Stihl brand and other weed trimmers use a two- stroke engine, meaning the engine completes one combustion cycle in a single turn of the crank shaft. STIHL professional grass trimmers also boast an exceptional power-to-weight ratio, putting every last ounce of their well-balanced construction to work. To help you identify model features, look for these corresponding symbols: C = Comfort feature, E = Easy2Start™, R = loop handle, and X = lightweight version. Keeping this in consideration, what does the R mean on Stihl trimmers? Where is model number on Homelite trimmer? Homelite Model and Serial Number Locations Homelite chainsaws typically have the model number plate located on the rear handle. Just so, where is the model number on a Black and Decker trimmer?īlack and Decker The model and type number are usually displayed on the name plate, with the model number above the type number (see picture below).