DR Power RapidFire 5.5 HP Subaru (July 2013 - Present) Engine Manual - Manual (Page 12)

12 DR ® 5.8 HP ENGINE
Never clean the air cleaner filter with gasoline or low flash-point detergents, or explosion may happen.
2. MAINTENANCE METHOD
1) Replacement of engine oil (see “Oil Level Check” in Chapter IV to check oil level)
The oil will drain more rapidly and completely when the engine is warm.
(1) Remove the oil filler cap and drain plug to drain engine oil thoroughly.
(2) Reinstall the drain plug and screw in securely.
(3) Fill with the specified engine oil up to the upper level mark.
(3) Reinstall the oil filler cap.
2) Maintenance of air filter
A dirty air filter can restrict air flowing into the carburetor. To keep the carburetor in good working condition, please service
the air filter periodically (clean air filter element after 20h of use). If the engine is being operated in an extremely dusty area,
clean the filter more often.
(1) Remove the air filter cover and take the filter out.
(2) Paper element: Wash the element with home detergents and warm water (or non-flammable or high flash-point cleansing
solvents) and dry completely.
Foam element: Clean foam and soak in clean engine oil until saturated. Squeeze out excess oil. Too much oil in the foam
element will cause the engine to smoke when running.
(3) Clean the air filter cover and inner surface with wet cloth, be careful not to allow the dust to
enter into the carburetor.
(4) Reinstall the air filter and put the air filter cover on.
3) Spark plug
Spark plug type: F6RTC or equivalent.
To ensure the engine will run normally, the spark plug gap must be correct and make sure there are
no deposits around the spark plug.
(1) Remove the spark plug cap.
Do not dump oil containers or discarded engine oil into rubbish boxes or onto the ground. For the sake of environmental
protection, we suggest you take in discarded engine oil with a closed container and bring to local recycling station.
Oil Dipstick
Drain Plug
Washer
Never run the engine without an air filter because dirt and dust entering the engine can speed up engine wear and cause damage.