Stihl FC 75 Instruction Manual - Page 12
Warning, Important adjustments, may be worn or damaged and should
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English / USA Do not operate using the starting throttle lock as you do not have control of the engine speed. See section of your owner's manual on the proper use of the slide control. If the cutting tool or deflector becomes clogged or stuck, always turn off the engine, disconnect spark plug lead and make sure the cutting tool has stopped, before cleaning. Keep lead away from spark plug to reduce the risk of unintentional starting. Grass, weeds, etc. should be cleaned off the cutting tool at regular intervals. !Warning! During cutting, check the tightness and the condition of the cutting tool at regular intervals. If the behavior of the tool changes, stop the engine immediately, and check the nut securing the tool for tightness and the cutting tool for cracks and damage. If the edger vibrates abnormally, immediateley stop the engine and check for the cause. Vibration is generally a warning of trouble. Replace cracked, bent, warped, damaged, excessively worn or dull cutting tools immediately. Such tools may shatter at high speed and cause a serious or fatal injury. !Warning! A loose nut may cause the blade to vibrate, crack, break or come off the edger, which may result in serious or fatal injury. Make sure that the blade is properly tightened. Use the wrench supplied or one of sufficient length to obtain the proper torque. If the blade loosens after being properly tightened, stop work immediately. The retaining nut may be worn or damaged and should be replaced. Never use unauthorized parts to secure the blade. Failure to use the proper parts may cause the blade to fly off and seriously injure the operator or bystanders. If the blade continues to loosen, see your STIHL dealer. Do not attach any blade to a unit without proper installation of all required parts. Never use an edger with a loose blade. !Warning! Never touch a rotating cutting tool with your hand or any part of your body. The tool continues to rotate for a short period after the throttle trigger is released (flywheel effect). Important adjustments !Warning! At correct idle speed, the cutting tool should not turn. For directions on how to adjust idle speed, see the appropriate section of your owner's manual. FC 75 11