Yamaha 70 manual

70 O WNER’S MANU AL 6H3-28199-1T U .S.A.Edition LIT -18626-06-95 6H3-9-1T Hyoshi 06.2.9 16:15 ページ 1[...]

EMU25060 ZMU01690 Read this owner ’ s manual carefully before operating your outboard motor. 6H3-9-1T Hyoshi 06.2.9 16:15 ページ 2[...]

Important manual information EMU31280 To the owner Thank you for choosing a Yamaha outboard motor. This Owner’s Manual contains infor- mation needed for proper operation, mainte- nance and care. A thorough understanding of these simple instructions will help you ob- tain maximum enjoyment from your new Yamaha. If you have any question about the o[...]

Table of contents General information .......................... 1 Identification numbers record .......... 1 Outboard motor serial number .......... 1 Key number ....................................... 1 Emission control information ........... 1 North American models..................... 1 Safety information ........................... 2 Importan[...]

Table of contents models .......................................... 33 Shifting .......................................... 33 Forward (tiller handle and remote control models) ............................. 33 Reverse (automatic reverse lock and power trim and tilt models) ..... 34 Stopping engine ............................ 34 Procedure ..........[...]

1 General information EMU25170 Identification numbers record EMU25183 Outboard motor serial number The outboard motor serial number is stamped on the label attached to the port side of the clamp bracket. Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in [...]

General information 2 EMU25262 Manufactured date label This label is attached to the clamp bracket or the swivel bracket. EMU25362 Safety information ● Before mounting or operating the outboard motor, read this entire manual. Reading it should give you an understanding of the motor and its operation. ● Before operating the boat, read any own- e[...]

General information 3 clude nausea, dizziness, and drowsiness. Keep cockpit and cabin areas well ventilat- ed. Avoid blocking exhaust outlets. ● Check throttle, shift, and steering for prop- er operation before starting the engine. ● Attach the engine stop switch lanyard cord to a secure place on your clothing, or your arm or leg while operatin[...]

General information 4 EMU25401 Label W ARNING EWM01260 ● Be sure shift control is in neutral before starting engine. (except 2HP) ● Do not touch or remove electrical parts when starting or during operation. ● Keep hands, hair, and clothes away from flywheel and other rotating parts while engine is running. EMU25500 Basic boating rules (Rules [...]

General information 5 sel head-on) Crossing: (you are traveling across the oth- er vessel ’ s path) Overtaking: (you are passing or being passed by another vessel) In the following illustration, your boat is in the center. You should give the right-of-way to any vessels shown in white area (you are the Give-Way vessel). Any vessels in the shad- e[...]

General information 6 bend that may obstruct the view of other wa- ter vessels, the operator should sound a pro- longed blast on the whistle (4 to 6 seconds). If another vessel is around the bend, it too should sound the whistle. Even if no reply is heard, however, the vessel should still pro- ceed around the bend with caution. If you navigate such[...]

General information 7 EMU25540 Fueling instructions W ARNING EWM00010 GASOLINE AND ITS VAPORS ARE HIGH- LY FLAMMABLE AND EXPLOSIVE! ● Do not smoke when refueling, and keep away from sparks, flames, or other sources of ignition. ● Stop engine before refueling. ● Refuel in a well-ventilated area. Refuel portable fuel tanks off the boat. ● Tak[...]

General information 8 dry rags. ● Do not overfill the fuel tank. ● Tighten the filler cap securely after re- fueling. ● If you should swallow some gasoline, inhale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical attention. ● If any gasoline spills onto your skin, im- mediately wash with soap and water. Change cl[...]

General information 9 speed is too high or too low for good engine performance, this will have an adverse effect on the engine. Yamaha outboard motors are fitted with pro- pellers chosen to perform well over a range of applications, but there may be uses where a propeller with a different pitch would be more appropriate. For a greater operating loa[...]

10 Basic components EMU25797 Main components NO TE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. 70 EMU25802 Fuel tank If your model was equipped with a portable fuel tank, its function is as follows. W ARNING EWM00020 The fuel tank supplied with this engine is its dedicated fuel reservoir and must [...]

Basic components 11 tions. EMU25830 Fuel joint This joint is used to connect the fuel line. EMU25841 Fuel gauge This gauge is located on either the fuel tank cap or on the fuel joint base. It shows the ap- proximate amount of fuel remaining in the tank. EMU25850 Fuel tank cap This cap seals the fuel tank. When removed, the tank can be filled with f[...]

Basic components 12 EMU26201 Neutral interlock trigger To shift out of neutral, first pull the neutral in- terlock trigger up. EMU26211 Neutral throttle lever To open the throttle without shifting into ei- ther forward or reverse, put the remote con- trol lever in the neutral position and lift the neutral throttle lever. NO TE: The neutral throttle[...]

Basic components 13 EMU25941 Throttle grip The throttle grip is on the tiller handle. Turn the grip counterclockwise to increase speed and clockwise to decrease speed. EMU25961 Throttle indicator The fuel consumption curve on the throttle indicator shows the relative amount of fuel consumed for each throttle position. Choose the setting that offers[...]

Basic components 14 When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. EMU25990 Engine stop lanyard switch The lock plate must be attached to the en- gine stop switch for the engine to run. The lanyard should be attached to a secure place on the operator ’ s clothing, or arm or leg. Should the operato[...]

Basic components 15 EMU26090 Main switch The main switch controls the ignition system; its operation is described below. ● “” (off) With the main switch in the “” (off) posi- tion, the electrical circuits are off, and the key can be removed. ● “” (on) With the main switch in the “” (on) posi- tion, the electrical circuits are on[...]

Basic components 16 EMU26151 Power trim and tilt switch on bottom engine cowling The power trim and tilt switch is located on the side of the bottom engine cowling. Press- ing the switch “” (up) trims the outboard motor up, then tilts it up. Pressing the switch “” (down) tilts the outboard motor down and trims it down. When the switch is re[...]

Basic components 17 EMU26261 Trim rod (tilt pin) The position of the trim rod determines the minimum trim angle of the outboard motor in relation to the transom. EMU26340 Tilt support lever for power trim and tilt or hydro tilt model To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp bracket. EMU26372 Top[...]

Basic components 18 EMU26470 Tachometer This gauge shows the engine speed and has the following functions. EMU26491 Digital tachometer The tachometer shows the engine speed and has the following functions. NO TE: All segments of the display will light momen- tarily after the main switch is turned on and will return to normal thereafter. NO TE: The [...]

Basic components 19 rious engine damage will occur. EMU26581 Overheat warning indicator (digital type) If the engine temperature rises too high, the warning indicator will start to blink. For fur- ther information on reading the indicator, see page 20. CAUTION: ECM00050 Do not continue to run the engine if the overheat warning indicator is on. Seri[...]

Basic components 20 engine has been run. It can be set to show the total number of hours or the number of hours for the current trip. The display can also be turned on and off. ● Changing the display format ● Pressing the “” (mode) button chang- es the display format in the following pat- tern: ● Total hours → Trip hours → Display off[...]

Basic components 21 EMU26846 Oil level warning and oil filter clogging warning Oil injection models This engine has an oil level warning system. If the oil level falls below the lower limit, the warning system will activate. Activation of warning device ● Engine speed will automatically decrease to about 2000 r/min. ● The oil level warning indi[...]

Basic components 22 1. Oil fi lter ZMU03828 1[...]

23 Operation EMU26901 Installation CAUTION: ECM00110 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 conti[...]

Operation 24 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 en- gine to overheat. If the mounting height is too low, the water resistance will increase and thereby reduc[...]

Operation 25 board (if packed). For details, consult your Yamaha dealer. W ARNING EWM00650 Avoid using bolts, nuts or washers other than those contained in the engine pack- aging. If used, they must be of at least the same quality of material and strength and must be tightened securely. After tighten- ing, test run the engine and check their tightn[...]

Operation 26 cool. 4. Remaining seven hours: Run the engine at any speed. However, avoid operating at full throttle for more than 5 minutes at a time. 5. After the first 10 hours: Operate the engine normally. Use only straight gasoline in the fuel tank. The Yamaha oil injection system provides proper lubrication for normal operation. EMU27102 Preop[...]

Operation 27 CAUTION: ECM00130 Be sure to take the above steps when op- erating the engine after a long period of storage. Otherwise engine seizure could occur. EMU27233 Filling fuel and engine oil EMU27242 Filling fuel for portable tank W ARNING EWM00060 Gasoline and its vapors are highly flam- mable and explosive. Keep away from sparks, cigarette[...]

Operation 28 EMU27311 Filling oil for electric start models W ARNING EWM00530 Do not add gasoline into the oil tank. Fire or explosion could result. This engine uses the Yamaha oil injection system, which provides superior lubrication by ensuring the proper oil ratio for all operat- ing conditions. No fuel premixing is needed. Simply pour gasoline [...]

Operation 29 EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27360 Electric start models EMU27450 Operating engine EMU27461 Feeding fuel (portable tank) W ARNING EWM00420 ● Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions.[...]

Operation 30 tank cap, loosen it 2 or 3 turns. 2. If there is a fuel joint on the motor, firmly connect the fuel line to the joint. Then firmly connect the other end of the fuel line to the joint on the fuel tank. 3. If a steering friction adjuster is provided on your outboard motor, securely attach the fuel line to the fuel line clamp. NO TE: Duri[...]

Operation 31 gine stop switch. W ARNING EWM00120 ● Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating. ● Do not attach the lanyard to clothing that could tear loose. Do not route the lanyard where it could become entan- gled, preventing it from functioning. ● Avoid accidentally pulling[...]

Operation 32 EMU27662 Electric start and remote control models 1. Place the remote control lever in neutral. NO TE: The start-in-gear protection device prevents the engine from starting except when in neu- tral. 2. Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then install the lock plate on the other [...]

Operation 33 again. NO TE: ● When the engine is cold, it needs to be warmed up. For further information, see page 33. ● If the engine is warm and fails to start, open the throttle slightly and try to start the engine again. If the engine still fails to start, see page 60. EMU27670 Warming up engine EMU27702 Electric start and prime start models[...]

Operation 34 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) W ARNING EWM00190 When operating in reverse, go slowly. Do not open the throt[...]

Operation 35 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 e[...]

Operation 36 the boat, sea conditions, and running speed. W ARNING 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 r[...]

Operation 37 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 les[...]

Operation 38 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[...]

Operation 39 4. Push the tilt support knob into the clamp bracket or pull the tilt support lever to- ward you to support the engine. W ARNING 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 [...]

Operation 40 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[...]

Operation 41 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. 2. Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch / power til[...]

42 Maintenance EMU31480 Specifications NO TE: “ (AL) ” stated in the specification data below represents the numerical value for the alumi- num propeller installed. Likewise, “ (SUS) ” represents the value for stainless steel propeller installed and “ (PL) ” for plastic propeller installed. EMU28218 Dimension: Overall length: 713 mm (28[...]

Maintenance 43 Gear oil quantity: 610.0 cm 3 (20.62 US oz) (21.51 Imp.oz) Tightening torque for engine: Spark plug: 25.0 Nm (18.4 ft-lb) (2.55 kgf-m) Propeller nut: 35.0 Nm (25.8 ft-lb) (3.57 kgf-m) EMU28222 Transporting and storing outboard motor W ARNING EWM00690 ● Leaking fuel is a fire hazard. When transporting and storing the outboard motor,[...]

Maintenance 44 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. EMU28302 Procedure EMU28380 Flushing with the flushing attachment 1. Wash the outboard motor body using fresh water. For further information, see page 46. 2. Fill the[...]

Maintenance 45 NO TE: A flushing attachment is available from your Yamaha dealer. EMU28410 Lubrication (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 49. 2. Fill the oil tanks. This prevents the for- mation of condensati[...]

Maintenance 46 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. EMU28450 Cleaning the outboard motor After use, wash the exterior of the outboard motor with fresh wat[...]

Maintenance 47 EMU28522 Maintenance chart Frequency of maintenance operations may be adjusted according to the operating condi- tions, but the following table gives general guidelines. Refer to the sections in this chapter for explanations of each owner-specific action. NO TE: When operating in salt water, turbid or muddy water, the engine should b[...]

Maintenance 48 EMU28931 Greasing Yamaha marine grease (Water resistant grease) 70 Throttle link / throttle cable / throttle pic k-up timing Inspection / adjustment W ater pump Inspection / replace- ment Oil pump Inspection / adjustment Oil tank water drain Inspection / cleaning Spark plug(s) Cleaning / adjustment / replacement Item Actions Initial [...]

Maintenance 49 EMU28952 Cleaning and adjusting spark plug W ARNING EWM00560 When removing or installing a spark plug, be careful not to damage the insulator. A damaged insulator could allow external sparks, which could lead to explosion or fire. The spark plug is an important engine com- ponent and is easy to inspect. The condition of the spark plu[...]

Maintenance 50 sources of ignition. W ARNING EWM00910 Leaking fuel can result in fire or explo- sion. ● Check for fuel leakage regularly. ● If any fuel leakage is found, the fuel system must be repaired by a qualified mechanic. Improper repairs can make the outboard unsafe to operate. Check the fuel lines for leaks, crack, or mal- function. If [...]

Maintenance 51 spilled fuel in a rag. 3. Remove the filter element, and wash it in solvent. Allow it to dry. Inspect the filter element and O-ring to make sure they are in good condition. Replace them if necessary. If any water is found in the fuel, the Yamaha portable fuel tank or other fuel tanks should be checked and cleaned. 4. Reinstall the fi[...]

Maintenance 52 EMU29112 Checking wiring and connectors ● Check that each grounding wire is properly secured. ● Check that each connector is engaged se- curely. EMU29120 Exhaust leakage Start the engine and check that no exhaust leaks from the joints between the exhaust cover, cylinder head, and body cylinder. EMU29130 Water leakage Start the en[...]

Maintenance 53 5. Check that the tilt rod and trim rods are free of corrosion or other flaws. 6. Activate the tilt-down switch until the trim rods have retracted completely into the cylinders. 7. Activate the trim-up switch until the tilt rod is fully extended. Unlock the tilt sup- port lever. 8. Tilt the outboard motor down. Check that the tilt ro[...]

Maintenance 54 tion, or other damage. ● Check the propeller shaft for damage. ● Check the splines / shear pin for wear or damage. ● Check for fish line tangled around the pro- peller shaft. ● Check the propeller shaft oil seal for dam- age. NO TE: If the shear pin equipped: it is designed to break if the propeller hits a hard underwater obs[...]

Maintenance 55 fore installing the propeller, otherwise the lower case and propeller boss could be damaged. ● Be sure to use a new cotter pin and bend the ends over securely. Otherwise the propeller could come off during op- eration and be lost. 1. Apply Yamaha marine grease or a cor- rosion resistant grease to the propeller shaft. 2. Install the[...]

Maintenance 56 damage. Consult a Yamaha dealer for re- pair of the lower unit seals. NO TE: For disposal of used oil, consult your Yamaha dealer. 5. With the outboard motor in a vertical po- sition, and using a flexible or pressur- ized filling device, inject the gear oil into the gear oil drain screw hole. 6. Put a new gasket on the oil level plug[...]

Maintenance 57 corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Yamaha dealer for replacement of external anodes. CAUTION: ECM00720 Do not paint anodes, as this would render them ineffective. NO TE: Inspect ground leads attached to external anodes on equipped models.[...]

Maintenance 58 deteriorate. ● Ordinary tap water contains minerals harmful to a battery, and should not be used for topping up. 1. Check the electrolyte level at least once a month. Fill to the manufacturer ’ s rec- ommended level when necessary. Top up only with distilled water (or pure de- ionized water suitable to use in batter- ies). 2. Alw[...]

Maintenance 59 EMU29390 Checking top cowling Check the fitting of the top cowling by push- ing it with both hands. If it is loose have it re- paired by your Yamaha dealer. EMU29400 Coating the boat bottom A clean hull improves boat performance. The boat bottom should be kept as clean of ma- rine growth as possible. If necessary, the boat bottom can[...]

60 Trouble Recovery EMU29424 Troubleshooting A problem in the fuel, compression, or igni- tion systems can cause poor starting, loss of power, or other problems. This section de- scribes basic checks and possible remedies, and covers all Yamaha outboard motors. Therefore some items may not apply to your model. If your outboard motor requires repair[...]

Trouble Recovery 61 Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system. Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Have ignition parts failed? A. Have serviced by a Yamaha dealer. Q. Has warning system activ[...]

Trouble Recovery 62 A. Have serviced by a Yamaha dealer. Q. Is load on boat improperly distributed? A. Distribute load to place boat on an even plane. Q. Is water pump or thermostat faulty? A. Have serviced by a Yamaha dealer. Q. Is there excess water in fuel filter cup? A. Drain filter cup. Engine power loss. Q. Is propeller damaged? A. Have prope[...]

Trouble Recovery 63 Q. Is fuel joint connection incorrect? A. Connect correctly. Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with rec- ommended type. Q. Is high pressure fuel pump drive belt bro- ken? A. Have serviced by a Yamaha dealer. Q. Is engine not responding properly to shift lever position? A. Have service[...]

Trouble Recovery 64 NO TE: Consult your Yamaha dealer if the new fuse immediately blows again. EMU29511 Power trim and tilt / power tilt will not operate If the engine cannot be tilted up or down with the power trim and tilt / the power tilt because of a discharged battery or a failure with the power trim and tilt unit / the power tilt unit, the en[...]

Trouble Recovery 65 engine. Use the emergency starter rope only as instructed. Do not touch the fly- wheel or other moving parts when the engine is running. Do not install the starter mechanism or top cowling after the engine is running. ● Do not touch the ignition coil, spark plug wire, spark plug cap, or other elec- trical components when start[...]

Trouble Recovery 66 NO TE: When the engine does not start with this pro- cedure, see page 66. EMU29670 Engine fails to operate EMU29691 Ignition system malfunction If the battery voltage is low or in the unlikely event of an ignition system malfunction, the engine speed may become erratic or the en- gine may stop. In such a situation, follow the pr[...]

Trouble Recovery 67 4. Open the throttle slightly without shifting using the throttle grip, neutral throttle le- ver or free accelerator. It is necessary to change the throttle opening slightly de- pending on the engine temperature. Af- ter the engine starts, return the throttle to its original position. 5. Turn the main switch to “” (on). 6. T[...]

Trouble Recovery 68 NO TE: When the starter mechanism malfunctions, see page 64. EMU29760 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immedi- ately. If you cannot immediately take the outboard motor to a Yamaha dealer, follow the proce- dure bel[...]

69 Consumer information EMU29811 Important warranty information for U.S.A. and Canada[...]

Consumer information 70[...]

Consumer information 71 EMU29820 YAMAHA MOTOR CORPORATION, U.S.A. OUTBOARD MOTOR TWO YEAR LIMITED WARRANTY[...]

Consumer information 72[...]

Consumer information 73[...]

Consumer information 74 EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA[...]

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Printed in Japan April 2006–0.3 × 1 ! Printed on recycled paper 6H3-9-1T Hyoshi 06.2.9 16:15 ページ 4[...]

YAMAHA MOTOR CO., LTD. MADE IN JAPAN PAYS D'ORIGINE JAPON OUTBOARD MOTOR W ARRANTY REGISTRA TION ENREGISTREMENT DE LA GARANTIE DU MO TEUR HORS-BORD Please complete and mail this card. This information is necessary to accurately register your unit for warranty . V euillez signer ci-dessous pour attester que le montage et l’inspection ont ét?[...]