I have a 223L which is mostly the same as the other models. I started it up and it shocked my elbow which has happen for the last year of the 3 or 4 years that I owned it. Well I pull the plug boot off and the freakin spark plug wire snaps off like a hot knife through butter!! The metal coil thing was still on the spark plug. Cheap rubber insulation!! Prolly from the heat. Well I go to the dealer that I love and the warranty was 4 days old!! He still did it under warranty!! Just be careful pulling the wire boot off when changing the plugs. This is the first problem I have ever had but I still love there weed wackers.