Dolmar MS290.4U Original Instruction Manual page 23

Replacing the fuel pipe
Interval for cleaning and inspection: Daily (every 10
operating hours)
Replacement: Annually (every 200 operating hours)
To avoid fuel leaks, which can lead to a fire, replace
the fuel pipe every year regardless of the operating
frequency. If any leake are found, replace the fuel pipe
immediately.
1
► 1 . Fuel pipe
Inspecting the bolts, nuts, screws
• Retighten loose bolts, nuts, etc.
• Check for fuel and oil leaks.
• Replace damaged parts with new ones for safety
operation.
Cleaning the parts
• Always keep the engine clean.
• Keep the cylinder fins free of dust or dirt. Dust or
dirt on the fins may cause piston seizure.
Replacing the gaskets and packings
Replace gaskets and packings when the engine is
disassembled.
Replacing the nylon cord
WARNING:
Always remove the cutting head
when replacing the nylon cord. Stop the engine
before removing the cutting tool.
WARNING:
For the bump and feed type of
nylon cutting head, be sure that the cover of the
nylon cutting head is secured to the housing
properly as described below. Failure to properly
secure the cover may cause the nylon cutting head to
fly apart, resulting in a serious personal injury.
The method of replacing the nylon cord varies depend-
ing on the cutting tool type. Replace the nylon cord if
the cord is not feeding any more.
For manual feeding type cutting tools, feed the cord by
passing the cord from another eyelet.
23 ENGLISH