My Petrol Chainsaws start/stop switch will not turn off the Chainsaw

Quick Answer

If the start/stop (ignition) switch does not turn off your petrol chainsaw, this is a safety-critical fault usually caused by a wiring issue or a faulty switch. The chainsaw must not be used until the issue has been repaired.

⚠️ Safety Notice

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

⚠️ Do not continue to operate the chainsaw until the fault has been identified and repaired.

How to Stop the Chainsaw in an Emergency

If the ignition switch fails to turn the engine off:

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

⚠️ These steps 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 connections are secure
• Check for any loose, broken, or damaged wires
• Look for signs of wear or disconnection

A faulty or disconnected wire may prevent the switch from stopping the engine.

Important Information

If the start/stop switch does not stop the chainsaw when moved to the STOP position:

• The machine must be repaired before further use
• Do not attempt to operate the chainsaw again until the fault is resolved
• Do not rely on emergency stopping methods for normal use

When to Contact Support

Contact our Technical Support Team if:

• The chainsaw does not stop using the switch
• Wiring appears damaged or disconnected
• The switch feels loose or unresponsive
• You are unsure how to safely inspect the issue

We can advise on repair options or replacement parts.

Frequently Asked Questions

Why won’t my chainsaw turn off with the stop switch?

This is usually caused by a faulty switch, broken wiring, or a disconnected earth/kill wire.

Is it safe to keep using my chainsaw if the stop switch doesn’t work?

No. This is a safety-critical fault and the chainsaw must not be used until repaired.

How do I stop the chainsaw if the switch fails?

Use the choke to stall the engine and engage the chain brake, but only as an emergency measure.

Can a faulty switch be repaired?

In some cases the wiring can be repaired, but often the switch assembly will need replacing.