Murray M26-T Instruction Manual page 15

ASSEMBL YPROCEDURES
Fitting Trimmer Line
Only use genuine MURRAY 3mm diameter nylon trimmer line.
Always trim with the correct length of nylon line.
Always ensure that all components are firmly fastened before
starting any operation.
Unequal lengths will cause vibration and damage to unit.
Excessive trimmer line length will damage guard and clutch.
Replace line when 50mm from trimmer head body
Remove used line by pushing back into trimmer head or by levering
out.
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