Yamaha F115 Owners Manual
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Operation 45 return the main switch to “” (on), wait 10 seconds, then crank the engine again. EMU27670 Warming up engine EMU27710 Manual start and electric start models 1. After starting the engine, allow it to idle for 3 minutes to warm up. Failure to do so will shorten engine life. 2. Be sure the low oil pressure warning in- dicator goes off after starting the engine. 3. Check for a steady flow of water from the cooling water pilot hole. CAUTION: ECM00210 If the low oil pressure warning indicator does not go off after the engine starts, stop the engine. Otherwise serious en- gine damage could occur. Check the oil level and add oil if necessary. Consult your Yamaha dealer if the cause for the low oil pressure warning indicator can- not be found. A continuous flow of water from the pi- lot hole shows that the water pump is pumping water through the cooling passages. If water is not flowing out of the pilot hole at all times while the en- gine is running, overheating and seri- ous damage could occur. Stop the engine and check whether the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the prob- lem cannot be located and corrected. EMU27740 Shifting WARNING EWM00180 Before shifting, make sure there are no swimmers or obstacles in the water near you. CAUTION: ECM00220 To change the boat direction or shifting position from forward to reverse or vice- versa, first close the throttle so that the engine idles (or runs at low speeds). EMU27764 Forward (tiller handle and remote control models) Tiller handle models 1. Place the throttle grip in the fully closed position. 2. Move the gear shift lever quickly and ZMU04229
Operation 46 firmly from neutral to forward. Remote control models 1. Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to forward. EMU27785 Reverse (automatic reverse lock and power trim and tilt models) WARNING EWM00190 When operating in reverse, go slowly. Do not open the throttle more than half. Oth- erwise the boat could become unstable, which could result in loss of control and an accident. Tiller handle models 1. Place the throttle grip in the fully closed position. 2. Move the gear shift lever quickly and firmly from neutral to reverse. Remote control models 1. Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to reverse. N F ZMU04597
Operation 47 EMU27820 Stopping engine Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- ping the engine immediately after operating at high speed is not recommended. EMU27844 Procedure 1. Push and hold the engine stop button or turn the main switch to “” (off). 2. After stopping the engine, disconnect the fuel line if there is a fuel joint on the outboard motor. 3. Tighten the air vent screw on the fuel tank cap (if equipped). 4. Remove the key if the boat will be left unattended. NOTE: The engine can also be stopped by pulling the lanyard and removing the lock plate from the engine stop switch, then turning the main N R ZMU04598 OFFONOFFON ZMU04600
Operation 48 switch to “” (off). EMU27861 Trimming outboard motor The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help im- prove performance and fuel economy while reducing strain on the engine. Correct trim angle depends upon the combination of boat, engine, and propeller. Correct trim is also affected by variables such as the load in the boat, sea conditions, and running speed. WARNING EWM00740 Excessive trim for the operating condi- tions (either trim up or trim down) can cause boat instability and can make steering the boat more difficult. This in- creases the possibility of an accident. If the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle. EMU27882 Adjusting trim angle Power trim and tilt models WARNING EWM00751 Be sure all people are clear of the out- board motor when adjusting the tilt an- gle, also be careful not to pinch any body parts between the drive unit and clamp bracket. Use caution when trying a trim position for the first time. Increase speed gradu- ally and watch for any signs of instabil- ity or control problems. Improper trim angle can cause loss of control. If equipped with a power trim and tilt switch located on the bottom cowling, use the switch only when the boat is at a complete stop with the engine off. Do not adjust the trim angle with this 1. Trim operating angle 1ZMU04258
Operation 49 switch while the boat is moving. Adjust the outboard motor trim angle using the power trim and tilt switch. To raise the bow (trim-out), press the switch “” (up). To lower the bow (trim-in), press the switch “” (down). Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions. EMU27911 Adjusting boat trim When the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency. This is generally when the keel line of the boat is up about 3 to 5 degrees. With the bow up, the boat may have a greater tenden- cy to steer to one side or the other. Compen- sate for this as you steer. The trim tab can also be adjusted to help offset this effect. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. 1. Power trim and tilt switch 1. Power trim and tilt switch 1. Power trim and tilt switch ZMU04601 DN UP1 UP DN 1 ZMU04231 1. Power trim and tilt switch
Operation 50 Bow Up Too much trim-out puts the bow of the boat too high in the water. Performance and econ- omy are decreased because the hull of the boat is pushing the water and there is more air drag. Excessive trim-out can also cause the propeller to ventilate, which reduces per- formance further, and the boat may “por- poise” (hop in the water), which could throw the operator and passengers overboard. Bow Down Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and making it hard to increase speed. Oper- ating with excessive trim-in at higher speeds also makes the boat unstable. Resistance at the bow is greatly increased, heightening the danger of “bow steering” and making opera- tion difficult and dangerous. NOTE: Depending on the type of boat, the outboard motor trim angle may have little effect on the trim of the boat when operating. EMU27933 Tilting up and down If the engine will be stopped for some time or if the boat is moored in shallows, the out- board motor should be tilted up to protect the propeller and casing from damage by colli- sion with obstructions, and also to reduce salt corrosion. WARNING EWM00220 Be sure all people are clear of the out- board motor when tilting up and down, also be careful not to pinch any body parts between the drive unit and engine bracket. WARNING EWM00250 Leaking fuel is a fire hazard. If there is a fuel joint on the outboard motor, discon- nect the fuel line or close the fuel cock if the engine will be tilted for more than a few minutes. Otherwise fuel may leak. CAUTION: ECM00241 Before tilting the outboard motor, stop the engine by following the procedure
Operation 51 on page 47. Never tilt the outboard mo- tor while the engine is running. Severe damage from overheating can result. Do not tilt up the engine by pushing the tiller handle (if equipped) because this could break the handle. EMU28007 Procedure for tilting up (power trim and tilt models / power tilt models) 1. Place the remote control lever / gear shift lever in neutral.2. Disconnect the fuel line from the out- board motor or close the fuel cock. 3. Press the power trim and tilt switch / power tilt switch “” (up) until the out- board motor has tilted up completely. N ZMU03196 N ZMU04588 ZMU04602 UP UP ZMU04232
Operation 52 4. Push the tilt support knob into the clamp bracket or pull the tilt support lever to- ward you to support the engine. WARNING EWM00260 After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit loses pres- sure. 5. Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim and tilt switch / power tilt switch “” (down) to retract the trim rods. CAUTION: ECM00250 Be sure to retract the trim rods complete- ly during mooring. This protects the rodsfrom marine growth and corrosion which could damage the power trim and tilt mechanism. EMU28055 Procedure for tilting down (power trim and tilt models / power tilt models) 1. Push the power trim and tilt switch / pow- er tilt switch “” (up) until the outboard motor is supported by the tilt rod and the tilt support lever / tilt support knob be- comes free. 2. Release the tilt support lever or pull out the tilt support knob. 3. Push the power trim and tilt switch / pow- er tilt switch “” (down) to lower the out- board motor to the desired position. ZMU03449 ZMU03452 ZMU03453
Operation 53 EMU28060 Cruising in shallow water The outboard motor can be tilted up partially to allow operation in shallow water. EMU28090 Power trim and tilt models / power tilt models The outboard motor can be tilted up partially to allow operation in shallow water. WARNING EWM00660 Place the gear shift in neutral before setting up for shallow water cruising. Return the outboard motor to its normal position as soon as the boat is back in deeper water. CAUTION: ECM00260 Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when set- ting up for and cruising in shallow water. Otherwise severe damage from overheat- ing can result. EMU28185 Procedure for power trim and tilt / power tilt models 1. Place the remote control lever / gear shift lever in neutral. DN ZMU01936 UPDN ZMU04603 DN DN ZMU04255 N ZMU03525
Operation 54 2. Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch / power tilt switch. 3. To return the outboard motor to the nor- mal running position, press the power trim and tilt switch / power tilt switch and slowly tilt the outboard motor down. EMU28192 Cruising in other conditions Cruising in salt water After operating in salt water, flush the cooling water passages with fresh water to prevent them from becoming clogged with salt de- posits. N ZMU04588 UP ZMU01935 UPDN ZMU04602 UP UP ZMU04235