51GLOSSARYRecoil Starter Starts engine by turning crankshaft and moving piston up anddown.Recoil Starter Handle Molded rubber handle attached to starter cord. Used to startengine.Ricochet When a thrown object bounces off another surface.Safety Glasses Eye protection devices that are worn like glasses.Safety Goggles Eye protection devices that fit flush against the face and coverthe complete eye and socket.SB Split Boom model (similar to PAS )Scalping Cutting grass or other vegetation down to ground level. Usedfor clearing grass and other growth.Scything Using an arcing cutting motion to trim weeds and grass.Semi-Automatic Line Head Nylon line head that feeds line out when tapped on the groundduring normal operation.Spark Arrestor Muffler Muffler with spark arrestor screen that prevents hot, glowingparticles of carbon from leaving the muffler.Spark Plug Provides spark to ignite fuel/air mixture in engine.SRM Shoulder Rotary Mower, also known as a trimmer-brushcutter.SRM (Straight Shaft) models can be adapted to use metalblades (Brushcutter Application).Stalling Engine Using choke lever to provide an overly rich fuel/air mixture thatstops engine from running.Stop Switch Electrical switch used to start/stop engine. Grounds ignitioncircuit in Stop position to prevent firing of spark plug.Throttle Trigger Controls engine speed.Throttle Trigger Lockout Lever Prevents the throttle trigger from operating unless lockout leveris depressed.Tri-Cut Blade A blade with 3 cutting edges.U-Handle A bicycle-style handlebar that provides two handgrips spacedapart for maximum cutting control.Wide Open Throttle The highest engine speed attainable when the throttle trigger isheld fully depressed.