Yamaha 6C Owner's Manual
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Summary of Contents for Yamaha 6C
- Page 1 OWNER’S MANUAL qRead this manual carefully before operating this outboard motor. 6M8-F8199-2F...
- Page 2 EMU25052 Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
- Page 3 Any damage tain maximum enjoyment from your new resulting from neglect of these instructions is Yamaha. If you have any question about the not covered by warranty. operation or maintenance of your outboard Some countries have laws or regulations re- motor, please consult a Yamaha dealer.
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Page 4: Table Of Contents
Table of contents Safety information......1 Fuel tank ......... 12 Fuel joint.......... 13 Outboard motor safety ..... 1 Fuel gauge ........13 Propeller..........1 Fuel tank cap........13 Rotating parts........1 Air vent screw........13 Hot parts ........... 1 Tiller handle ........13 Electric shock ........ - Page 5 Table of contents Warming up engine ......28 Installing propeller ......45 Choke start models ......28 Changing gear oil ......45 Checks after engine warm up ..29 Cleaning fuel tank ......47 Shifting ..........29 Inspecting and replacing anode(s)........
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Page 6: Safety Information
Safety information engine stops if the operator falls overboard EMU33622 Outboard motor safety or leaves the helm. This prevents the boat Observe these precautions at all times. from running away under power and leaving EMU36501 people stranded, or running over people or Propeller objects. -
Page 7: Modifications
Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han- recommends that you must wear a PFD dling and lead to an accident, capsizing or whenever boating. -
Page 8: Weather
Safety information keep a safe distance away from people, ob- jects, and other boats. Do not follow directly behind other boats or waterskiers. Avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are going. -
Page 9: General Information
Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for ZMU02838 reference in case your outboard motor is sto- len. -
Page 10: Read Manuals And Labels
Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33832 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. 6C, 8C ZMU06306... - Page 11 General information ZMU05697 EMU33912 Contents of labels EWM01671 The above warning labels mean as follows. WARNING Read Owner’s Manuals and labels. EWM01691 Wear an approved personal flotation WARNING device (PFD). Emergency starting does not have start- Attach engine shut-off cord (lanyard) to ...
- Page 12 General information Electrical hazard EMU35132 Symbols The following symbols mean as follows. Notice/Warning ZMU05666 ZMU05696 Read Owner’s Manual ZMU05664 Hazard caused by continuous rotation ZMU05665...
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Page 13: Specifications And Requirements
Specifications and requirements 2-stroke L EMU31480 Specifications Displacement: TIP: 165.0 cm Bore stroke: “(AL)” stated in the specification data below 50.0 42.0 mm (1.97 1.65 in) represents the numerical value for the alumi- Ignition system: num propeller installed. Likewise, “(SUS)”... -
Page 14: Installation Requirements
EWM01560 appropriate. WARNING Your Yamaha dealer can help you select the Overpowering a boat can cause severe right propeller for your boating needs. Select instability. a propeller that will allow the engine to reach... -
Page 15: Start-In-Gear Protection
Use a good quality gasoline that meets the minimum octane rating. If knocking or ping- ing occurs, use a different brand of gasoline or premium unleaded fuel. Yamaha re- comends that you use alcohol-free (see Gas- ohol) gasoline whenever possible. -
Page 16: Muddy Or Acidic Water
Specifications and requirements engine starting and running problems. EMU36352 Emergency equipment Yamaha does not recommend gasohol con- Keep the following items onboard in case taining methanol because it can cause fuel there is trouble with the outboard motor. system damage or engine performance A tool kit with assorted screwdrivers, pli- problems. -
Page 17: Components
Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els (order from dealer). 6C, 8C ZMU02845 1. Manual starter handle 16. Cooling water pilot hole 2. Choke knob 17. -
Page 18: Fuel Joint
Components mercial users should conform to relevant licensing or approval authority regula- tions. ZMU02846 EMU25924 Gear shift lever ZMU02284 Move the gear shift lever forward to engage the forward gear or rearward to engage the 1. Fuel joint reverse gear. 2. -
Page 19: Throttle Indicator
Components or throttle grip, which could result in an accident. [EWM00032] ZMU02848 ZMU02850 EMU25962 Throttle indicator When constant speed is desired, tighten the The fuel consumption curve on the throttle adjuster to maintain the desired throttle set- indicator shows the relative amount of fuel ting. -
Page 20: Engine Stop Button
Components ZMU02851 ZMU02860 EMU26074 1. Clip Manual starter handle 2. Cord The manual starter handle is used to crank 3. Engine shut-off switch and start the engine. EMU26003 Engine stop button The engine stop button stops the engine when the button is pushed. EMU26122 Steering friction adjuster A friction device provides adjustable resis-... -
Page 21: Trim Rod (Tilt Pin)
Components ZMU02861 ZMU02853 EMU26280 Shallow water lever Pushing this lever down will tilt the motor up partially to provide more clearance when op- erating in shallow water. ZMU04508 To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise. -
Page 22: Cowling Lock Lever(S) (Turn Type)
Components ECM00660 NOTICE 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. -
Page 23: Installation
Installation EMU26902 Installation 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. EWM01590 WARNING ZMU01760... -
Page 24: Clamping The Outboard Motor
Test runs at different heights can help de- off the transom. termine the optimum mounting height. Consult your Yamaha dealer or boat man- ufacturer for further information on deter- mining the proper mounting height. For instructions on setting the trim angle of ... - Page 25 Installation packaging. If used, they must be of at least the same quality of material and strength and must be tightened se- curely. After tightening, test run the engine and check their tightness. [EWM00651] ZMU02637 1. Bolts...
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Page 26: Operation
Operation plane, then immediately reduce the EMU36381 First-time operation throttle to 3000 r/min or less. Next two hours: EMU30174 Breaking in engine Accelerate at full throttle onto plane, Your new engine requires a period of break- then reduce engine speed to three-quar- in to allow mating surfaces of moving parts to ter throttle (approximately 4000 r/min). -
Page 27: Fuel Level
Operation the outboard unsafe to operate. EMU37141 Fuel level EMU36451 Be sure you have plenty of fuel for your trip. Check for fuel leaks A good rule is to use 1/3 of your fuel to get to Check for fuel leaks or gasoline fumes in ... -
Page 28: Engine
After installing, check the fitting of the top tank and tighten the air vent screw on cowling by pushing it with both hands. If the the fuel tank cap. top cowling is loose, have it repaired by your Yamaha dealer. -
Page 29: Gasoline And Oil Mixing (100:1)
Operation ZMU02834 ZMU06621 Tighten the filler cap securely. 10. Wipe up any spilled gasoline immediate- ly with dry rags. Dispose rags properly according to local laws or regulations. EMU27406 Gasoline and oil mixing (100:1) ECM00811 NOTICE Avoid using any oil other than the spec- ... -
Page 30: Operating Engine
Operation Shake the fuel tank to mix the fuel thor- oughly. Make sure that the oil and gasoline are 100:1 12 L 14 L 24 L mixed. (0.26 US gal, (3.2 US gal, (3.7 US gal, (6.3 US gal, 0.22 Imp gal) 2.6 Imp gal) 3.1 Imp gal) 5.3 Imp gal) -
Page 31: Sending Fuel (Portable Tank)
Operation in areas well ventilated. Avoid blocking exhaust outlets. EMU27468 Sending fuel (portable tank) If there is an air vent screw on the fuel tank cap, loosen it 2 or 3 turns. ZMU02024 TIP: Wipe up any spilled gasoline immediately with dry rags. - Page 32 Operation EMU27508 Manual start models (tiller control) EWM01840 WARNING Failure to attached engine shut-off cord could result in a runaway boat if opera- tor is ejected. Attach the engine shut- off cord to a secure place on your cloth- ing, or your arm or leg while operating.
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Page 33: Checks After Starting Engine
Slowly return the throttle grip to the fully case or the cooling water pilot hole is closed position. blocked. Consult your Yamaha dealer if the problem cannot be located and cor- rected. ZMU02030... -
Page 34: Checks After Engine Warm Up
Operation backward (for reverse gear). Be sure to EMU36531 Checks after engine warm up check that the tilt lock lever is in the lock/down position (if equipped) before EMU36541 Shifting operating in reverse. While the boat is tightly moored, and without applying throttle, confirm that the engine shifts smoothly into forward and reverse, and back to neutral. -
Page 35: Stopping Boat
Operation EMU31742 Stopping boat EWM01510 WARNING Do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or im- pact the steering wheel or other parts of the boat. -
Page 36: Trimming Outboard Motor
Operation EMU27862 Trimming outboard motor EWM00740 WARNING 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 readjust the trim angle. -
Page 37: Adjusting Boat Trim
Operation bow up, the boat may have a greater tenden- cy to steer to one side or the other. Compen- sate for this as you steer. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. ZMU02859 1. -
Page 38: Tilting Up And Down
Operation the bow is greatly increased, heightening the ECM00241 NOTICE danger of “bow steering” and making opera- Before tilting the outboard motor, stop tion difficult and dangerous. the engine by following the procedure on page 30. Never tilt the outboard mo- tor while the engine is running. -
Page 39: Procedure For Tilting Down (Manual Tilt Models)
Operation ZMU02888 ZMU02854 Hold the rear of the top cowling with one Slowly tilt the engine down. hand and tilt the engine up fully. EMU28062 Shallow water Push the tilt support knob into the clamp bracket. Or the tilt support bar will turn to EMU28073 Cruising in shallow water (manual tilt lock... -
Page 40: Cruising In Other Conditions
Also rinse the outside of the outboard motor with fresh wa- ter. ZMU02868 Cruising in muddy, turbid, or acidic water Yamaha strongly recommends that you use EMU28110 Procedure the optional chromium-plated water pump kit Place the gear shift lever in neutral. -
Page 41: Maintenance
Leaking fuel is a fire hazard. When such as a transom saver bar. Consult your transporting and storing the outboard Yamaha dealer for further details. motor, disconnect the fuel line from the outboard motor to prevent fuel from leaking. -
Page 42: Storing Outboard Motor
EMU30272 Storing outboard motor plate. NOTICE: If the fresh water level When storing your Yamaha outboard motor is below the level of the anti-cavita- for prolonged periods of time (2 months or tion plate, or if the water supply is in- longer), several important procedures must sufficient, engine seizure may occur. -
Page 43: Lubrication
Seal replacement should be performed to perform a maintenance procedure, by an authorized Yamaha dealer prior to have a Yamaha dealer or other qualified use. mechanic do the work. -
Page 44: Replacement Parts
EMU28511 Replacement parts If replacement parts are necessary, use only genuine Yamaha parts or parts of equivalent design and quality. Any part of inferior quality may malfunction, and the resulting loss of control could endanger the operator and passengers. -
Page 45: Maintenance Chart 1
The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every 20 hours Item... -
Page 46: Maintenance Chart 2
Inspection or replace- switch/choke switch ment as necessary Wire harness connec- Inspection or replace- tions/wire coupler con- ment as necessary nections Fuel tank (Yamaha por- Inspection and clean- table tank) ing as necessary EMU34451 Maintenance chart 2 Every Item Actions... -
Page 47: Greasing
Maintenance EMU28943 Greasing Yamaha grease A (water resistant grease) Yamaha grease D (corrosion resistant grease; for propeller shaft) 6C, 8C ZMU02872 carburetion problem in that cylinder. Do not EMU28957 Cleaning and adjusting spark plug attempt to diagnose any problems yourself. -
Page 48: Checking Fuel Filter
For re- placement of the fuel filter, consult your Be sure to use the specified spark plug, Yamaha dealer. otherwise the engine may not operate properly. Before fitting the spark plug, measure the electrode gap with a wire thickness gauge;... -
Page 49: Inspecting Wiring And Connectors
For idle speed specifications, see page 8. If you have difficulty verifying the idle speed, or the idle speed requires ad- justment, consult a Yamaha dealer or other qualified mechanic. EMU29114 Inspecting wiring and connectors Inspect that each connector is engaged ... -
Page 50: Removing Propeller
Otherwise, EMU29289 the propeller could come off during oper- Changing gear oil ation and be lost. EWM00800 WARNING Apply Yamaha marine grease or a corro- Be sure the outboard motor is securely ... - Page 51 Never get under the lower unit while it case may be damaged. Have a is tilted, even when the tilt support lever Yamaha dealer check and repair the or knob is locked. Severe injury could outboard motor. [ECM00713] occur if the outboard motor accidental- TIP: ly falls.
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Page 52: Cleaning Fuel Tank
Inspecting and replacing anode(s) Wipe up any spilled fuel immediately. Yamaha outboard motors are protected from Reassemble the fuel tank carefully. Im- corrosion by sacrificial anodes. Inspect the proper assembly can result in a fuel external anodes periodically. - Page 53 Maintenance Yamaha dealer for inspection and replace- ment of internal anodes attached to the pow- er unit.
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Page 54: Trouble Recovery
Q. Has fuel pump malfunctioned? If your outboard motor requires repair, bring A. Have serviced by a Yamaha dealer. it to your Yamaha dealer. If the engine trouble-alert indicator is flash- Q. Are spark plug(s) fouled or of incorrect ing, consult your Yamaha dealer. - Page 55 Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Is fuel joint connection incorrect? A.
- Page 56 Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or A. Have serviced by a Yamaha dealer. other obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
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Page 57: Temporary Action In Emergency
A. Tighten bolt. er), the engine can be started with an emer- gency starter rope. Q. Is steering pivot loose or damaged? EWM02361 A. Tighten or have serviced by a Yamaha WARNING dealer. Use this procedure only for emergency ... -
Page 58: Emergency Starting Engine
Trouble Recovery Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg while operating the boat. Do not attach the cord to clothing that could tear loose. Do not route the cord where it could become entangled, pre- venting it from functioning. -
Page 59: Treatment Of Submerged Motor
EMU33501 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. NOTICE: Do not attempt to run the outboard motor until it has been com- pletely inspected. - Page 62 ×...