Petrol Chainsaw

This article explains how to safely prepare and start your petrol chainsaw.

⚠️ Safety Notice

Always test the chain brake before use and periodically during operation.

Before starting the chainsaw:

• Ensure the chain is correctly tensioned.
• Check that the chain brake is functioning correctly.
• Make sure the guide bar and chain are in good condition.
• Ensure the cutting blade is pointing away from your body at all times, as the chain may move when the engine starts.

Do not use the chainsaw if the chain brake does not operate correctly.

Testing the Chain Brake

1. Push the brake lever forward until you hear an audible click.
2. The chain brake is now engaged and the chain should not move by hand.
3. Pull the brake lever backwards until it clicks into position.
4. The chain brake is now disengaged and the chain should move freely by hand.

If the brake lever does not click securely into both positions, do not use the chainsaw and contact our Technical Support Team.

Starting the Chainsaw

1. Engage the chain brake by pushing the brake lever forward until it clicks.
2. Move the switch to the START position.
3. Press and release the primer bulb 10 times until it is approximately three-quarters full of fuel.
4. Pull the choke control out to engage the choke.
5. Place the chainsaw securely on the ground.
6. Pull the starter handle four times. The engine may not start at this stage.
7. Push the choke control back in to disengage it.
8. Pull the starter handle using smooth, controlled pulls up to five times until the engine starts.
9. Allow the chainsaw to idle and warm up for approximately 30 seconds.
10. Disengage the chain brake by pulling the brake lever backwards before cutting.

Warm Restart Procedure

If restarting the chainsaw shortly after it has been running and the engine is still warm, it is usually not necessary to use the choke.

If the Issue Persists

If the chainsaw does not start after following the procedure above, please contact our Technical Support Team for further assistance.

✔️ Summary

• Test the chain brake before use
• Check chain tension and condition
• Prime the fuel system using the primer bulb
• Use the choke for cold starts only
• Allow the engine to warm up before use

This article provides a guide and video guide on how to mix fuel

Video Guide

This video explains how to assemble, prepare, and start your chainsaw correctly:

⚠️ Safety Notice

Ensure the chainsaw is switched off before carrying out any inspection or maintenance.

Do not smoke or work near naked flames when handling fuel.

Fuel Age and Fuel Mix Check

Incorrect or old fuel is one of the most common causes of engine performance issues.

Check the Fuel Age

• Ensure you are using fresh unleaded petrol that is less than 30 days old.
• Fuel that has been stored for longer periods can deteriorate and affect engine performance.
• If the fuel is older than 30 days, drain the fuel tank safely and replace it with a fresh fuel mixture.

Check the Fuel-to-Oil Ratio

• Ensure you are using the correct fuel mixture of 40:1.
• This equates to:
  • 1000ml (1 litre) of unleaded petrol
  • 25ml of 2-stroke engine oil

Using an incorrect fuel mixture may cause starting problems, poor performance, or engine damage.

1. Pull the starter cord to start the engine.
2. Disengage the chain brake
3. Ready to use

This article explains the basic checks to carry out if your petrol chainsaw engine is revving unusually high or running faster than expected.

⚠️ Safety Notice

If the engine is running at excessively high speed, stop using the chainsaw and carry out the checks below before continuing operation.

Ensure the chain brake is engaged and the chainsaw is in a safe location before inspection.

Possible Causes & Basic Checks

Check the Throttle Cable

• Inspect the throttle cable for any signs of damage.
• Ensure the cable is not kinked, trapped, or obstructed.
• A damaged or restricted cable may prevent the throttle from returning correctly.

Check the Choke Position

• Ensure the choke has been fully disengaged after starting.
• Operating with the choke engaged can affect engine performance.

Reset the Throttle Hold

• Press and release the throttle trigger to ensure the throttle hold function has reset correctly.
• This allows the throttle to return to its normal operating position.

Check the Trigger Cable Guide

• Ensure the trigger cable guide is correctly seated in its recess where it exits the handle.
• If the cable guide is not positioned correctly, it may interfere with normal throttle operation.

If the Issue Persists

If the engine continues to run at excessive speed after completing the checks above, please stop using the chainsaw and contact our Technical Support Team for further assistance.

✔️ Summary

• Check the throttle cable for damage or kinks
• Ensure the choke is fully disengaged
• Reset the throttle hold by pressing the trigger
• Check the trigger cable guide is correctly seated

This article explains the checks you can carry out if your chainsaw cuts out when the throttle trigger is released or will not maintain idle speed.

⚠️ Safety Notice

Ensure the chainsaw is operated in a safe, well-ventilated area when carrying out any running checks.

If you are unsure about adjusting the carburettor, please contact our Technical Support Team for assistance.

Possible Causes & Basic Checks

Check the Fuel

• Ensure the fuel is fresh and correctly mixed.
• Old fuel or an incorrect fuel-to-oil ratio can affect idle performance.

Check the Air Filter

• Inspect the air filter and ensure it is clean and free from debris.
• A blocked air filter can restrict airflow and cause poor engine performance.

Check the Fuel Cap

• Ensure the fuel cap is fitted correctly and tightened by hand.
• The cap should be secure, but not overtightened.

Check the Carburettor Settings

If the checks above do not resolve the issue, the carburettor may require adjustment.

Carburettor Adjustment

⚠️ This procedure requires mechanical knowledge and the correct adjustment tool. Incorrect adjustments can affect engine performance and may cause further issues.

Tools Required

• Carburettor adjustment tool

Procedure

1. Start the chainsaw and allow it to warm up fully.
2. Locate the carburettor adjustment screws:
   • L = Low speed adjustment
   • H = High speed adjustment
3. Adjust the L screw until the engine idles smoothly without the chain rotating.
4. To adjust the H screw, run the chainsaw at full throttle.
5. Turn the H screw anti-clockwise until the engine struggles to reach maximum speed.
6. Slowly turn the H screw clockwise until the engine returns to normal operating speed.

If You Are Unable to Complete This Procedure

If you are not confident carrying out carburettor adjustments, please contact our Technical Support Team for assistance.

Depending on the fault, a replacement carburettor may be required. If your product is still within its warranty period, repair options may be available.

✔️ Summary

• Check fuel freshness and mixture ratio
• Clean and inspect the air filter
• Ensure the fuel cap is correctly fitted
• Check carburettor settings

This article explains the checks you can carry out if your petrol chainsaw starts but does not reach full operating speed.

⚠️ Safety Notice

Ensure the chainsaw is operated in a safe, well-ventilated area when carrying out any running checks.

If you are unsure about adjusting the carburettor, please contact our Technical Support Team for assistance.

Possible Causes & Basic Checks

Check the Fuel

• Ensure the fuel is fresh and correctly mixed.
• Old fuel or an incorrect fuel-to-oil ratio can affect engine performance.

Check the Air Filter

• Inspect the air filter and ensure it is clean and free from debris.
• A blocked air filter can restrict airflow and reduce engine speed.

Check the Fuel Cap

• Ensure the fuel cap is fitted correctly and tightened by hand.

Check the Chain Brake

• Ensure the chain brake is fully disengaged before attempting to use the chainsaw.
• If the chain brake is engaged, the chain will not operate correctly.

Check the Carburettor Settings

If the checks above do not resolve the issue, the carburettor may require adjustment.

Carburettor Adjustment

⚠️ This procedure requires mechanical knowledge and the correct adjustment tool. Incorrect adjustments can affect engine performance and may cause further issues.

Tools Required

• Carburettor adjustment tool

Procedure

1. Start the chainsaw and allow it to warm up fully.
2. Locate the carburettor adjustment screws:
   • L = Low speed adjustment
   • H = High speed adjustment
3. Adjust the L screw until the engine idles smoothly without the chain rotating.
4. To adjust the H screw, run the chainsaw at full throttle.
5. Turn the H screw anti-clockwise until the engine struggles to reach maximum speed.
6. Slowly turn the H screw clockwise until the engine returns to normal operating speed.

If You Are Unable to Complete This Procedure

If you are not confident carrying out carburettor adjustments, please contact our Technical Support Team for assistance.

Depending on the fault, a replacement carburettor may be required. If your product is still within its warranty period, repair options may be available.

✔️ Summary

• Check fuel freshness and mixture ratio
• Clean and inspect the air filter
• Ensure the fuel cap is correctly fitted
• Confirm the chain brake is disengaged
• Check carburettor settings

This article explains the checks you can carry out if the engine runs but the chain does not move when the throttle is applied.

⚠️ Safety Notice

Ensure the chainsaw is switched off before carrying out any inspection or maintenance.

Wear suitable protective gloves when handling the chain.

Possible Causes & Basic Checks

Check the Chain Brake

The most common cause of a stationary chain is an engaged chain brake.

• Pull the chain brake lever backwards towards the front handle to disengage the chain brake.
• When disengaged, the chain should be able to move freely.
• If the chain brake is pushed forwards, the chain will be locked and unable to rotate.

Check the Chain Tension

• Ensure the chain is correctly tensioned.
• When properly adjusted, you should be able to pull a chain link slightly away from the guide bar while the drive links remain engaged in the guide groove.
• A chain that is too tight or too loose can affect operation.

Check the Chain and Guide Bar

• Inspect the chain and guide bar for signs of wear or damage.
• If either component is damaged, it should be replaced before further use.

Chain Tension Information

Chain tension will vary depending on operating temperature:

• A cold chain may appear slightly looser before use.
• As the chain warms during operation, it will expand and require periodic tension checks.
• Always adjust the chain according to the instructions in your owner's manual.

If the Issue Persists

If the chain still does not move after completing the checks above, please contact our Technical Support Team for further assistance.

✔️ Summary

• Ensure the chain brake is disengaged
• Check the chain is correctly tensioned
• Inspect the chain and guide bar for damage
• Monitor chain tension as the chain warms up

This article explains the basic checks to carry out if your petrol chainsaw is not oiling the chain correctly.

⚠️ Safety Notice

Ensure the chainsaw is switched off before carrying out any inspection or maintenance.

Do not operate the chainsaw without chain oil, as this can cause serious damage to the chain and guide bar.

Important Oil Information

Your chainsaw is designed to use a lightweight chain oil.

• Oils labelled as “anti-fling” or “extra-tacky” may be too thick, especially in colder conditions, and may not flow correctly.
• Suitable alternatives include SAE30 oil, or automotive oils such as 5W30 or 10W30.

Basic Checks

• Ensure you are using proper chain lubricating oil.
• Refill the chain oil reservoir each time you refuel the chainsaw.
• Check that the oiling port is not blocked or clogged.
• Inspect for any visible oil leaks.

Checking Chain Oil Flow

To confirm whether oil is being delivered to the chain:

1. Start the chainsaw.
2. Run the chain at a medium speed.
3. Hold the chainsaw at an angle towards the ground.
4. You should see oil being ejected and a light trace left on the surface.

Adjusting Oil Flow

On some models, oil flow can be adjusted:

1. Switch off the chainsaw.
2. Locate the oil adjustment point on the underside or side of the machine near the clutch.
3. Use a screwdriver to increase or decrease the oil flow setting.
4. Restart the chainsaw and recheck oil delivery.

Important Notes

• The oil reservoir should nearly empty at the same rate as the fuel tank during normal use.
• Always refill the oil reservoir whenever you refuel the chainsaw.

If the Issue Persists

If no oil is being delivered at all after completing the checks above, there may be a blockage or fault in the oil delivery system. In this case, please contact our Technical Support Team for further assistance.

✔️ Summary

• Use correct chain oil (avoid overly thick oils)
• Refill oil tank with every fuel refill
• Check oil ports for blockages or leaks
• Test oil flow at medium speed
• Adjust oil flow if applicable

This article explains what to do if the pull cord on your petrol chainsaw is not retracting or has become stuck.

⚠️ Safety Notice

Ensure the chainsaw is switched off and placed in a safe position before carrying out any inspection.

Do not attempt to force the pull cord mechanism, as this may cause further damage.

Possible Causes

Damaged or Snapped Pull Cord

• If the pull cord has snapped or will not retract, the starter mechanism is likely faulty.
• In most cases, the complete starter assembly will need to be replaced.

Faulty Starter Mechanism

• If the starter assembly does not engage or turn the flywheel, the issue may be with the starter pawls.
• Starter pawls should typically be replaced as a matched pair.

Recommended Action

• Do not continue to use the chainsaw if the starter system is damaged.
• Contact our Technical Support Team to arrange a replacement starter assembly or further assistance.

✔️ Summary

• Pull cord not retracting usually indicates starter failure
• Starter assembly will likely need replacing
• Starter pawls may also be faulty and require replacement

This article explains what to do if the ignition start/stop switch does not turn off your petrol chainsaw.

⚠️ Safety Notice

If the chainsaw does not stop using the ignition switch, treat this as a safety-critical issue.

Do not continue to operate the chainsaw until the fault has been resolved.

How to Stop the Chainsaw in an Emergency

If the ignition switch does not stop the engine:

• Pull the choke control fully out to stall the engine.
• Engage the chain brake immediately to stop the chain from moving.

These actions should only be used as an emergency stopping method.

Possible Causes & Basic Checks

Check the Start/Stop Switch Wiring

• Inspect the wiring connected to the start/stop switch.
• Ensure all wires are securely connected and not loose or damaged.
• Poor or disconnected wiring may prevent the switch from stopping the engine.

Important Information

• If the switch does not stop the chainsaw when set to the STOP position, it must be repaired before further use.
• Do not attempt to use the chainsaw again until the fault has been fixed.

If the Issue Persists

If the ignition switch is not functioning correctly, please contact our Technical Support Team for further assistance or repair options.

✔️ Summary

• Use choke and chain brake only in an emergency stop situation
• Check start/stop switch wiring connections
• Do not use the chainsaw if the switch is faulty

This article explains how to replace the chain tensioner assembly if your chainsaw is no longer tensioning the chain correctly.

⚠️ Safety Notice

Ensure the chainsaw is switched off and placed in a safe position before carrying out any maintenance.

Wear suitable protective gloves when handling the chain and bar assembly.

When This Repair Is Needed

You may need to replace the tensioner assembly if:

• The bar does not tighten or loosen correctly
• The tensioning knob no longer engages properly
• The chain cannot be adjusted despite correct operation
• The side cover or chain brake housing is worn or damaged

The tensioner assembly is typically located on the side of the chainsaw and may include the chain brake mechanism.

Important Information

The tensioner assembly design may vary depending on the model. 

Always refer to your specific model manual where available.

Replacement Procedure (General Guide)

1. Switch the chainsaw off and ensure it is fully stopped.
2. Disengage the chain brake.
3. Loosen the tensioning knob and bar cover fixings.
4. Remove the side cover assembly carefully, including the chain brake components where applicable.
5. Inspect the mounting area and ensure it is clean and free from debris.
6. Align the new tensioner assembly with the guide bar and tensioning screws.
7. Fit the assembly into position, ensuring the tensioning mechanism correctly engages.
8. Refit and secure the side cover.
9. Adjust the chain tension using the tensioning mechanism.
10. Tighten the knob securely once correct tension is achieved.

If the Issue Persists

If the replacement assembly does not resolve the issue, or you are unsure about installation, please contact our Technical Support Team for further assistance.

✔️ Summary

• Switch chainsaw off and disengage chain brake
• Remove side cover and old tensioner assembly
• Align and fit new assembly correctly
• Ensure tensioning mechanism engages properly
• Re-tension chain and secure cover

This article explains how to replace and correctly route the fuel lines on your petrol chainsaw.

⚠️ Safety Notice

Ensure the chainsaw is switched off and completely cooled before carrying out any maintenance.

Work in a well-ventilated area away from open flames or ignition sources, as fuel is highly flammable.

When Fuel Lines Need Replacing

Fuel lines may need replacing if:

• The chainsaw is difficult to start
• Fuel is leaking from the machine
• The engine is running inconsistently
• The fuel lines appear cracked, brittle, or damaged

Important Information

Fuel line routing can vary depending on the model of chainsaw. Always refer to the correct diagram for your specific machine, including part numbers where provided.

Fuel Line Replacement (General Guide)

1. Remove any remaining fuel from the tank safely.
2. Open the fuel tank access area where applicable.
3. Carefully remove the old fuel lines, noting their original routing positions.
4. Compare the new fuel lines with the originals to ensure correct length and fit.
5. Install the new fuel lines following the correct routing diagram for your model.
6. Ensure each line is securely seated and not kinked or pinched.
7. Refit any components removed during the process.
8. Refill with the correct fuel mixture before testing.

Important Tip

Correct routing is essential for proper fuel delivery. If the lines are connected incorrectly, the engine may not start or may cut out during use.

If You Need Further Assistance

If you are unsure about the correct routing or are unable to complete the replacement, please contact our Technical Support Team for further guidance.

✔️ Summary

• Replace cracked or damaged fuel lines
• Follow the correct model-specific routing diagram
• Ensure lines are not kinked or blocked
• Refill with correct fuel mix after installation

This article explains how to prepare your petrol chainsaw for winter storage to help prevent fuel issues and starting problems when the machine is next used.

⚠️ Safety Notice

Ensure the chainsaw is switched off and completely cooled before carrying out any maintenance.

Work in a well-ventilated area away from any sources of ignition, as fuel is highly flammable.

Preparing Your Chainsaw for Winter Storage

Follow these steps to correctly prepare your chainsaw:

1. Drain any remaining fuel from the fuel tank.
   • This helps prevent fuel degradation and residue build-up during storage.
2. Run the engine until all remaining fuel in the carburettor has been used.
3. Press the primer bulb to help clear any remaining fuel from the system.
4. Attempt to start the chainsaw.
   • If it does not start, the fuel system has been successfully emptied.

Storage Instructions

• Store the chainsaw in a clean, dry location.
• Avoid damp environments to prevent corrosion and component damage.

✔️ Summary

• Drain fuel from the tank
• Run engine to empty carburettor
• Use primer bulb and attempt restart to confirm empty system
• Store in a dry location

This article explains the procedure for replacing the oil pump on your petrol chainsaw.

⚠️ Safety Notice

This procedure is complex and requires a good level of mechanical skill.

Ensure the chainsaw is switched off, fully cooled, and disconnected from any fuel source before starting work.

If you are unsure at any stage, please contact our Technical Support Team before continuing.

Tools Required

• Clutch removal tool
• Piston stop
• Torx bit (T20)
• 13mm socket
• Replacement oil pump

Oil Pump Replacement Procedure

1. Remove Chain Brake Assembly

• Remove the chain brake assembly using the 2 x 13mm nuts.

2. Remove the Clutch

• Insert the piston stop into the spark plug hole.
• Use the clutch removal tool to rotate the clutch clockwise (towards OFF).
• The clutch may be tight at first before loosening.
• Continue until the clutch is fully removed.

3. Access the Oil Pump

• Remove the top two screws on the black cover behind the clutch using a T20 Torx bit.
• Remove the cover to expose the oil pump.

4. Remove the Oil Pump

• Unscrew the 2 x Torx screws securing the oil pump.
• Take care with the earth cable located on the top right screw.

5. Install the New Oil Pump

• Fit the new oil pump into position.
• Reconnect the oil pipes and earth cable.
• Tighten the oil pump screws securely.

6. Reassemble the Chainsaw

• Refit the black cover (2 x Torx screws).
• Reinstall the clutch using the clutch tool.
• Tighten the clutch by hand (anti-clockwise) until secure, but do not overtighten.
• Ensure the clutch rotates freely and all components are correctly seated.

7. Refit Cutting Components

• Reinstall the chain, guide bar, and chain brake assembly.

8. Final Check

• Ensure all parts are correctly fitted and secure.
• Test operation carefully before use.

If You Are Unsure

If you are not confident completing this procedure, please contact our Technical Support Team for further assistance or advice.

✔️ Summary

• Remove chain brake and clutch
• Access oil pump via rear cover
• Replace oil pump and reconnect pipes and earth cable
• Reassemble all components carefully
• Test before use