honda-power-equipment hht31s ユーザーズマニュアル

Engine Oil Recommendations
Oil is a major factor affecting performance and service life. Use 4-stroke automotive detergent oil.

SAE 10W-30 is recommended for all temperatures within the recommended operating range for these 
trimmers. The recommended operating range extends from 23

°F (-5°C) to 104°F (40°C).

The SAE oil viscosity and service classification are on the API label on the oil container. Honda 
recommends that you use API SERVICE category SJ or SL oil.

Air Filter Check    
Press the air cleaner latch tab, and remove the air cleaner cover. Check the filter to be sure it is clean 
and in good condition.

If the filter is dirty, clean it as described under Air Filter Cleaning. Replace the filter if it is damaged. 
Reinstall the filter and air cleaner cover.

Operating the engine without an air filter, or with a damaged air filter, will allow dirt to enter the engine, 
causing rapid engine wear. This type of damage is not covered by the Distributor's Limited Warranty.

Air Filter Cleaning    
A dirty air filter will restrict air flow to the 
carburetor, reducing engine performance. If you 
operate the engine in very dusty areas, clean the 
air filter more often than specified in the 
MAINTENANCE SCHEDULE.

1. Clean the air filter in warm soapy water, rinse, 

and allow to dry thoroughly. Or clean in non-
flammable solvent and allow to dry.

2. Dip the air filter in clean engine oil, then 

squeeze out all excess oil. The engine will 
smoke when started if too much oil is left in 
the filter.

3. Wipe dirt from the air cleaner base and cover 

using a moist rag. Be careful to prevent dirt 
from entering the carburetor.