- sition (not...
Page 35
Operation 29 EMU27450 Operating engine EMU27461 Feeding fuel (portable tank) WARNING EWM00420 Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you. When the air vent screw is loosened, gasoline vapor will be released. Gaso- line is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosen-...
Page 36
Operation 30 EMU27490 Starting engine EMU27505 Manual start models (tiller control) 1. Place the gear shift lever in neutral. NOTE: The start-in-gear protection device prevents the engine from starting except when in neu- tral. 2. Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the en- gine stop switch. WARNING EWM00120 Attach the engine stop switch lanyard to a secure place on...
Page 37
Operation 31 NOTE: It is not necessary to use the choke when starting a warm engine. If the choke knob is left in the “” (start) position while the engine is running, the engine will run poorly or stall. 5. Pull the manual starter handle slowly un- til you feel resistance. Then give a strong pull straight out to crank and start the engine. Repeat if necessary. 6. After the engine starts, slowly return the manual starter handle to its original po- sition before releasing it. 7. Slowly return...
Page 38
Operation 32 NOTE: The start-in-gear protection device prevents the engine from starting except when in neu- tral. 2. Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the en- gine stop switch. WARNING EWM00120 Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating. Do not attach the lanyard to clothing that could tear loose....
Page 39
Operation 33 If the choke knob is left in the “” (start) position while the engine is running, the engine will run poorly or stall. 5. Push the starter button to start the mo- tor. (Repeat if necessary.) 6. Immediately after the engine starts, re- lease the starter button to allow it to re- turn to its original position. 7. Slowly return the throttle grip to the fully closed position so that the engine does not stall. CAUTION: ECM00160 Never push the starter button while the engine is...
Page 40
Operation 34 gine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward. 3. Turn the main switch to “” (on). 4. Open the throttle slightly without shifting using the neutral throttle lever or free ac- celerator. You may need to change the throttle opening slightly depending on engine temperature. After the engine starts, return the throttle to the original position. NOTE: On...