User manual YAMAHA F250HP

[. . . ] F250 LF250 OWNER'S MANUAL U. S. A. Edition LIT-18626-07-16 6P2-28199-13 ZMU01690 Read this owner's manual carefully before operating your outboard motor. Important manual information EMU31280 To the owner Thank you for choosing a Yamaha outboard motor. This Owner's Manual contains information needed for proper operation, maintenance and care. A thorough understanding of these simple instructions will help you obtain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. [. . . ] G The low oil pressure warning indicator will light or blink. If the warning system has activated, stop the engine as soon as it is safe to do so. Check the oil level and add oil as needed. If the oil level is correct and the warning device does not switch off, consult your Yamaha dealer. ECM00100 CAUTION: Do not continue to run the engine if the low oil pressure warning indicator is on. Serious engine damage could occur. ZMU01828 33 Operation EMU26901 EWM01520 Installation ECM00110 WARNING Improper mounting of the outboard motor could result in hazardous conditions such as poor handling, loss of control, or fire hazards. Observe the following: G For permanently mounted models, your dealer or other person experienced in proper rigging should mount the motor. If you are mounting the motor yourself, you should be trained by an experienced person. Mount the outboard motor on the center line (keel line) of the boat, and ensure that the boat itself is well balanced. Otherwise the boat will be hard to steer. For boats without a keel or which are asymmetrical, consult your dealer. CAUTION: 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 that the static water level on the exhaust housing is low enough to prevent water entry into the powerhead, when water rises due to waves when the outboard is not running. EMU31790 Mounting the outboard motor EWM00820 WARNING G G Overpowering a boat could cause severe instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat. If the boat does not have a capacity plate, consult the boat manufacturer. The information presented in this section is intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combination. 1 1. Center line (keel line) ZMU01760 1. Center line (keel line) 34 Operation EMU26930 EMU30173 Mounting height (boat bottom) To run your boat at optimum efficiency, the water resistance (drag) of the boat and outboard motor must be made as little as possible. The mounting height of the outboard 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 engine 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 in alignment with the bottom of the boat. Breaking in engine Your new engine requires a period of break-in to allow mating surfaces of moving parts to wear in evenly. [. . . ] G This procedure will allow some fuel to spill. Wipe up any spilled fuel immediately. 73 Trouble Recovery NOTE: Be careful not to twist the water detection switch lead when unscrewing the filter cup. 1. Water detection switch lead 6. Drain the water in the filter cup by soaking it up with a rag. NOTE: 1. Firmly screw the filter cup onto the filter housing. 4. Disconnect the water detection switch coupler. ECM01570 CAUTION: Be careful not to get any water on the water detection switch coupler, otherwise a malfunction could occur. NOTE: Be careful not to twist the water detection switch lead when screwing the filter cup onto the filter housing. [. . . ]