Pull Start Tool For Mower etc

I posted a video of my drill powered pull starter a while back. I had a quite a few people contacting me directly looking to purchase a unit, so I have developed it and now have a few units for sale.
You can see it in action at    or go directly to https://www.pullstarters.com
All comments most welcome.

That is interesting. Have you tested it on a stihl chainsaw? It has a air bleed button. If that button is not pressed it seems impossible to pull the cord. I am wondering if your unit would cause damage to either it or your device in that circumstance?

Hi, Thanks for the comment. Larger saws will have the bleed button that you describe - these buttons (or valves) are designed to make the cord easier to pull and automatically close when the engine fires. I can safely say that if the button is not pressed, it would not damage the puller unit. I don't believe forgetting to push the button would damage the saw as the valve automatically closes when the engine fires. I guess if the cord is old or frayed, then if the button is not closed the cord may break when the engine is being started.  

I run fairly big chainsaws and they have always had the decompression buttons on them, but I have yet to use them. I would think they would be harder to start because you are taking some of the compression out of the engine upon start? Maybe it does not matter, but I have not noticed any premature wear on the starter rope. But chainsaws have a built in recoil shock on their handles too, so maybe that is part of it?