This demonstrates reverse bump starts in this case my 1.8 Moki two stroke. As some of the fellows above back in 2008 stated reverse bump starts two stroke or four stroke requires that the engine be in the perfect state of prime and not all engines like the technique I use electric start for many of my engines but a few that respond well to reverse bumping I do use it.
Remember when using an electric starter and this is especially important with for strokes is that you completely back up the prop manually aginst compression before applying the starter in the normal direction.
John
https://www.youtube.com/watch?v=LyvLW5q6BaM