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Introduction

This tutorial provides a step-by-step guide on troubleshooting and repairing a gasoline-powered trimmer that won’t start. Based on the video by Sergey Lesnyak, you’ll learn practical techniques to diagnose the problem and perform necessary fixes.

Step 1: Check the Fuel System

• Inspect the Fuel Quality

  • Ensure that you are using fresh gasoline. Old or contaminated fuel can prevent the engine from starting.

• Examine the Fuel Lines

  • Look for cracks or blockages in the fuel lines. Replace any damaged lines to ensure proper fuel flow.

• Clean or Replace the Fuel Filter

  • If the filter is clogged, clean it or install a new one to enhance fuel flow to the engine.

Step 2: Assess the Spark Plug

• Remove the Spark Plug

  • Use a spark plug wrench to carefully remove the spark plug from the engine.

• Inspect the Spark Plug Condition

  • Check for carbon buildup or wear. If it looks dirty, clean it with a wire brush or replace it if necessary.

• Test for Spark

  • Reconnect the spark plug wire and ground the plug against the engine. Pull the starter cord to check for a spark. If there’s no spark, you may need to replace the ignition coil.

Step 3: Examine the Air Filter

• Remove the Air Filter Cover

  • Unscrew or unclip the cover to access the air filter.

• Inspect the Air Filter

  • If it’s dirty or clogged, clean it with soap and water or replace it. A clean air filter is essential for proper air intake and engine performance.

Step 4: Check the Carburetor

• Inspect the Carburetor

  • Look for signs of fuel leaks or clogs. If the carburetor is dirty, disassemble it for cleaning.

• Clean the Carburetor

  • Use a carburetor cleaner to remove any buildup. Ensure all jets and passages are clear to allow for proper fuel-air mixture.

Step 5: Examine the Gaskets and Seals

• Inspect for Leaks

  • Check the gaskets and seals for wear or damage. Leaks can cause loss of compression, preventing the engine from starting.

• Replace Damaged Seals

  • If you find any damaged seals, replace them to ensure a tight fit and proper engine function.

Conclusion

To successfully troubleshoot and repair a gasoline-powered trimmer that won’t start, follow these steps systematically. Start by checking the fuel system, inspecting the spark plug, and ensuring the air filter is clean. Don't forget to examine the carburetor and seals for any issues. By addressing these common problems, you can get your trimmer running smoothly again. For further assistance, consider watching additional repair videos or consulting a professional if needed.