How to clean out your carburettor

If your petrol-powered machine has been standing unused for a period of time, old fuel can cause starting and performance issues. Draining the carburettor and replacing the fuel with fresh petrol can often help resolve these problems.

Before You Begin

Safety Equipment

Before carrying out this procedure, ensure you:

• Wear appropriate personal protective equipment (PPE)
• Work in a well-ventilated area away from sources of ignition
• Keep naked flames, sparks, and cigarettes away from the work area

Tools Required

• 10 mm spanner or socket
• Metal container or fuel-safe collection tray
• Fresh petrol

Important: Ensure you have a suitable metal container positioned beneath the machine to safely collect any fuel that is drained.

Draining the Carburettor

Step 1 – Position the Collection Container

Place a metal container directly beneath the carburettor drain bolt to catch the fuel as it drains from the system.

Step 2 – Remove the Drain Bolt

Using a 10 mm spanner or socket, carefully loosen and remove the carburettor drain bolt by turning it anti-clockwise.

Step 3 – Allow the Fuel to Drain

Once the drain bolt has been removed, fuel will begin to flow from the carburettor.

Allow all fuel to drain into the collection container.

Note: If the fuel tank is full, fuel may continue to flow until the tank is empty.

Step 4 – Refit the Drain Bolt

Once the fuel has completely drained:

1. Reinstall the drain bolt.
2. Tighten it securely, taking care not to overtighten.

Step 5 – Dispose of Old Fuel Safely

Dispose of the drained fuel in accordance with local regulations.

Do not pour petrol down drains, onto the ground, or into household waste.

Refill with Fresh Fuel

Once the carburettor has been drained and the drain bolt has been securely refitted:

1. Fill the fuel tank with fresh petrol.
2. Prime the fuel system if your machine is fitted with a primer bulb.
3. Start the machine following the normal starting procedure.