Hard Starting

1. Fuel-related issues: Check the fuel system, including the fuel tank, fuel lines, and carburetor. Ensure there is enough fuel in the tank and that the fuel lines are not clogged or damaged. If the fuel is old or contaminated, it may be necessary to drain and replace it. Clean or replace the fuel filter if necessary. Additionally, the carburetor may need cleaning or adjustment to ensure proper fuel flow.

2. Spark plug condition: A worn or fouled spark plug can make starting the trimmer difficult. Inspect the spark plug to ensure it is in good condition, with the correct gap and a clean electrode. If it appears damaged or dirty, consider replacing it with a new one.

3. Air filter clogging: A clogged air filter prevents adequate airflow, making it harder to start the trimmer. Remove the air filter and clean or replace it if necessary, ensuring unrestricted airflow to the engine.

4. Choke usage: Follow the proper starting procedure, ensuring you use the choke correctly. Typically, you would close the choke or partially close it when starting a cold engine and then gradually open it as the engine warms up.

5. Ignition system issues: Faulty ignition components, such as a malfunctioning ignition coil or spark plug wire, can make starting difficult. Inspect the ignition system for any visible damage or signs of wear. If necessary, consider having a professional technician check and service the ignition system.

6. Engine compression: Low engine compression can make starting challenging. This issue would typically require professional diagnosis and repair, as it may indicate internal engine problems.

If despite these suggestions, your Tanaka THT-2100 trimmer still struggles to start, it may be best to consult a professional technician who can thoroughly inspect and diagnose the specific issue. They would have the necessary tools and expertise to address any underlying problems.