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General| Cylinders | 1 |
|---|---|
| Fuel Delivery | Carburetor |
| Ignition System | CDI |
| Starting System | Manual |
| Gear Ratio | 2.08:1 |
| Prop Shaft Horsepower | 6 hp |
| Full Throttle RPM Range | 4500-5500 rpm |
| Lubrication | Wet sump |
| Oil Capacity | 0.6 L |
| Displacement | 139cc |
| Shaft Length | 15 inches |
| Bore x Stroke | 62.0 x 46.0 mm |
| Fuel Tank Capacity | 1.0L (Integral) |
| Weight | 22 kg |
Introduces the manual and thanks the user for choosing Yamaha.
Explains the meaning of symbols used to highlight important information.
Defines the WARNING, NOTICE, and TIP indicators for safety and clarity.
General safety precautions for operating the outboard motor.
Warns about risks from the propeller and internal moving parts.
Covers safe handling of gasoline and carbon monoxide awareness.
Provides guidance on handling gasoline spills and exposure effects.
Warns about carbon monoxide poisoning from exhaust gases.
Essential safety precautions for boating operations.
Discusses boating under influence, PFD usage, and safety in water.
Guidelines for collision avoidance, proper loading, and passenger safety.
Advice on weather awareness and mandatory accident reporting procedures.
Recommends safety courses and advises knowing marine laws.
Explains international waterway rules for vessel encounters.
Details rules for determining right-of-way between vessels.
Defines vessel roles in right-of-way situations and general prudential rules.
Outlines three situations (meeting, crossing, overtaking) requiring specific rules.
Covers rules for channels, fishing, sailing vessels and reading buoys.
Shows where to find and record the motor's serial number.
Provides space to record identification numbers for reference.
Stresses the importance of reading all manuals and labels for safe operation.
Advises contacting the dealer for replacement of damaged or missing labels.
Explains the meaning of various warning labels found on the motor.
Defines common symbols indicating notices, warnings, and hazards.
Explains the symbol indicating an electrical hazard.
Shows locations of warning labels specific to F4 and F6 models.
Details performance, power unit type, displacement, and ignition systems.
Lists overall length, width, height, and transom heights for models.
Provides dry weight specifications for different models and shaft lengths.
Specifies recommended fuel, oil grades, and quantities for engine and gear oil.
Warns about overpowering a boat and advises checking capacity plates.
Guides for proper and safe mounting of the outboard motor.
Explains the impact of propeller choice on performance and how to select one.
Details recommended oil grades based on ambient temperature.
Specifies gasoline quality, octane, and recommendations for alcohol-free fuel.
Discusses the use of ethanol-containing gasoline and its potential effects.
Advises on fuel filters and recommends Yamalube additives.
Recommends kits for muddy water and guidance on anti-fouling paint.
Covers motor disposal and lists essential emergency equipment.
States conformity to EPA regulations and refers to engine labels.
Indicates the location of the label showing the manufacturing date.
Explains the California Air Resources Board (CARB) star label system.
Details the meaning of one, two, three, and four-star emission labels.
Illustrates and labels the parts of the F2.5 outboard motor.
Lists and numbers components shown in the F2.5 diagram.
Illustrates and labels the parts of the F4 and F6 outboard motors.
Lists and numbers components shown in the F4, F6 diagram.
Details the built-in fuel tank and its parts for the F2.5 model.
Details the built-in fuel tank and its parts for F4, F6 models.
Describes the optional portable fuel tank and its components.
Labels fuel joints, gauges, caps, and screws for portable tanks.
Explains how to turn the fuel cock on/off for different fuel tank types.
Details the closed, built-in, and portable fuel tank positions for the fuel cock.
Describes how to use the tiller handle for steering the boat.
Explains the operation of the gear shift lever for F2.5 and F4, F6 models.
Details how to use the throttle grip to control engine speed.
Explains how the throttle indicator shows engine speed and start position.
Describes adjusting throttle resistance for operator preference.
Explains the function and importance of the engine shut-off cord.
Explains how to use the engine stop button to shut off the engine.
Describes the function of the choke knob for starting the engine.
Explains the importance of installing the fuel joint cap when not using a portable tank.
Describes the use of the manual starter handle for engine starting.
Explains how to adjust steering friction for ease of control.
Details adjusting steering friction for the F2.5 model.
Explains how to use the trim rod to adjust the motor's trim angle.
Details adjusting steering friction for the F4, F6 models.
Explains the mechanism preventing the motor from lifting out of water.
Describes using the tilt support bar for tilted or shallow water positions.
Explains how to lock the tilt support lever for the F2.5 model.
Describes the function of the cowling lock lever for securing the top cowling.
Explains the use of the carrying handle for transporting the motor.
Warns against overpowering boats and improper motor mounting.
Guides for proper and safe mounting of the outboard motor.
Advises two people are needed to lift and mount the motor.
Guides on centering the motor and ensuring boat balance for steering.
Explains how to adjust steering friction and warns against overtightening.
Discusses the impact of mounting height on efficiency and cavitation.
Notes on keeping the idle hole submerged and anti-cavitation plate position.
Instructions for securing the motor to the transom with clamp screws.
Details tightening clamp screws and attaching the restraint cable for safety.
Initial steps for filling engine oil and preparing for first operation.
Explains the importance and steps for breaking in a new engine.
Lists critical checks to perform before starting the outboard motor.
Advises checking fuel levels and discusses fuel filling instructions.
Steps for removing the top cowling for checks and maintenance.
Emphasizes checking the fuel system for leaks and proper connections.
Verifies smooth operation of tiller handle and throttle grip.
Checks throttle cables, shift links, and start-in-gear protection.
Inspects the engine shut-off cord and clip for damage.
Guides on checking the engine oil level using the oil level check window.
Details checking engine oil level using a dipstick for F4, F6 models.
Advises checking engine mounting, fasteners, propeller, and oil leaks.
Steps for correctly fitting and locking the top cowling.
Details installing the top cowling, checking seals and levers for F4, F6.
Steps for filling the built-in fuel tank for the F2.5 model.
Important safety warnings related to refueling gasoline.
Steps for filling the built-in fuel tank for F4, F6 models, with warnings.
Instructions for filling the optional portable fuel tank.
Procedures for removing the tank, venting, and filling it with fuel.
Safety checks and warnings before starting the engine.
Steps to send fuel from the built-in tank to the engine.
Procedure for sending fuel from a portable tank to the engine.
Verifies engine operation after warming up.
Instructions on how to shift gears smoothly.
Verifies the proper function of engine stop and shut-off switches.
Details shifting from neutral to forward and reverse for F2.5.
Details shifting gears for F4, F6 models.
Explains how the boat stops using water resistance.
Warns against using reverse for stopping and explains boat deceleration.
Step-by-step guide to safely stop the outboard motor.
Explains how trim angle affects boat performance and handling.
Guides on adjusting trim angle using the trim rod on manual tilt models.
Explains how bow-up and bow-down trim affects boat stability and efficiency.
Describes procedures for tilting the motor up or down for protection.
Steps for tilting the outboard motor up for storage or shallow water.
Steps for tilting the outboard motor down from the tilted-up position.
Guidelines for operating the boat safely in shallow water.
Steps for setting the motor for shallow water operation.
Steps to return the motor from shallow water position to normal running.
Advises flushing after operating in salt or contaminated water.
Precautions and procedures for transporting and storing the motor.
Shows the correct attitude for transporting the motor when removed from a boat.
Instructions for dismounting and transporting F4, F6 motors.
Procedures for flushing the cooling system using a test tank.
Washing the outboard motor body with fresh water.
Recommends filling the tank with fresh fuel and stabilizer for storage.
Mentions removing the propeller for further information.
Instructions for flushing the cooling system using the optional water flush plug.
Details lubrication points and greasing procedures.
Procedures for cleaning the motor and applying protective coatings.
Steps for washing the exterior of the outboard motor.
Inspecting paint for damage that could lead to corrosion.
Warns about mechanical skills needed and safety precautions for maintenance.
Explains how operating conditions affect maintenance frequency.
Lists initial and periodic maintenance tasks and their recommended intervals.
Lists specific maintenance tasks and their intervals, especially for 1000 hours.
Illustrates the locations for greasing on the F2.5 model.
Illustrates the locations for greasing on the F4, F6 models.
Guides on inspecting, cleaning, and adjusting spark plugs.
Lists correct spark plug types and gaps for different models.
Instructions for checking and cleaning fuel filters in various locations.
Explains how to check idle speed and the need for specialized tools.
Step-by-step instructions for changing engine oil.
Specific instructions for changing engine oil on F4, F6 models.
Advises consulting a dealer for checking electrical connectors and leads.
Details how to inspect the propeller for damage, wear, and entanglement.
Steps for safely removing the propeller, nut, and washer.
Procedures for correctly installing the propeller, washer, and cotter pin.
Instructions for draining and refilling the gear oil in the lower unit.
Guidance on inspecting sacrificial anodes for corrosion protection.
Lists common causes and remedies for an engine that will not start.
Addresses problems with irregular idling or the engine stalling.
Covers issues causing reduced engine power, like propeller or height problems.
Lists causes for excessive engine vibration and their solutions.
Addresses problems with loose or damaged steering pivots.
Provides general advice for handling emergencies on the water.
Steps to take if the motor sustains damage from a collision.
What to do if the starter mechanism fails to crank the engine.
Instructions for starting the F2.5 engine using an emergency starter rope.
Safety warnings and precautions for using the emergency starter rope.
Instructions for starting the F4, F6 engine using an emergency starter rope.
Safety warnings specific to emergency starting on F4, F6 models.
Further safety advice regarding rotating flywheels and electrical components.
Immediate steps to take if the outboard motor is submerged.
Details the three-year limited warranty terms, coverage, and exclusions.
Explains eligibility for warranty and the process for obtaining repairs.
Lists general and specific parts excluded from warranty coverage.
Covers the warranty for emission control components under EPA regulations.
Information on warranty coverage when using the motor outside the US or Canada.
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