Rato R1250HIS-4, Owner'S Manual

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load, change the oil every 25 hours.
• If the engine frequently work under dusty or other severe circumstances,
clean the air filter element every 10 hours; If necessary, change the air filter
element every 25 hours.
• The maintenance period and the exact time (hour), the one which comes
first should govern.
• If you have missed the scheduled time to maintain your engine, do it as
soon as possible.
If the gasoline engine frequently works under high temperature or heavy
Stop the engine before servicing. Put the engine on a level surface and
remove the spark plug cap to prevent the engine from starting.
Do not operate the 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 CO, inhalation can cause shock,
unconsciousness and even death.