User manual YAMAHA 25HP-2001

[. . . ] In this Owner's Manual particularly important information is distinguished in the following ways. The Safety Alert Symbol means ATTENTION!YOUR SAFETY IS INVOLVED! cC A CAUTION indicates special precautions that must be taken to avoid damage to the outboard motor. NOTE: A NOTE provides key information to make procedures easier or clearer. [. . . ] Excessive trim-up can cause the propeller to ventilate, which reduces performance further. When trimmed-out too much, a boat may "porpoise" (hop in the water), which could throw the operator and passengers overboard. EMU00283 105011 2 Bow Down When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. Too much trim-in causes the boat to "plow" through the water, decreasing fuel economy and making in hard to increase speed. Operating 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 operation difficult and dangerous. 1 Bow up 2 Bow down 3 Optimum angle 105013 3 105015 3-28 E EMG70011 CRUISING IN SHALLOW WATER Manual tilt model The outboard motor can be tilted up partially to allow operation in shallow water. 000832 w 8 Place the gear shift in the Neutral position before using the shallow water cruising system. 8 Run the boat at the lowest possible speed when using the shallow water cruising system. 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 25 Place the gear-shift in the Neutral position before using the shallow water cruising system. EMG71310 PROCEDURE 25 1) 402061** 2) Place the gear shift lever in the neutral position. 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. 3-34 E -MEMO- E EMK00010 Chapter 4 MAINTENANCE 1 2 3 4 5 6 SPECIFICATION DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 TRANSPORTING AND STORING OUTBOARD MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Trailering outboard motor. . . . . . . . . . . . . . . . . . . 4-4 Storing outboard motor . . . . . . . . . . . . . . . . . . . . . . 4-5 PERIODIC MAINTENANCE. . . . . . . . . . . . . . . . . . . . 4-10 Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 Maintenance chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 Cleaning and adjusting spark plug. . 4-12 Checking fuel system. . . . . . . . . . . . . . . . . . . . . . . . . 4-14 Inspecting fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15 Adjusting idling speed. . . . . . . . . . . . . . . . . . . . . . . 4-16 Checking water drain under engine oil tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17 Replacing fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Checking wiring and connectors . . . . . . 4-18 Exhaust leakage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Water leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Greasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Checking propeller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 Changing gear oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 Cleaning fuel tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 Inspecting and replacing anode(s) . . . 4-26 Checking battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Checking bolts and nuts . . . . . . . . . . . . . . . . . . . . 4-30 Motor exterior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30 Coating the boat bottom . . . . . . . . . . . . . . . . . . . 4-30 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 8Type 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/tilt system 8Propeller mark FUEL AND OIL 8Fuel Fuel tank capacity 8Recommended engine oil Oil tank capacity 8Fuel/oil ratio 8Recommended gearcase oil Gear oil capacity TIGHTENING TORQUE 8Spark plug 8Propeller nut N·m (kgf·m, lb·ft) N·m (kgf·m, lb·ft) 25 (2. 5, 18) 35 (3. 5, 25) L (US gal, Imp gal) Regular-unleaded gasoline (P. O. N. : minimum 86) 25 (6. 6, 5. 5) YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outboard oil. -- 100 : 1 Hypoid gear oil (SAE 90) 370 (12. 5, 13. 0) Forward-Neutral-Reverse 2. 08 (27/13) Manual F 2-stroke, L 2 395 (24. 1) 67 × 56 (2. 6 × 2. 2) C. D. I system B7HS-10 0. 9~1. 0 (0. 035~0. 039) Tiller control Manual start -- -- -- 12V-(80W) Choke start system r/min kW (HP) r/min 5, 000~6, 000 18. 4 (25) at 5, 500 r/min 700~800 mm (in. ) mm (in. ) mm (in. ) mm (in. ) kg (lb. ) 936 (369) 358 (14. 1) 1, 068 (42. 0)/1, 195 (47. 0) 419 (16. 5)/546 (21. 5) 49. 0 (108. 0)/50. 5 (111. 3) Unit 25MHA S/L S/L S/L cm3 (cu. in. ) mm (in. ) NGK mm (in. ) V-AH Amps at ­17. 8°C (0°F) minutes at 26. 7°C (80°F) V-A (W) L (US qt, Imp qt) cm3 (US oz, Imp oz) 4-1 E 25MHA3 30MHA 30EHA 993 (39. 1) 360 (14. 2) 1, 158 (45. 6)/-- 424 (16. 7)/-- 59. 0 (130. 1)/-- 993 (39. 1) 360 (14. 2) 1, 158 (45. 6)/1, 279 (50. 4) 424 (16. 7)/545 (21. 5) 60. 0 (132. 3)/62. 0 (136. 7) 993 (39. 1) 360 (14. 2) -- /1, 279 (50. 4) -- /545 (21. 5) -- /64. 5 (142. 2) 4, 500~5, 500 18. 4 (25) at 5, 000 r/min 700~800 4, 500~5, 500 22. 1 (30) at 5, 000 r/min 700~800 4, 500~5, 500 22. 1 (30) at 5, 000 r/min 700~800 2-stroke, L 3 496 (30. 3) 59. 5 × 59. 5 (2. 3 × 2. 3) C. D. I system B7HS-10 0. 9~1. 0 (0. 035~0. 039) Tiller control Manual start -- -- -- 12V-(80W) Choke start system 2-stroke, L 3 496 (30. 3) 59. 5 × 59. 5 (2. 3 × 2. 3) C. D. I system B7HS-10 0. 9~1. 0 (0. 035~0. 039) Tiller control Manual start -- -- -- 12V-(80W) Choke start system 2-stroke, L 3 496 (30. 3) 59. 5 × 59. 5 (2. 3 × 2. 3) C. D. I system B7HS-10 0. 9~1. 0 (0. 035~0. 039) Tiller control Electric start 12-40~70 210 40 12V-6A Choke start system Forward-Neutral-Reverse 1. 85 (24/13) Manual F Forward-Neutral-Reverse 1. 85 (24/13) Manual F Forward-Neutral-Reverse 1. 85 (24/13) Manual F Regular-unleaded gasoline (P. O. N. : minimum 86) 25 (6. 6, 5. 5) YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outboard oil. -- 100 : 1 Hypoid gear oil (SAE 90) 200 (6. 8, 7. 0) Regular-unleaded gasoline (P. O. N. : minimum 86) 25 (6. 6, 5. 5) YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outboard oil. Engine: 0. 9 (1. 0, 0. 8) -- Hypoid gear oil (SAE 90) 370 (12. 5, 13. 0) Regular-unleaded gasoline (P. O. N. : minimum 86) 25 (6. 6, 5. 5) YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outboard oil. Engine: 0. 9 (1. 0, 0. 8) -- Hypoid gear oil (SAE 90) 370 (12. 5, 13. 0) 25 (2. 5, 18) 35 (3. 5, 25) 25 (2. 5, 18) 35 (3. 5, 25) 25 (2. 5, 18) 35 (3. 5, 25) 4-2 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 8Type 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/tilt system 8Propeller mark FUEL AND OIL 8Fuel Fuel tank capacity 8Recommended engine oil Oil tank capacity 8Fuel/oil ratio 8Recommended gearcase oil Gear oil capacity TIGHTENING TORQUE 8Spark plug 8Propeller nut N·m (kgf·m, lb·ft) N·m (kgf·m, lb·ft) 25 (2. 5, 18) 35 (3. 5, 25) L (US gal, Imp gal) Regular-unleaded gasoline (P. O. N. : minimum 86) 25 (6. 6, 5. 5) YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outboard oil. Engine: 0. 9 (1. 0, 0. 8) -- Hypoid gear oil (SAE 90) 370 (12. 5, 13. 0) Forward-Neutral-Reverse 1. 85 (24/13) Manual F 2-stroke, L 3 496 (30. 3) 59. 5 × 59. 5 (2. 3 × 2. 3) C. D. I system B7HS-10 0. 9~1. 0 (0. 035~0. 039) Remote control Electric start 12-40~70 210 40 12V-6A Choke start system r/min kW (HP) r/min 4, 500~5, 500 22. 1 (30) at 5, 000 r/min 700~800 mm (in. ) mm (in. ) mm (in. ) mm (in. ) kg (lb. ) 662 (26. 1) 307 (12. 1) -- /1, 261 (49. 6) -- /545 (21. 5) -- /62. 0 (136. 7) Unit 30ERA S/L S/L S/L cm3 (cu. in. ) mm (in. ) NGK mm (in. ) V-AH Amps at ­17. 8°C (0°F) minutes at 26. 7°C (80°F) V-A (W) L (US qt, Imp qt) cm3 (US oz, Imp oz) 4-3 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. 000929 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. [. . . ] If a question or problem arises regarding warranty, first contact the owner of the dealership. Since all warranty matters are handled at the dealer level, this person is in the best position to help you. If you are still not satisfied and require additional assistance, please write: YAMAHA MOTOR CORPORATION U. S. A. CUSTOMER RELATIONS DEPARTMENT P. O. Box 6555 Cypress, California 90630 When contacting Yamaha Motor Corporation, U. S. A. [. . . ]