Honda HHT Trimmers – Maintenance Tips to Keep them Running Smoothly


Now that you have purchased your new Honda HHT Trimmer, there are a few things you should know before you begin to operate the machine. Please note that the trimmer requires special oil and recommended fuel. Read the owner’s manual before you begin operation of your new trimmer. You might also want to follow these maintenance tips to keep your machine running properly each time you use it:

Maintenance to the Engine

To prevent damage to the engine, always be sure the trimmer is operating with the proper amount of oil. Too much oil can do as much damage as not having enough. If the oil level is low, please refer to your owner’s manual for the proper filling procedure. 4-stroke automotive detergent oil should be used for this machine.

Changing the Oil

When changing the oil, it’s important to note that you will get the best results from draining the oil while it’s warm. Using a proper container, remove the filler cap and dipstick to drain the oil. Refill with the 4-stroke oil and replace the dipstick and filler cap. Please refer to your owner’s manual for the proper procedure. During the oil changing process, keep in mind that you must dispose the used oil properly. Never dispose of the oil in the lawn, river, or garbage.

Air Filter

If the air filter isn’t clean, the air will not flow properly to the carburetor, causing the engine to malfunction. Remove the air filter cover to inspect the filter. If it’s dirty, please refer to the owner’s manual for the proper cleaning techniques. If you’re operating the trimmer in a dusty atmosphere, the filter will get dirty more often and will require more frequent maintenance.

Throttle Cable

Inspect the throttle trigger to be sure it’s working properly, and be sure the cable is free from damage. Check the play in the cable, and if you feel it’s too loose, follow your owner’s manual for the proper adjustment procedure. If the trigger is not working properly, you can visit for a replacement part.

Cutting Line Heads

Inspect your nylon line and be sure it’s properly placed in the metal eyelets on the head. If the line is not properly on the spool, check the owner’s manual for the proper feed. Free the head of any debris and clean the dirt, if there are obstructions, the nylon string will not spin properly, causing it to break.

Debris Shield

Inspect the debris shield to be sure it’s not loose or broken. If the shield is not properly placed, it can cause damage and possibly injury. If the shield breaks, make sure to visit our online store for an OEM replacement part.

Spark Plug

Remove the spark plug and inspect the electrodes and insulator. If the electrodes appear to be worn, or the insulator is cracked or chipped, it is time for a replacement. Free the spark plug of any dirt or debris before placing it back into the trimmer. Please refer to your owner’s manual for the proper way to remove and replace the plug. If it’s loose, it can cause the machine to overheat and cause damage to the engine.

Check the Fuel Level

Before beginning to operate, check the level of fuel through the translucent fuel tank. Be sure the machine is cool and in a well-ventilated area before beginning to refuel. Assure the cap is tightened before beginning to use. Refer to your owner’s manual for fuel recommendations and proper care of the filter and tank.

Important Safety Rules to Remember

  • Always wear protective clothing while operating machinery.
  • Always operate the trimmer in a well-ventilated area.
  • Avoid injury by turning off the machine and allowing it to cool before inspecting parts.

When it’s time to replace your parts, contact, and use the convenient parts lookup tool to easily find your replacement.

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