PARSUN OUTBOARD MOTOR OWNER'S MANUAL

PARSUN F25/20BM F25/20BW F25/20FW

Table of contents

• 1. Main components and General information
  • 1.1 Main components
  • 1.2 General information
    • 1.2.1 Specification
    • 1.2.2 Fueling instructions
    • 1.2.3 Propeller selection
• 2. Operation
  • 2.1 Installation
    • 2.1.1 Mounting height
    • 2.1.2 Clamping the outboard motor
  • 2.2 Breaking in engine
  • 2.3 Pre-operation checks
  • 2.4 Filling fuel
  • 2.5 Starting engine
  • 2.6 Warm up engine
  • 2.7 Shifting
    • 2.7.1 Forward
    • 2.7.2 Reverse
  • 2.8 Tiller
  • 2.9 Trim tab
  • 2.10 Stopping engine
  • 2.11 Trimming outboard motor
  • 2.12 Tilting up and down
    • 2.12.1 Tilting up
    • 2.12.2 Tilting down
  • 2.13 Cruising in other conditions
    • 2.13.1 Cruising in shallow water
    • 2.13.2 Cruising in salt water
• 3. Maintenance
  • 3.1 Greasing
  • 3.2 Cleaning and adjusting spark plug
  • 3.3 Checking the fuel system
    • 3.3.1 Cleaning the fuel filter
  • 3.4 Inspecting idling speed
  • 3.5 Changing engine oil
  • 3.6 Checking wiring and connectors
  • 3.7 Checking for leakage
  • 3.8 Checking propeller
    • 3.8.1 Removing the propeller
    • 3.8.2 Installing the propeller
  • 3.9 Changing gear oil
  • 3.10 Cleaning fuel tank
  • 3.11 Checking and replacing anode(s)
  • 3.12 Checking top cowling
  • 3.13 Maintenance table
• 4. Transporting and storing
  • 4.1 Transporting
  • 4.2 Storing
• 5. Actions in emergency
  • 5.1 Impact damage
  • 5.2 Starter will not operate
  • 5.3 Treatment of submerged motor
• 6. Troubleshooting
• 7. Circuit diagram

1. Main components and General information

1.1 Main components

• 1. Top cowling
• 2. Top cowling lock handle
• 3. Drain screw
• 4. Anti-cavitation plate
• 5. Trim tab
• 6. Propeller
• 7. Cooling water inlet
• 8. Trim rod
• 9. Clamp bracket
• 10. Steering friction bolt
• 11. Tiller handle
• 12. Starters handle
• 13. Warning indicator
• 14. Gear shift lever
• 15. Engine stop button/Engine stop lanyard switch
• 16. Throttle frication adjuster
• 17. Throttle grip
• 18. Clamp bolt
• 19. Rope attachment
• 20. Tilt lock lever
• 21. Fuel joint
• 22. Fuel tank

A portable fuel tank includes parts as follows:

• 1. Fuel tank cap 3. Air vent screw
• 2. Fuel joint 4. Fuel gauge

The fuel tank supplier with this engine could only be used as supply of fuel for it's running and must not be as a fuel storage container.

1.2 General information

1.2.1 Specification

Main technical data:

Performance:

1.2.2 Fuel instructions

Fuel instructions:

Recommended gasoline:

Regular unleaded gasoline. If it is not available, then premium gasoline.

If knocking or pinging occurs, use a different brand of gasoline or premium unleaded fuel.

If leaded gasoline is usually used, engine valve and related parts should be inspected after every 100 hours of operation.

WARNING:

• 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.
• · Do not overfill the fuel tank.
• Take care not to spill gasoline, if gasoline spills, wipe it up immediately.
• Tighten the filler cap securely after refueling.
• · If you should swallow some gasoline, inhale a lot of gasoline vapor, or get gasoline in your eye, get immediate medical attentions.
• · If any gasoline spills onto your skin, immediately wash with soap and water. Change clothing if gasoline spills on it.
• · Touch the fuel nozzle to metal components to prevent electrostatic sparks.

CAUTION:

Use only new clean gasoline which has been stored in clean containers and is not contaminated with water or foreign matter.

Engine oil:

Recommended engine oil: 4-stroke outboard motor oil SAE10W30 and SAE10W40(1.7L).

WARNING:

• · Do not start the engine when the oil level is low. Serious damage might occur.
• · Always check the oil level before starting the engine.

CAUTION:

All 4-stroke engines are shipped from the factory without engine oil.

1.2.3 Propeller selection

The performance of your outboard motor will be critically affected by your choice of propeller, as an incorrect choice could adversely affect performance. The outboard motor is fitted with propellers 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. "PARSUN"dealers stock a range of propellers and can advise you and install a propeller on your out board that is best suited to your application.

For a greater boat load and a low engine speed, a smaller-pitch propeller is more suitable. Conversely, a large-pitch propeller is more suitable for a smaller operating load as it enables the correct engine speed to be maintained.

2. Operation

2.1 Installation

Mount the outboard motor on the center line (keel line) of the boat. For boats without a keel or which are asymmetrical, consult your dealers.

1. Center line (keel line)

NOTE:

During water testing check the buoyancy of the boat, at rest, with its maximum load. Check that the static water level on the exhaust housing is low enough to prevent water entry into the power head, when water rises due to waves when the outboard is not running.

WARNING:

• · Overpowering a boat could cause severe instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat. If the boat does not have a capacity plate, consult the boat manufacturer.
• · Improper mounting of the outboard motor could result in hazardous conditions. Your dealer or other person experienced in proper rigging should mount the motor. Ifyou are mounting the motor yourself, you should be trained by an experienced person.
• · The information presented in this section is intended as reference only. Proper mounting depends in part on experience and the specific boat and motor combination.

2.1.1 Mounting height

The mounting height of the outboard motor greatly affects your boat running efficiency. If the mounting

height is too high, cavitation tends to occur, thus reducing the propulsion. If the mounting height is too low, the water resistance will increase and thereby reduce engine efficiency. Mount the outboard motor so that the anti-cavitation plate is between the bottom of the boat and a level 25mm below it.

NOTE:

The optimum mounting height of the outboard motor is affected by the boat and motorcombination and the desired use. Test runs at a different height can help determine theoptimum mounting height. For further information, consult your "PARSUN" dealer or boat manufacturer.

2.1.2 Clamping the outboard motor

1. Tighten the transom clamp screw evenly and securely. Occasionally check the clamp screws for tightness during operation of the outboard motor because they could become loose due to engine vibration.

CAUTION:

Outboards that use clamp bracket screws alone are INSUFFICIENT to properly and safely secure the outboard to the Transom. Proper installation of the outboard includes bolting the engine to the boat through the transom.

WARNING:

Loose clamp screws could allow the outboard motor to fall off or move on the transom. This could cause loss of control. Make sure the clamp screws are tightened securely,occasionally check the screws for tightness during operation.

2. If the engine restraint cable attachment is equipped on your engine, an engine restraint cable or chain should be used. Attach to a secure mounting point on the boat to avoid the engine being completely lost if it accidentally falls off the transom.

3. Secure the clamp bracket to the transom using the appropriate bolts. For details, consult your PARSUN dealer.

WARNING:

Avoid using bolts, nuts or washers inappropriate. After tightening, test running the engine and check their tightness.

2.2 Breaking in engine

Your new engine requires a period of breaking to allow mating surfaces of moving parts to wear in evenly.

CAUTION:

Failure to follow the break-in procedure could result in reduced engine life or even severe engine Damage.

1. For the first hour of operation: Run the engine at 2000 r/min or at approximately half throttle.

• 2. For the second hour of operation: Run the engine at3000 r/min or at approximately three-quarter throttle.
• 3. For the next eight hours of operation: Avoid continuous operation at full throttle for more than five minutes at a time.
  • 4. Operate the engine normally.

2.3 Pre-operation checks

Fuel:

• ·Check to be sure you have plenty of fuel for your trip.
• ·Make sure there are no fuel leaks or gasoline fumes.
• ·Check fuel line connections to be sure they are tight
• ·Be sure the fuel tank is positioned on a secure, flat surface, and that the fuel line is not twisted or flattened, or likely to contact sharp objects.

Controls:

• ·Check throttle, shift and steering for proper operation before starting the engine.
• ·The controls should work smoothly, without binding or unusual free play.
• ·Look for loose or damaged connections.
• ·Check operation of the starter and stop switches when the outboard motor is in the water.

CAUTION:

• ·Do not start the engine out of water. Overheating and serious engine damage can occur.
• ·Check the engine and engine mounting.
• ·Look for loose or damaged fasteners.
• ·Check the propeller for damage.

Checking the engine oil level:

1. Put the outboard motor in an upright position (not tilted).

2. Check the oil level using the dipstick to be sure the level falls between the upper and lower marks. Fill with oil if it is below the lower mark, or drain to the specified level if it is above the upper mark.

Oil dipstick 3. Lower level mark

2.Upper level mark

CAUTION:

Be sure to completely insert the dipstick into the dipstick guide.

2.4 Filling fuel

WARNING:

Gasoline and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames, or other sources of ignition.

• 1. Remove the fuel tank cap.
• 2. Carefully fill the fuel tank.

3. Securely close the cap after filling the tank. Wipe up any spilled fuel.

2.5 Starting engine

For F25/20BM

1. Connect fuel joints securely after loosing the air vent screw on the fuel tank cap (2 or 3 turns).

2. Connect fuel joints securely and squeeze the primer pump with the outlet end up until you feel it become firm (if equipped the fuel joint).

3. Place the gear shift lever in neutral.

NOTE:

The start-in-gear protection device prevents the engine from starting except when in neutral. Attach the engine stop switch lanyard to secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the engine stopswitch.

WARNING:

• · The engine must be starting in neutral otherwise damage starter and hazard can occur.
• · Do not attach the lanyard to clothing that could tear loose. Do not route the lanyard where it

could become entangled and preventing it from functioning

· Avoid accidentally pulling the lanyard during normal operation. Loss of engine power means the loss of steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.

4. Place the throttle grip in the "START" (start) position.

5. Pull the manual starter handle slowly until you feel resistance. Then give a strong pull straight to crank and start the engine. Repeat if necessary.

• 6. After the engine starts, slowly return the manual starter handle to its original position before releasing it.
• 7. Slowly return the throttle grip to the fully closed position.

CAUTION:

• · When the engine is cold, it needs to be warmed up.
• · If the engine does not start on the first try, repeat the procedure. If the engine fails to start after 4 or 5 tries, open the throttle a small amount (between 1/8 and 1/4), and try again.

For F25/20BW

1. Connect fuel joints securely after loosing the air vent screw on the fuel tank cap(2 or 3 turns).

2. Connect fuel joints securely and squeeze the primer pump with the outlet end up until you feel it become firm(if equipped the fuel joint).

3. Place the remote control lever in neutral.

NOTE:

The start-in-gear protection device prevents the engine from starting except when in neutral. Attach the engine stop switch lanyard to secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the engine stop switch.

WARNING:

• The engine must be starting in neutral otherwise damage starter and hazard can occur.
• Do not attach the lanyard to clothing that could tear loose.Do not route the lanyard where it could become entangled and preventing it functioning.
• Avoid accidentally pulling the lanyard during normal operation. Loss of engine power means the loss of steering control.Also, without engine power,the boat could slow rapidly.This could cause people and objects in the boat to be thrown forward.

4. Place the throttle grip in the "START"(start)position. Turn the main switch to "ON"(on).

5.Turn the main switch to "START"(start), and hold it for a maximum or 5 seconds.

• 6.After the engine starts, slowly return the manual starter handle to its original position before releasing it. Immediately after the engine starts,release the main switch and allow it to return to "ON"(on).
• 7.Slowly return the throttle grip to the fully closed position.

NOTE:

• Never turn the main switch to "START"(start)while the engine is running.
• Do not keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be quickly discharged,thus

making it impossible to start the engine. The starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to "ON"(on), wait 10 seconds,then crank the engine again.

NOTE:

• When the engine is cold, it needs to be warmed up.
• If engine does not start on the first try, repeat the procedure. If the engine fails to start after 4 or 5 tries,open the throttle a small amout (between 1/8 and 1/4), and try again.

For F25/20FW

1. Connect fuel joints securely after loosing the air vent screw on the fuel tank cap (2 or 3 turns).

2. Connect fuel joints securely and squeeze the primer pump with the outlet end up until you feel it becomes firm (if equipped with a fuel joint).

3. Place the remote control lever in neutral.

NOTE:

The start-in-gear protection device prevents the engine from starting except when in neutral.

4. 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 end of the lanyard into the engine stop switch.

WARNING:

• Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg
• Do not attach the lanyard to clothing that could tear loose. Do not route the lanyard where it could become entangled and preventing it from functioning.
• Avoid accidentally pulling the lanyard during normal operation. Loss of engine power means the loss of steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.

5. Turn the main switch to "ON" (on).

NOTE:

• It is not necessary to use the choke when starting a warm engine.
• If the choke is left the home position while the engine is running, the engine will run poorly or stall.
• 6. Turn the main switch to "START" (start), and hold it for a maximum or 5 seconds.

7. Immediately after the engine starts, release the main switch and allow it to return to "ON"(on).

CAUTION:

• Never turn the main switch to "START"(start) while the engine is running.
• Do not keep the starter motor turning for more than 5 seconds If the starter motor is turned continuously for more than 5 seconds , the battery will be quickly discharged, thus making it impossible to start the engine. The starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to "ON"(on), wait 10 seconds, then crank the engine again.

NOTE:

When the engine is cold, it needs to be warmed up.

2.6 Warm up engine

• 1. After starting the engine, place the gear shift lever in neutral. For approximately the first 3 minutes after starting, warm up the engine by operating at one fifth throttle or less. Otherwise, will shorten engine life.
• 2. Check for steady flow of water from the cooling water pilot hole.

CAUTION:

• · If water is not flowing out of the hole at all times while the engine is running, stop the engine and check whether the cooling water inlet on the lower case or the cooling water pilot hole is blocked.
• · If the problem cannot be located and corrected, consult your PARSUN dealer.

2.7 Shifting

WARNING:

Before shifting, make sure there are no swimmers or obstacles in the water near you.

CAUTION:

To shift from forward to reverse or vice versa, first close the throttle so that the engine idles (or runs at low speeds).

2.7.1 Forward

1. Place the throttle grip in the fully closed position.

2. Move the gear shift lever quickly and firmly from neutral to forward.

For F25/20FW

Pull up the neutral interlock rigger and move the remote control lever quickly and firmly from neutral to forward.

2.7.2 Reverse

WARNING:

When operating in reverse, go slowly. Do not open the throttle more than half. Otherwise the boat could become unstable, which could result in loss of control and an accident.

1. Place the throttle trip in the fully closed position.

2. Move the gear shift lever quickly and firmly from neutral to reverse.

For F25/20FW

WARNING:

When operating in reverse, go slowly. Do not open the throttle more than half. Otherwise the boat could become unstable, which could result in loss of control and an accident.

1. Check that the tilt lock lever is in the lock position.

2. Pull up the neutral interlock rigger and move the remote control lever quickly and firmly from neutral to reverse.

2.8 Tiller

For F25/20BM &F25/20BW

1. Change direction To change direction, move the tiller handle to the left or right as necessary.

2. Change speed

Turn the grip counterclockwise to increase speed and clockwise to decrease speed.

3. Throttle indicator

The throttle indicator is on the throttle grip. The fuel consumption curve on the throttle indicator shows the relative amount of fuel consumed for each throttle position. Choose the setting that offers the best performance and fuel economy for the desired operation.

1. Throttle indicator

4. Throttle friction adjuster

The throttle friction adjuster is on the tiller handle, which provides adjustable resistance to movement of the throttle grip, and can be set according to operator preference.

To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster

counterclockwise. When constant speed is desired, tighten the adjuster to maintain the desired throttle setting.

WARNING:

Do not over-tighten the friction adjuster. If there is too much resistance, it could be difficult to move throttle lever or grip, which could result in an accident.

2.9 Trim tab

The trim tab should be adjusted so that the steering control can turned to either the right or left by applying same amount of force.

WARNING:

• An improperly adjusted trim tab could cause difficult steering. Always test run after the trim tab has been installed or replaced to be sure steering is correct.
• Be sure you have tightened the bolt.

If the boat tends to veer the left, turn the trim tab to the port side. If the boat tends to veer the right, turn the trim tab to the starboard side.

2.10 Stopping engine

For F25/20BM & F25/20BW

NOTE:

Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stopping the engine immediately after operating at high speed is not recommended.

1. Push and hold the engine stop button until the engine comes to a complete stop.

NOTE:

If the outboard motor is equipped with an engine stop switch lanyard, the engine can also be stopped by pulling the lanyard and removing the lock plate from the engine stop switch.

2. Tighten the air vent screw on the fuel tank cap.

3. Disconnect the fuel line.

For F25/20FW

1. Turn the main switch to "OFF" (off).

2. Tighten the air vent screw on the fuel tank cap.

3. Disconnect the fuel line.

2.11 Trimming outboard motor

There are 4 or 5 holes provided in the clamp bracket to adjust the outboard motor trim angle.

• 1. Stop the engine.
• 2. Remove the trim rod from the clamp bracket while slightly tilting the outboard motor up.

3. Reposition the rod in the desired hole. Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions.

WARNING:

• Stop the engine before adjusting the trim angle. Use care to avoid being pinched when removing or installing the rod.
• Use caution when trying a trim position for the first time. Increase speed gradually and watch for any signs of instability or control problems. Improper trim angle can cause loss of control.

2.12 Tilting up and down

If the engine will be stopped for some time or if the boat is moored in shallows, the outboard motor should be tilted up to protect the propeller and casing from damaged by collision with obstructions, and also to reduce corrosion.

WARNING:

Be sure all people are clear of the outboard motor when tilting up and down, also be careful not to pinch any body parts between the drive unit and engine bracket.

NOTE:

Do not tilt up the engine by pushing the tiller handle because this could break the handle. The outboard motor cannot be tilted when in reverse.

2.12.1 Tilting up

For F25/20BM & F25/20BW

1. Place the gear shift lever in neutral (if equipped).

2. Tighten the steering friction adjuster by turning it clockwise to prevent the motor from turning freely.

3.Disconnect the fuel line from the outboard motor.

4. Place the tilt lock lever (if equipped) in the up position.

5. Hold the rear handle and tilt the engine up fully until the tilt support lever automatically locks.

For F25/20FW

1. Place the remoter control lever in neutral (if equipped).

2. Disconnect the fuel line from the outboard motor.

3. Place the tilt lock lever(if equipped) in the up position.

4. Hold the rear handle and tilt the engine up fully until the tilt support lever automatically locks.

2.12.2 Tilting down

For F25/20BM & F25/20BW

• 1. Slightly tilt the outboard motor up.
• 2. Slowly tilt the outboard motor down while place the tilt lock lever in the down position.

3. Loose the steering friction adjuster by turning it counterclockwise, and adjust the steering friction according to operator preference.

WARNING:

If there is too much resistance it could be difficult to steer, which could result in an accident.

For F25/20FW

1. Place the tilt lock lever in the lock position.

• 2. Slightly tilt the engine up until the tilt support bar is automatically released.
• 3. Slightly tilt the engine up until the tilt support bar is automatically released

2.13 Cruising in other conditions

2.13.1 Cruising in shallow water

The outboard motor can be tilted up partially to allow operation in shallow water.

WARNING:

Be sure to place the gear shift in neutral before cruising in shallow water or while tilting up the outboard motor.

• Return the outboard motor to its normal position as soon as the boat is back in deeper water. CAUTION:

The cooling water inlet on the lower unit should be not above the surface of the water when setting up for and cruising in shallow water. Otherwise severe damage from overheating can result. For tilting procedure, see section 2.12.

2.13.2 Cruising in salt water

After operating in salt water, wash out the cooling water passages with fresh water to prevent them from becoming clogged with salt deposits.

3. Maintenance

While using the outboard motor, the periodic maintenance is necessary for you to ensure its performance.

WARNING:

• Be sure to turn off the engine when you perform maintenance unless otherwise specified.
• If you or the owner is not familiar with machine servicing, this work should be done by your PARSUN dealer or other qualified mechanic.

CAUTION:

If replacement parts are necessary, use only genuine PARSUN parts or parts of the same type and of equivalent strength and materials.

3.1 Greasing

3.2 Cleaning and adjusting spark plug

You should periodically remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode. If necessary, you should replace the spark plug with another of the correct type.

Before fitting the spark plug, measure the electrode gap with a wire thickness gauge; adjust the gap to specification if necessary.

When fitting the plug, always clean the gasket surface and use a new gasket. Wipe off any dirt from the threads and screw in the spark plug to the correct torque.

3.3 Checking the fuel system

1. Check the fuel lines for leaks, crack, or malfunction. If a problem is found, your PARSUN dealer or other qualified mechanic should repair it immediately.

WARNING:

• Check for fuel leakage regularly.
• If any fuel leakage is found, the fuel system must be repaired by a qualified mechanic.

2. Check the fuel filter periodically. If foreign matter is found in the filter, clean it.

3.3.1 Cleaning the fuel filter

1. Removing the nut holding the fuel filter assembly if equipped.

• 2. Unscrew the filter cup, catching any 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 of the filter cup to make sure they are in good conditions. Change them if necessary. If any water is found in the fuel, check and clean the portable fuel tanks shouldbe checked and cleaned.

• 1. Filter cup 2. O-ring 3.Filter element 4. Filter housing
• 4. Reinstall the filter element in the cup. Make sure the O-ring is in position in the cup. Firmly screw the cup onto the filter housing.
• 5. Attach the filter assembly to the bracket so that the fuel hoses are attached to the filter assembly. Run the engine and check the filter and lines for leaks.

3.4 Inspecting idling speed

A diagnostic tachometer should be used for this procedure. Results may vary depending on whether testing is conducted with the flushing attachment, in a test tank, or with the outboard motor in the water.

• 1. Start the engine and allow it to warm up fully in neutral until it is running smoothly.
• 2. Verify whether the idle speed is set to specification. Idle speed:975±50Rpm

CAUTION:

Correct idling speed inspection is only possible if the engine is fully warmed up. If not warmed up fully, the idle speed will measure higher than normal. If you have difficultyverifying the idle speed, or the idle speed requires adjustment, consult a PARSUN dealer or other qualified mechanic.

3.5 Changing engine oil

WARNING:

• Avoid draining the engine oil immediately after stopping the engine. The oil is hot andshould be handled with care to avoid burns.
• Be sure the outboard motor is securely fastened to the transom or a stable stand.

CAUTION:

Change the engine oil after the first 10 hours of operation, and every 100 hours or at 6-month intervals thereafter. Otherwise the engine will wear quickly. Change the engine oil when the oil is still warm.

1. Put the outboard motor in an upright position (not tilted).

2. Prepare a suitable container that holds a larger amount than the engine oil capacity. Loosen and remove the drain screw while holding the container under the drain hole. Then remove the oil filler cap. Let oil drain completely. Wipe up any spilled oil immediately.

• 3. Put a new gasket on the oil drain screw. Tighten the drain screw.
• 4. Add the correct amount of oil through the filler hole. Install the filler cap.
• 5. Start the engine and make sure that there are no oil leaks.
• 6. Turn off the engine and wait 3 minutes. Recheck the oil level using the dipstick to be sure the level falls between the upper and lower marks.

CAUTION:

The oil should be changed more often when the engine is operated under adverseconditions such as extended trolling.

3.6 Checking wiring and connectors

Check that each grounding wire is properly secured and each connector is engaged securely.

3.7 Checking for leakage

Check that no exhaust or water leaks from the joints between the exhaust cover, cylinder head, and body cylinder. Check for oil leaks on the around the engine.

CAUTION:

If any leaks are found, consult your PARSUN dealer.

3.8 Checking propeller

WARNING:

• Before inspecting, removing or installing the propeller, always take actions to ensure the engine will not accidentally starts, such as removing the spark plug caps from the spark plugs, placing the shift control in neutral, and removing the lanyard from the engine stop switch, etc. Serious accident could occur if the engine starts when you are nearby.
• Do not use your hand to hold the propeller when loosening or tightening the propeller nut. Put a wood block between the anti-cavitation plate and the propeller to prevent the propeller from turning.

• 1. Check each of the propeller blades for wear, erosion from cavitation or ventilation, or other damage.
• 2. Check the propeller shaft for damage.
• 3. Check the splines' shear pin for wear or damage.
• 4. Check for fish line tangled around the propeller shaft.
• 5. Check for the propeller shaft oil seal for damage.

3.8.1 Removing the propeller

• 1. Straighten the cotter pin and pull it out using a pair of pliers.
• 2. Remove the propeller nut, washer, and spacer (if equipped).
• 3. Remove the propeller and thrust washer.

3.8.2 Installing the propeller

CAUTION:

• Be sure to install the thrust washer before instating 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 operation and be lost.
• 1. Apply a marine grease or corrosion resistant grease to the propeller shaft.
• 2. Install the spacer (if equipped), thrust washer, and propeller on the propeller shaft.
• 3. Install the spacer (if equipped) and the washer.
• 4. Tighten the propeller nut. Align the propeller nut with the propeller shaft hole. Insert a new cotter pin in the hole and bend the cotter pin ends.

3.9 Changing gear oil

WARNING:

• Be sure the outboard motor is securely fastened to the transom or a stable stand.
• Never get under the lower unit while the outboard motor is tilted, even when the tilt support lever or knob is locked. Serious injury could occur if the motor falls.
• 1. Tilt the outboard motor so that the gear oil drain screw is at the lowest point possible.
• 2. Place a suitable container under the gear case.
• 3. Remove gear oil drain screw.
• 1.Gear oil drain screw
• 2.Oil level plug

CAUTION:

Change the gear oil after the first 10 hours of operation, and every 100 hours or at 6-month intervals thereafter. Otherwise the gear will wear quickly.

4. Remove the oil level plug to allow the oil to drain completely.

CAUTION:

Inspect the used oil after it has been drained. If the oil is milky, water is getting into thegear case which can cause gear damage. Consult PARSUN dealer.

• 5. Use a flexible or pressurized filling device, inject the gear oil into the gear oil drain screw hole.(320cm³)
• 6. When the oil begins to flow out of the oil level plug hole, insert and tighten the oil level plug (If necessary, change the seal spacer).
• 7. Insert and tighten the gear oil drain screw (If necessary, change the seal spacer).

3.10 Cleaning fuel tank

WARNING:

• Keep away from sparks, cigarettes, flames, or other sources of ignition when cleaning thefuel tank.
• Cleaning the fuel tank in a well-ventilated open air.
• 1. Empty the fuel tank into an approved container.
• 2. Pour a small amount of suitable solvent into the tank. Install the cap and shake the tank. Drain the solvent completely.
• 3. Pull the fuel joint assembly out of the tank.
• 4. Clean the filter in a suitable cleaning solvent and allow it to dry.
• 5. Replace the gasket with a new one. Reinstall the fuel joint assembly and tighten the screws firmly.

3.11 Checking and replacing anode(s)

Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a PARSUN dealer for replacement of external anodes.

CAUTION:

Do not paint anodes, as this would render them ineffective and can cause more rapid engine corrosion.

3.12 Checking top cowling

Check the fitting of the top cowling by pushing it with both hands. If it is loose have it repaired by your PARSUN dealer.

3.13 Maintenance table

When utilized under normal condition, maintained and repaired in the proper manner, the motor can work normally within the normal life period.

Frequency of maintenance operations may be adjusted according to the operating conditions, but the following table gives general guidelines.

The "●" symbol indicates the check-ups which you may carry out by yourself.

The "○" symbol indicates work to be carried out by your Parsun dealer.

NOTE:

When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after every use.

4. Transporting and storing

4.1 Transporting

The outboard motor should be trailed and stored in the normal running position. If there is insufficient road clearance in this position, then trailer the outboard motor in the tilt position using a motor support device.

CAUTION:

Do not use the tilt support lever or knob when trailering the boat. The outboard motorcould shake loose from the tilt support and fall.

WARNING:

• · Never get under the lower unit while it is tilted, even if a motor support bar is used.
• · When transporting or storing the outboard motor while removed from a boat, keep the outboard motor in the attitude shown.

CAUTION:

• · Place a towel or something similar under the outboard motor to protect it from damage.
• · Do not place the outboard motor on its side (not upright) before drain the engine oil completely, otherwise the oil would enter the cylinder and cause engine trouble.

4.2 Storing

When storing your PARSUN outboard motor for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage.

It is advisable to have your outboard motor serviced by an authorized PARSUN dealer prior to storage. However, you, the owner, with a minimum of tools, can perform the following procedures.

CAUTION:

• Keep the outboard motor in an upright attitude when transporting and storing it. If storing or transporting the outboard motor on its side (not upright), put it on a cushionafter draining the engine oil completely.
• Do not place the outboard motor on its side before the cooling water has drained from it completely.
• Store the outboard motor in a dry, well-ventilated place, not in direct sunlight.
• 1. Wash the outboard motor body using fresh water.
• 2. Disconnect the fuel line and tighten the air vent screw,
• 3. Remove the engine top cowling and silencer cover
• 4. Install the outboard motor on the test tank.
  • 1. Lowest water level
  • 2. Water surface

5. Fill the tank with fresh water to above the level of the anti-cavitation plate.

CAUTION:

If the fresh water level is below the level of the anti-cavitation plate, or if the water supply Is insufficient, engine seizure may occur.

6. Start the engine. Flush the cooling system. Perform the flushing and fogging at the same time, as fogging/lubricating of the engine is mandatory to prevent engine rust.

WARNING:

• Do not touch or remove electric parts when starting or during the operation.
• Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running.
• 7. Run the engine at a fast idle for a few minutes in neutral position.
• 8. Just prior to turning off the engine, quickly spray "Fogging Oil" alternately into each carburetor or the fogging hole of the silencer cover, if equipped.
• 9. If "Fogging Oil" is not available, run the engine at a fast idle until the fuel system empties and the engine stops.
• 10. If "Fogging Oil" is not available, remove the spark plug(s). Pour a teaspoonful of clean engine oil into each cylinder. Crank several times manually. Replace the spark plug(s).
• 11. Drain the fuel from the fuel tank completely.

CAUTION:

Store the fuel tank in a dry, well-ventilated place, not in direct sunlight.

5. Actions in emergency

5.1 Impact damage

If the outboard motor hits an object in the water, follow the procedure below.

• 1. Stop the engine immediately.
• 2. Inspect the control system and all components for damage.
• 3. Whether damage is found or not, return to the nearest harbor slowly and carefully.
• 4. Have a PARSUN dealer inspect the outboard motor before operating it again.

5.2 Starter will not operate

If the starter mechanism does not operate, the engine can be started with an emergency starter rope.

WARNING:

• Use this procedure only in an emergency and only to return to port for repairs.
• When the emergency starter rope is used to start the engine, the start-in-gear protection device does not operate. Make sure the remote control lever is in neutral.
• Be sure no one is standing behind you when pulling the starter rope. It could whip behind you and injure someone.
• Do not install the starter mechanism or top cowling after engine is running. Keep loose clothing and other objects away when starting the engine. Do not touch the flywheel or o ther moving parts when the engine is running.
• Do not touch the ignition coil, spark plug wire, spark plug cap, or other electric components when starting or operating the motor.

Procedure is as follows:

1. Remove the top cowling.
2. Remove the start-in-gear protection cable and the choke cable.

1. Start-in-gear protection cable
2. Remove the starter cover after removing the three bolts. Disconnect the leads for the warning indicator

• 4. Prepare the engine for starting. For further information, see section 2.5.
• 5. Insert the knotted end of the emergency starter rope into the notch in the flywheel rotor and wind the rope several turns around the flywheel clockwise.

6. Pull the rope slowly until resistance is felt.

7.Give a strong pull straight out to crank and start the engine. Repeat it necessary.

5.3 Treatment of submerged motor

If the outboard is submerged, immediately take it to a PARSUN dealer. Otherwise some corrosion may begin almost immediately.

• 1. Thoroughly wash away contaminants with fresh water.
• 2. Remove the spark plug(s), then face the spark plug hole downward to allow any mud, or contaminants to drain.
• 3. Drain the fuel from the carburetor, fuel filter, and fuel line. Drain the engine oil completely.
• 4. Fill the sump with fresh engine oil.
• 5. Feed engine fogging oil or engine oil through the carburetor(s) and spark plug holes while starting the engine.
• 6. Take the outboard motor to a PARSUN dealer as soon as possible.

CAUTION:

Do not attempt to run the outboard motor until it has been completely inspected.

6. Troubleshooting

7. Circuit diagram

| R | red | Y/R | yellow/red | | Y | yellow | O | orange | | L | blue | R/W | red/white | | G | green | B | black | | Br | brown | W | white |

F25/20BW