Yamaha F15 Owners Manual
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Operation 45 EMU28071 Cruising in shallow water (manual tilt models) WARNING EWM00710 Place the gear shift in neutral before us- ing the shallow water cruising system. Run the boat at the lowest possible speed when using the shallow water cruising system. The tilt lock mecha- nism does not work while the shallow water cruising system is being used. Hitting an underwater obstacle could cause the outboard motor to lift out of the water, resulting in loss of control. Do not rotate the outboard motor 180° and operate the boat in reverse. Place the gear shift in reverse to operate the boat in reverse. Use extra care when operating in re- verse. Too much reverse thrust can cause the outboard motor to lift out of the water, increasing the chance of ac- cident and personal injury. 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. EMU28123 Procedure 1. Place the gear shift lever in neutral. ZMU02047 ZMU01988 N
Operation 46 2. Place the tilt lock lever in the release/up position. 3. Slightly tilt the outboard motor up. The tilt support bar will lock automatically, supporting the outboard motor in a par- tially raised position. NOTE: This outboard motor has 2 positions for shal- low water cruising. 4. To return the outboard motor to the nor- mal running position, place the gear shift lever in neutral, then place the tilt lock le- ver in the lock/down position.5. Slightly tilt the outboard motor up until the tilt support bar automatically returns to the free position. 6. Slowly lower the outboard motor to the normal position. 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. EMU28184 Procedure for power trim and tilt / power tilt models 1. Place the gear shift lever in neutral. N ZMU04881 ZMU02044 ZMU02048
Operation 47 2. Slightly tilt the outboard motor up to the desired position using the power trim / tilt switch.3. To return the outboard motor to the nor- mal running position, press the power trim / tilt switch and slowly tilt the out- board motor down. EMU28191 Cruising in other conditions Cruising in salt water After operating in salt water, wash out the cooling water passages with fresh water to prevent them from becoming clogged with salt deposits. NOTE: For cooling system flushing instructions, see page 51. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (not available for some models) if you use the outboard motor in turbid (muddy) water conditions. N ZMU03525 ZMU01988 N UP ZMU01935 UPDN ZMU02823 UP UPZMU04900
48 Maintenance EMU28217 Specifications Dimension: Overall length: F15EH 1001 mm (39.4 in) F15MH 1001 mm (39.4 in) F15PH 1001 mm (39.4 in) F15PR 643 mm (25.3 in) F9.9ER2 643 mm (25.3 in) F9.9MH2 1001 mm (39.4 in) FT9.9DWH 1105 mm (43.5 in) T9.9EH2 1001 mm (39.4 in) T9.9ER2 643 mm (25.3 in) Overall width: F15EH 427 mm (16.8 in) F15MH 427 mm (16.8 in) F15PH 427 mm (16.8 in) F15PR 369 mm (14.5 in) F9.9ER2 369 mm (14.5 in) F9.9MH2 427 mm (16.8 in) FT9.9DWH 501 mm (19.7 in) T9.9EH2 427 mm (16.8 in) T9.9ER2 369 mm (14.5 in) Overall height S: F15EH 1080 mm (42.5 in) F15MH 1080 mm (42.5 in) F9.9MH2 1080 mm (42.5 in) Overall height L: F15EH 1207 mm (47.5 in) F15MH 1207 mm (47.5 in) F15PH 1207 mm (47.5 in) F15PR 1207 mm (47.5 in) F9.9ER2 1207 mm (47.5 in) F9.9MH2 1207 mm (47.5 in) T9.9EH2 1253 mm (49.3 in) T9.9ER2 1253 mm (49.3 in) Overall height X: FT9.9DWH 1321 mm (52.0 in) Transom height S: F15EH 440 mm (17.3 in) F15MH 440 mm (17.3 in)F9.9MH2 440 mm (17.3 in) Transom height L: F15EH 567 mm (22.3 in) F15MH 567 mm (22.3 in) F15PH 567 mm (22.3 in) F15PR 567 mm (22.3 in) F9.9ER2 567 mm (22.3 in) F9.9MH2 567 mm (22.3 in) T9.9EH2 567 mm (22.3 in) T9.9ER2 567 mm (22.3 in) Transom height X: FT9.9DWH 635 mm (25.0 in) Weight (AL) S: F15EH 48.0 kg (106 lb) F15MH 45.0 kg (99 lb) F9.9MH2 45.0 kg (99 lb) Weight (AL) L: F15EH 50.0 kg (110 lb) F15MH 47.0 kg (104 lb) F15PH 55.0 kg (121 lb) F15PR 54.0 kg (119 lb) F9.9ER2 49.0 kg (108 lb) F9.9MH2 47.0 kg (104 lb) T9.9EH2 51.0 kg (112 lb) T9.9ER2 50.0 kg (110 lb) Weight (AL) X: FT9.9DWH 52.5 kg (116 lb) Performance: Full throttle operating range: 4500–5500 r/min Maximum output: F15EH 11.0 kW@5000 r/min (15 HP@5000 r/min) F15MH 11.0 kW@5000 r/min (15 HP@5000 r/min) F15PH 11.0 kW@5000 r/min (15 HP@5000 r/min) F15PR 11.0 kW@5000 r/min (15 HP@5000 r/min) F9.9ER2 7.3 kW@5000 r/min (10 HP@5000 r/min)
Maintenance 49 F9.9MH2 7.3 kW@5000 r/min (10 HP@5000 r/min) FT9.9DWH 7.3 kW@5000 r/min (10 HP@5000 r/min) T9.9EH2 7.3 kW@5000 r/min (10 HP@5000 r/min) T9.9ER2 7.3 kW@5000 r/min (10 HP@5000 r/min) Idling speed (in neutral): F15EH 950 ± 50 r/min F15MH 950 ± 50 r/min F15PH 950 ± 50 r/min F15PR 950 ± 50 r/min F9.9ER2 950 ± 50 r/min F9.9MH2 950 ± 50 r/min FT9.9DWH 1050 ± 50 r/min T9.9EH2 1050 ± 50 r/min T9.9ER2 1050 ± 50 r/min Engine: Type: 4-stroke L Displacement: 323.0 cm 3 (19.71 cu.in) Bore × stroke: 59.0 × 59.0 mm (2.32 × 2.32 in) Ignition system: CDI Spark plug with resistor (NGK): DPR6EA-9 Spark plug gap: 0.8–0.9 mm (0.031–0.035 in) Control system: F15EH Tiller F15MH Tiller F15PH Tiller F15PR Remote control F9.9ER2 Remote control F9.9MH2 Tiller FT9.9DWH Tiller T9.9EH2 Tiller T9.9ER2 Remote controlStarting system: F15EH Electric F15MH Manual F15PH Electric F15PR Electric F9.9ER2 Electric F9.9MH2 Manual FT9.9DWH Manual and electric T9.9EH2 Electric T9.9ER2 Electric Starting carburetion system: Choke valve Valve clearance (cold engine) IN: 0.15–0.25 mm (0.0059–0.0098 in) Valve clearance (cold engine) EX: 0.20–0.30 mm (0.0079–0.0118 in) Min. cold cranking amps (CCA/SAE): F15EH 245.0 A F15PH 245.0 A F15PR 245.0 A F9.9ER2 245.0 A T9.9EH2 245.0 A T9.9ER2 245.0 A Min. marine cranking amps (MCA/ABYC): F15EH 323.0 A F15PH 323.0 A F15PR 323.0 A F9.9ER2 323.0 A T9.9EH2 323.0 A T9.9ER2 323.0 A Min. reserve capacity (RC/SAE): F15EH 52 minutes F15PH 52 minutes F15PR 52 minutes F9.9ER2 52 minutes T9.9EH2 52 minutes T9.9ER2 52 minutes Alternator output: F15MH 80 W F9.9MH2 80 W Alternator output for battery DC:
Maintenance 50 F15EH 10.0 A F15PH 10.0 A F15PR 10.0 A F9.9ER2 10.0 A FT9.9DWH 10.0 A T9.9EH2 10.0 A T9.9ER2 10.0 A Drive unit: Gear positions: Forward-neutral-reverse Gear ratio: F15EH 2.08 (27/13) F15MH 2.08 (27/13) F15PH 2.08 (27/13) F15PR 2.08 (27/13) F9.9ER2 2.08 (27/13) F9.9MH2 2.08 (27/13) FT9.9DWH 2.92 (38/13) T9.9EH2 2.92 (38/13) T9.9ER2 2.92 (38/13) Trim and tilt system: F15EH Manual tilt F15MH Manual tilt F15PH Power tilt F15PR Power tilt F9.9ER2 Manual tilt F9.9MH2 Manual tilt FT9.9DWH Manual tilt T9.9EH2 Manual tilt T9.9ER2 Manual tilt Propeller mark: F15EH J F15MH J F15PH J F15PR J F9.9ER2 J F9.9MH2 J FT9.9DWH R T9.9EH2 R T9.9ER2 R Fuel and oil: Recommended fuel: Regular unleaded gasoline Min. pump octane: F15EH 86 F15MH 86 F15PH 86 F15PR 86 F9.9ER2 86 F9.9MH2 86 T9.9EH2 86 T9.9ER2 86 Fuel tank capacity: 25 L (6.60 US gal) (5.50 Imp.gal) Recommended engine oil: 4-stroke outboard motor oil Engine oil grade API: API SE, SF, SG, SH, SJ, SL Engine oil type SAE: SAE10W30 or SAE10W40 Lubrication: Wet sump Engine oil quantity (excluding oil filter): 1.0 L (1.06 US qt) (0.88 Imp.qt) Recommended gear oil: Hypoid gear oil SAE#90 Gear oil quantity: F15EH 250.0 cm 3 (8.45 US oz) (8.82 Imp.oz) F15MH 250.0 cm 3 (8.45 US oz) (8.82 Imp.oz) F15PH 250.0 cm 3 (8.45 US oz) (8.82 Imp.oz) F15PR 250.0 cm 3 (8.45 US oz) (8.82 Imp.oz) F9.9ER2 250.0 cm 3 (8.45 US oz) (8.82 Imp.oz) F9.9MH2 250.0 cm 3 (8.45 US oz) (8.82 Imp.oz) FT9.9DWH 370.0 cm 3 (12.51 US oz) (13.05 Imp.oz) T9.9EH2 370.0 cm 3 (12.51 US oz)
Maintenance 51 (13.05 Imp.oz) T9.9ER2 370.0 cm 3 (12.51 US oz) (13.05 Imp.oz) Tightening torque for engine: Spark plug: 18.0 Nm (13.3 ft-lb) (1.84 kgf-m) Propeller nut: F15EH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m) F15MH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m) F15PH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m) F15PR 17.0 Nm (12.5 ft-lb) (1.73 kgf-m) F9.9ER2 17.0 Nm (12.5 ft-lb) (1.73 kgf-m) F9.9MH2 17.0 Nm (12.5 ft-lb) (1.73 kgf-m) FT9.9DWH 21.0 Nm (15.5 ft-lb) (2.14 kgf-m) T9.9EH2 21.0 Nm (15.5 ft-lb) (2.14 kgf-m) T9.9ER2 21.0 Nm (15.5 ft-lb) (2.14 kgf-m) Engine oil drain bolt: 28.0 Nm (20.7 ft-lb) (2.86 kgf-m) Engine oil filter: 18.0 Nm (13.3 ft-lb) (1.84 kgf-m) EMU28222 Transporting and storing outboard motor WARNING EWM00690 Leaking fuel is a fire hazard. When transporting and storing the outboard motor, close the air vent screw and fuel cock to prevent fuel from leaking. USE CARE when transporting fuel tank, whether in a boat or car. DO NOT fill fuel container to maximumcapacity. Gasoline will expand consid- erably as it warms up and can build up pressure in the fuel container. This can cause fuel leakage and a potential fire hazard. WARNING EWM00700 Never get under the lower unit while it is tilted, even if a motor support bar is used. Severe injury could occur if the outboard motor accidentally falls. CAUTION: ECM00660 Do not use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt sup- port and fall. If the motor cannot be trail- ered in the normal running position, use an additional support device to secure it in the tilt position. The outboard motor should be trailered and stored in the normal running position. If there is insufficient road clearance in this position, then trailer the outboard motor in the tilt po- sition using a motor support device such as a transom saver bar. Consult your Yamaha dealer for further details. EMU28235 Clamp screw mounting models When transporting or storing the outboard motor while removed from a boat, keep the outboard motor in the attitude shown.
Maintenance 52 NOTE: Place a towel or something similar under the outboard motor to protect it from damage. EMU28241 Storing outboard motor When storing your Yamaha outboard motor for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage. It is advisable to have your outboard motor serviced by an authorized Yamaha dealer prior to storage. However, you, the owner, with a minimum of tools, can perform the fol- lowing procedures. CAUTION: ECM01080 To prevent problems which can be caused by oil entering the cylinder from the sump, keep the outboard motor in the attitude shown when transportingand storing it. If storing or transporting the outboard motor on its side (not up- right), put it on a cushion after draining the engine oil. Do not place the outboard motor on its side before the cooling water has drained from it completely, otherwise water may enter the cylinder through the exhaust port and cause engine trou- ble. Store the outboard motor in a dry, well- ventilated place, not in direct sunlight. EMU28301 Procedure EMU28372 Flushing in a test tank 1. Wash the outboard motor body using fresh water. For further information, see page 55. 2. Fill the fuel tank with fresh fuel and add one ounce of “Yamaha Fuel Conditioner and Stabilizer” (Part No. LUB-FUELC- 12-00) to each gallon of fuel. NOTE: The use of “Yamaha Fuel Conditioner and Stabilizer” eliminates the need to drain the fuel system. Consult your Yamaha dealer or other qualified mechanic if the fuel system is to be drained instead. 3. Remove the engine top cowling and si- lencer cover. 4. Install the outboard motor on the test tank. ZMU02049 ZMU02050
Maintenance 53 5. Fill the tank with fresh water to above the level of the anti-cavitation plate. CAUTION: ECM00300 Do not run the engine without supplying it with cooling water. Either the engine water pump will be damaged or the en- gine will be damaged from overheating. Before starting the engine, be sure to supply water to the cooling water passag- es. CAUTION: ECM00290 If the fresh water level is below the level of the anti-cavitation plate, or if the water supply is insufficient, engine seizure may occur. 6. Cooling system flushing is essential to prevent the cooling system from clog- ging up with salt, sand, or dirt. In addi- tion, fogging of the engine is mandatory to prevent excessive engine damage due to rust. Perform the flushing and fogging at the same time. WARNING EWM00090 Do not touch or remove electrical partswhen starting or during operation. Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running. 7. Run the engine at a fast idle for 10–15 minutes in neutral position. 8. Just prior to turning off the engine, quick- ly spray “Yamaha Stor-Rite Engine Fog- ging Oil” (Part No. LUB-STRRT-12-00) alternately into each carburetor or the fogging hole of the silencer cover, if equipped. When properly done, the en- gine will smoke excessively and almost stall. 9. Remove the outboard motor from the test tank. 10. Drain the cooling water completely out of the motor. Clean the body thoroughly. 11. Install the silencer cover/cap and top cowling. EMU28400 Lubrication (except oil injection models) 1. Grease the spark plug threads and in- stall the spark plug(s) and torque to proper specification. For information on spark plug installation, see page 61. 2. Change the gear oil. For instructions, see page 69. Inspect the oil for the pres- ence of water that indicates a leaky seal. Seal replacement should be performed by an authorized Yamaha dealer prior to use. 3. Grease all grease fittings. For further de- tails, see page 59. EMU28421 Cleaning and anticorrosion measures 1. Wash down the exterior of the outboard motor with fresh water and dry off com- pletely. 1. Water surface 2. Lowest water level ZMU02051 1 2
Maintenance 54 2. Spray the outboard motor exterior with “Yamaha Silicone Protectant” (Part No. LUB-SILCNE-13-00). 3. Wax the cowling with a non-abrasive wax such as “Yamaha Silicone Wax” (Part No. ACC-11000-15-02). EMU28430 Battery care WARNING EWM00330 Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poisonous and highly caustic. Always follow these preventive mea- sures: Avoid bodily contact with electrolytic fluid as it can cause severe burns or permanent eye injury. Wear protective eye gear when han- dling or working near batteries. Antidote (EXTERNAL): SKIN - Flush with water. EYES - Flush with water for 15 minutes and get immediate medical attention. Antidote (INTERNAL): Drink large quantities of water or milk followed by milk of magnesia, beaten egg, or vegetable oil. Get immediate medical attention. Batteries also generate explosive hydro- gen gas; therefore, you should always follow these preventive measures: Charge batteries in a well-ventilated ar- ea. Keep batteries away from fire, sparks, or open flames (for example: welding equipment, lighted cigarettes, and so on.) DO NOT SMOKE when charging or han- dling batteries. KEEP BATTERIES AND ELECTROLYTIC FLUID OUT OF REACH OF CHILDREN. Batteries vary among manufacturers. There- fore the following procedures may not al- ways apply. Consult your battery manufacturer’s instructions. Procedure 1. Disconnect and remove the battery from the boat. Always disconnect the black negative cable first to prevent the risk of shorting. 2. Clean the battery casing and terminals. Fill each cell to the upper level with dis- tilled water. 3. Store the battery on a level surface in a cool, dry, well-ventilated place out of di- rect sunlight. 4. Once a month, check the specific gravity of the electrolyte and recharge as re- quired to prolong battery life. EMU28441 Flushing power unit Perform this procedure right after operation for the most thorough flushing. CAUTION: ECM01530 Do not perform this procedure while the engine is running. The water pump may be damaged and severe damage from overheating can result. 1. After shutting off the engine, unscrew the garden hose connector from the fit- ting on the bottom cowling.