How do I start my Petrol Strimmer

Quick Answer

Starting a petrol strimmer correctly depends on whether the engine is cold or already warm. For a cold engine, prime the fuel system, apply full choke, and start the engine before moving the choke to the run position. For a warm engine, the choke should normally remain in the run position.

Before starting, ensure you are using fresh fuel mixed to the manufacturer's recommended ratio.

⚠️ Safety Notice

Before starting your petrol strimmer:

• Read the user manual and ensure you are familiar with all controls.
• Wear suitable personal protective equipment (PPE), including eye protection, hearing protection, gloves, and sturdy footwear.
• Ensure the cutting head is clear of people, pets, and obstacles.
• Check that the cutting attachment is fitted securely and rotates freely.
• Never start the machine indoors or in an enclosed area.

Cold Start Procedure

Use this procedure when starting the engine for the first time of the day or after the machine has been unused for an extended period.

Step 1: Position the Machine

Place the strimmer on a flat, stable surface free from grass, stones, or other debris.

Support the machine using the engine housing and safety guard.

Step 2: Set the Start/Stop Switch

Move the Start/Stop switch to the START position.

Step 3: Prime the Fuel System

Press the primer bulb approximately 7 times, or until fuel can be seen flowing through the bulb and no air bubbles remain.

This fills the carburettor with fuel and makes starting easier.

Step 4: Apply Full Choke

Move the choke lever to the Full Choke position.

Indicator: Horizontal line

This reduces airflow and provides a richer fuel mixture for cold starting.

Step 5: Pull the Starter Cord

• Hold the machine securely using the rear handle.
• Pull the starter cord slowly until resistance is felt.
• Pull firmly and smoothly 3–4 times.

The engine should begin to fire or briefly run.

Step 6: Move to Half Choke

Once the engine begins to fire:

Move the choke lever to the Half Choke position.

Indicator: Diagonal line

This allows additional airflow while the engine continues warming up.

Step 7: Start the Engine

Pull the starter cord again until the engine starts and continues running.

Step 8: Warm Up the Engine

Allow the engine to idle for approximately 30 seconds before operating the throttle.

On many models, pressing the throttle trigger will automatically return the choke to the Run position.

Warm Start Procedure

Use this procedure when restarting the machine shortly after it has been switched off.

Step 1: Set the Start/Stop Switch

Move the Start/Stop switch to the START position.

Step 2: Set the Choke to Run

Move the choke lever to the Run position.

Indicator: Vertical line

This allows maximum airflow into the engine.

Step 3: Start the Engine

Pull the starter cord firmly until the engine starts and runs normally.

If the engine has cooled significantly, repeat the Cold Start Procedure instead.

Starting Control Guide

Frequently Asked Questions

Why won't my petrol strimmer start?

Common causes include stale fuel, an incorrect fuel mixture, insufficient priming, the wrong choke position, or a fouled spark plug.

How many times should I press the primer bulb?

Approximately 7 times, or until fuel is visible and any air bubbles have disappeared.

Should I use the choke when the engine is warm?

No. For a warm engine, the choke should normally remain in the Run position.

Why does the engine stop after it first fires?

This is normal during a cold start. Move the choke to the Half Choke position and pull the starter cord again until the engine starts and runs continuously.

Why does the choke return to the run position?

On many petrol strimmers, pressing the throttle trigger automatically disengages the choke and returns it to the normal Run position.