the problem lies in the double security. To operate the grass height, you have to press a button on the side and on the trigger. Classic until nothing unusual except that during the blade change, the engine should be switched off by removing the cover. Alas so we can pull the trigger to take when changing the subject and have a lateral support (very sensitive button) without doing it on purpose. I made the experience that surprises and very unpleasantly. imagine a chainsaw that starts during a blade change or rotate with the brake !!
