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

Refueling
Fuel tank capacities:
HHT25S: 0.53 qt/16.9 fl oz (0.50 

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HHT31S: 0.69 qt/22.0 fl oz (0.65 

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Check the fuel level by looking through the 
translucent fuel tank. If the fuel level is low, refuel 
in a well-ventilated area with the engine stopped. 
If the engine has been running, allow it to cool 
first.

To refuel, rest the trimmer on the ground with the 
fuel tank cap facing up, as shown. Remove the 
fuel tank cap, and fill the tank with gasoline to the 
bottom of the filler neck. Refuel carefully to avoid 
spilling fuel. Do not overfill. There should be no 
fuel in the filler neck. After refueling, tighten the 
fuel tank cap securely.

Never refuel the engine inside a building where 
gasoline fumes may reach flames or sparks. 
Keep gasoline away from appliance pilot lights, 
barbecues, electric appliances, power tools, etc.

Spilled fuel is not only a fire hazard, it causes 
environmental damage. Wipe up spills 
immediately.

Move at least 10 feet (3 meters) away from the 
fueling source and site before starting the engine.

Fuel Recommendations
Use unleaded gasoline with a pump octane 
rating of 86 or higher.

These engines are certified to operate on 
unleaded gasoline. Unleaded gasoline produces 
fewer engine and spark plug deposits and 
extends exhaust system life.

Never use stale or contaminated gasoline or an 
oil/gasoline mixture. Avoid getting dirt or water in 
the fuel tank.

Occasionally you may hear a light “spark knock” 
or “pinging” (metallic rapping noise) while 
operating under heavy loads. This is no cause for 
concern.

If spark knock or pinging occurs at a steady 
engine speed, under normal load, change brands 
of gasoline. If spark knock or pinging persists, 
see an authorized Honda servicing dealer.

Running the engine with persistent spark knock 
or pinging is misuse, and the Distributor's Limited 
Warranty does not cover parts damaged by 
misuse.

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Gasoline is highly flammable and explosive.

You can be burned or seriously injured when 
handling fuel.

Stop the engine and keep heat, sparks, and 
flame away.

Handle fuel only outdoors.

Wipe up spills immediately.