DR Power RapidFire 5.5 HP Subaru (July 2013 - Present) Engine Manual - Manual (Page 11)

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Stop the engine before servicing. Put the engine on a level surface and remove the spark plug cap to prevent the engine from
starting. Never run your engine in a poorly ventilated room or other enclosed area, be sure to keep good ventilation in working
area. The exhaust from the engine may contain poisonous gases, inhalation can cause shock, unconsciousness and even death.
VIII: Maintenance
The engine must be properly maintained to ensure safe operation, economy and trouble-free, as well as eco-friendly.
In order to keep your gasoline engine in good working condition, it must be periodically serviced. The following maintenance
schedule and routine inspection procedures must be carefully followed.
Frequency
Items
Before use First month or first
20hrs of operation Every 3 months or
every 50hrs of
operation Every year or every
100 hrs of
operation
Engine oil Check- Refill √
Replace √ √
Air filter element Check √
Clean √
Replace √
Deposit Cup( if
equipped) Clean √
Spark Plug Check - adjust √﹡
Spark arrester Clean √
Idling ( if
equipped)﹡﹡ Check - adjust √
Valve clearance
﹡﹡ Check-adjust √
Fuel tank & fuel
filter ﹡﹡ Clean √
Fuel line Check Every 2 years( change if necessary)
﹡ These items should be replaced as needed.
﹡﹡ These items should be maintained and repaired by our authorized dealer, unless the owner has appropriate tools and is
proficient with mechanical maintenance.

If the gasoline engine is frequently operating under high temperature or heavy load, change the oil every 25 hours.
 If the engine is frequently operating under dusty or other severe circumstances, clean the air filter element every 10 hours; If
necessary, change the air filter element every 25 hours.

Perform maintenance according to which one come first, period or the exact time (hours).