HONDA HHT31S - Manual (Page 29)

SERVICING YOUR HONDA TRIMMER
27
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.
NOTICE
FILTER
AIR CLEANER
COVER
LATCH
TAB
RETAINING
TABS
FILTER
LATCH
TAB
RETAINING TABS
AIR CLEANER
COVER
HHT31S
HHT25S