How to Change a Spark Plug on a Stihl TS420 Disc Cutter | L&S Engineers

In this video, we show you how to replace the Spark Plug on a Stihl TS420. Click here for a full list of parts, tools & transcript! Parts Genuine NGK BPMR7A Spark Plug for Stihl TS410 TS420 Genuine Spark Plug Cap for Stihl TS410 TS420 Non Genuine Spark Plug Cap for Stihl TS410 TS420 Plug Cover/Cap & Screw for Stihl TS410 TS420 Non Genuine Plug Cover/Cap & Screw for Stihl TS410 TS420 Tools Genuine Torx Wrench/Plug Spanner for Stihl TS410 TS420 Non Genuine Torx Wrench/Plug Spanner for Stihl TS410 TS420 Health & Safety Warning Please ensure that you have safely prepared the machine and workspace. If you are unsure about any aspect of the task please seek professional advice. Transcript Today we&going to change the spark plug on a Stihl TS420 Disc Cutter. First of all, using the torx spanner unscrew the screw located at the top of the machine next to the starting button to remove the cover from the machine.Then pull up on the spark plug cap to remove from remove from the spark plug. Now use the 19mm Hex Socket Spanner to unscrew the spark plug. Inspect the old spark plug and see of there&any damage to the seal ring. There&a clear difference between the new and old spark plugs. The old one has a compressed squash ring and looks biscuit coloured. Hand screw the new spark plug in, being careful not to damage the thread. You can then return to tighten it with the 19mm Hex Socket Spanner. Locate the cap back on top of the spark plug, making sure it&secure. Then...