X7502310908 19© 03/2014 ECHO Inc.SRM-280U OPERATIONBlade SelectionThe type of Blade used MUST be matched to the type and size of material cut. An improper or dullblade can cause serious personal injury. Blades MUST be sharp. Dull blades increase the chance ofkick-out and injury to yourself and bystanders.Plastic/Nylon Grass/Weed Blades may be used where everthe nylon line head is used. DO NOT use this blade for heavyweeds or brush!8 Tooth Weed/Grass Blade is designed for grass, gardendebris and thick weeds up to 19 mm (3/4”) diameter. DO NOTuse this blade for brush or heavy woody growth.80 Tooth Brush Blade is designed for cutting brush and woodygrowth up to 13 mm (1/2 in.) diameter.22 Tooth Clearing Blade is designed for dense thickets andsaplings up to 64 mm (2-1/2 in.) diameter.Use Shoulder/Waist Harness Use of the Shoulder/WaistHarness is recommended for ALL Trimmer/Brush Cutter use,not just Blade operation. The Shoulder/Waist Harness whenused in a trimming operation with nylon line head suspends thetrimmer from the operator's shoulder and reduces operatorfatigue.During blade operation, the same fatigue reduction is achieved.Safety to the operator is also enhanced by reducing thepossibility of blade contact with the operator's hands and feet byrestricting trimmer movement.