User manual YAMAHA 50HP-2002

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[. . . ] 40A 50A OWNER'S MANUAL U. S. A. Edition LIT-18626-04-55 E EMU01449 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. [. . . ] The tilt-lock mechanism does not work while the shallow water cruising system is being used. Hitting an underwater obstacle could cause the engine to lift out of the water, resulting in loss of control. 8 Use extra care when operating in reverse. Too much reverse thrust can cause the engine to lift out of the water, increasing the chance of accident and personal injury. 8 Return the engine to its normal position as soon as the boat is back in deeper water. cC Place the gear-shift in the Neutral position before using the shallow water cruising system. 3-32 E EMG71410 N PROCEDURE 1) Place the gear shift lever in the neutral position. 501024 2) Push the shallow water lever down to the release position. 412012 3) 4) 412022 For setting the outboard motor at the partially tilted position, slightly tilt up the engine until the plate turns completely To return the engine to the normal position, put the engine in Neutral, then slightly tilt up the engine. Set the tilt-lock lever and shallow water lever to the lock position and slowly tilt the engine down. 3-33 E EMG70311 CRUISING IN SHALLOW WATER Hydro tilt model The engine can be tilted up partially to allow operation in shallow water. 000832 w 8 Place the gear shift in the Neutral position before setting for the shallow water cruising. 8 Return the engine to its normal position as soon as the boat is back in deeper water. cC Do not tilt up the outboard motor up to the cooling water inlet of the lower unit is higher than the water surface when setting for and cruising in shallow water. Otherwise severe damage from overheating can result. EMG71710 PROCEDURE 1) 2) 3) Place the gear in the neutral position. Pull the tilt-lock lever up to the Tilt position. Slightly tilt up the engine to the desired position and push the tilt-lock lever down to the Lock position. To return the engine to the normal position, pull the tilt-lock lever up to the Tilt position and slowly tilt the engine down. Push the tilt-lock lever down to the Lock position. 4) 402011 5) 3-34 E EMH60010 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 cloggedup with salt deposits. NOTE: Refer to cooling system flushing instructions in "TRANSPORTING AND STORING OUTBOARD MOTOR". CRUISING IN TURBID WATER It is strongly recommended that the optional chromium-plated water-pump kit be installed if the outboard is to be used in turbid (muddy) water conditions. 3-35 E EMK00010 Chapter 4 MAINTENANCE 1 2 3 4 5 6 SPECIFICATION DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 TRANSPORTING AND STORING OUTBOARD MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Trailering outboard motor. . . . . . . . . . . . . . . . . . . 4-3 Storing outboard motor . . . . . . . . . . . . . . . . . . . . . . 4-4 PERIODIC MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . 4-9 Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Maintenance chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 Greasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 Cleaning and adjusting spark plug. . . 4-13 Checking fuel system. . . . . . . . . . . . . . . . . . . . . . . . . 4-15 Cleaning fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16 Adjusting idling speed. . . . . . . . . . . . . . . . . . . . . . . 4-17 Checking water drain under engine oil tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Replacing fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Checking wiring and connectors . . . . . . 4-19 Exhaust leakage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Water leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Checking power trim and tilt system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20 Checking propeller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21 Changing gear oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Cleaning fuel tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 Inspecting and replacing anode . . . . . . . 4-25 Checking battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26 Checking bolts and nuts . . . . . . . . . . . . . . . . . . . . 4-29 Motor exterior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29 Coating the boat bottom . . . . . . . . . . . . . . . . . . . 4-29 E EMK10011* SPECIFICATION DATA Model Item DIMENSIONS 8Overall Length 8Overall Width 8Overall Height 8Transom height 8Weight PERFORMANCE 8Full throttle operating range 8Maximum output 8Idling speed ENGINE 8Engine type Number of cylinder Displacement Bore × stroke 8Ignition system 8Spark plug Spark plug gap 8Control system 8Starting system 8Battery capacity Minimum cold crank performance Minimum reserve capacity 8Alternator output 8Starting carburetion system DRIVE UNIT 8Gear positions Gear ratio 8Trim and tilt system 8Propeller mark FUEL AND OIL 8Fuel Fuel tank capacity 8Recommended engine oil Oil tank capacity 8Lubrication 8Fuel/oil ratio 8Recommended gearcase oil Gear oil quantity TIGHTNING TORQUE 8Spark plug 8Propeller nut L (US gal, Imp gal) Regular-unleaded gasoline (petrol) (P. O. N. : minimum 86) -- YAMALUBE 2 STROKE OUTBOARD OIL, or an equivalent TC-W3 certified outboard oil Engine: 1. 5 (1. 6, 1. 3) Remote: -- YAMAHA PRECISION BLEND SYSTEM -- Hypoid gear oil (SAE 90) 430 (14. 5, 15. 1) 25 (2. 5, 18) 35 (3. 5, 25) Forward-Neutral-Reverse 1. 85 (24/13) Manual tilt G 2-stroke, L 3 698 (42. 6) 67. 0 × 66. 0 (2. 6 × 2. 6) C. D. I system B7HS-10 0. 9­1. 0 (0. 035­0. 039) Tiller control Manual start -- -- -- 12-(80) Choke valve start system r/min kW (HP) r/min 4, 500­5, 500 29. 4 (40) at 5, 000 r/min 750­850 mm (in. ) mm (in. ) mm (in. ) mm (in. ) kg (lb. ) 1, 281 (50. 4) 349 (13. 7) --/1, 350 (53. 1)/-- --/533 (21. 0)/-- --/77. 5 (171)/-- Unit 40MHA S/L/X S/L/X S/L/X cm3 (cu. in. ) mm (in. ) NGK mm (in. ) V-AH Amps a-17. 8°C (0°F) minutes at 26. 7°C (80°F) V-Amp (W) L (US qt, Imp qt) cm3 (US oz, Imp oz) N·m (kgf·m, lb·ft) N·m (kgf·m, lb·ft) 4-1 E 40TRA 50TRA 50EJRA 646 (25. 4) 360 (14. 2) --/1, 319 (51. 9)/1, 464 (57. 6) --/533 (21. 0)/647 (25. 5) --/88 (194)/91. 5 (202) 670 (26. 4) 360 (14. 2) --/1, 319 (51. 9)/-- --/533 (21. 0)/-- --/88. 0 (194)/-- 670 (26. 4) 360 (14. 2) -- -- -- 4, 500­5, 500 29. 4 (40) at 5, 000 r/min 750­850 4, 500­5, 500 36. 8 (50) at 5, 000 r/min 750­850 4, 500­5, 500 36. 8 (50) at 5, 000 r/min 750­850 2-stroke, L 3 698 (42. 6) 67. 0 × 66. 0 (2. 6 × 2. 6) C. D. I system B7HS-10 0. 9­1. 0 (0. 035­0. 039) Remote control Electric start 12-70­100 400 85 12-6 Prime start system 2-stroke, L 3 698 (42. 6) 67. 0 × 66. 0 (2. 6 × 2. 6) C. D. I system B8HS-10 0. 9­1. 0 (0. 035­0. 039) Remote control Electric start 12-70­100 400 85 12-6 Prime start system 2-stroke, L 3 698 (42. 6) 67. 0 × 66. 0 (2. 6 × 2. 6) C. D. I system B8HS-10 0. 9­1. 0 (0. 035­0. 039) Remote control Electric start 12-70­100 400 85 12-6 Prime start system Forward-Neutral-Reverse 1. 85 (24/13) Power trim and tilt G Forward-Neutral-Reverse 1. 85 (24/13) Power trim and tilt G -- -- Hydro tilt (Hydraulic tilt) -- Regular-unleaded gasoline (P. O. N. : minimum 86) Regular-unleaded gasoline (P. O. N. : minimum 86) Regular-unleaded gasoline (P. O. N. : minimum 86) -- YAMALUBE 2 STROKE OUTBOARD OIL, or an equivalent TC-W3 certified outboard oil Engine: 1. 5 (1. 6, 1. 3) Remote: -- YAMAHA PRECISION BLEND SYSTEM -- Hypoid gear oil (SAE 90) 430 (14. 5, 15. 1) 25 (2. 5, 18) 35 (3. 5, 25) -- YAMALUBE 2 STROKE OUTBOARD OIL, or an equivalent TC-W3 certified outboard oil Engine: 1. 5 (1. 6, 1. 3) Remote: -- YAMAHA PRECISION BLEND SYSTEM -- Hypoid gear oil (SAE 90) 430 (14. 5, 15. 1) 25 (2. 5, 18) 35 (3. 5, 25) -- YAMALUBE 2 STROKE OUTBOARD OIL, or an equivalent TC-W3 certified outboard oil Engine: 1. 5 (1. 6, 1. 3) Remote: -- YAMAHA PRECISION BLEND SYSTEM -- -- -- 25 (2. 5, 18) -- 4-2 E EMU01369* TRANSPORTING AND STORING OUTBOARD MOTOR w 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. TRAILERING OUTBOARD MOTOR The motor should be trailered and stored in the normal running position. If there is insufficient road clearance in this position, then trailer the motor in the tilt position using a motor support device such as a transom saver bar. cC Do not use the tilt support lever/knob when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the motor can not be trailered in the down position, use an additional support device to secure it in the up position. w 8 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 accidentally falls. 8 USE CARE when transporting fuel tank, whether in a boat or car. DO NOT fill fuel container to maximum capacity. Gasoline will expand considerably as it warms up and can build up pressure in the fuel container. This can cause fuel leakage and a potential fire hazard. 4-3 E EMK16010 STORING OUTBOARD MOTOR When storing your Yamaha outboard for prolonged periods of time, (2 months or longer), several important procedures must be performed to prevent expensive damage. [. . . ] don't forget to include any important information such as names, addresses, model, engine serial number, dates, and receipts. CHANGE OF ADDRESS The federal government requires each manufacturer of a motor vehicle to maintain a complete, up-to-date list of all first purchasers against the possibility of a safety-related defect and recall. This list is complied from the purchase registrations sent to Yamaha Motor Corporation, U. S. A. by the selling dealer at the time of your purchase. [. . . ]

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