I could make it more powerful and tune it more, but I'm happy with it running and being good looking as it is.
Each spawn a smoke effect will happen. If you reduce the braking power of the load wheel, you will start to see the hit and miss effect as now and then it wont fire. The centrifugal governor limits at roughly 90rpm.
Hope you all like it, its loose too, so you can pick it up and stick it on anything... some instruction is on the plate on the engine

give credit if you use it please!
EDIT : if you want to tune it, stronger governor springs, and heavier spawned circles should do it. Up to you really if you use it!
EDIT 2 : I've tuned the engine myself, here is the new MUCH more powerful version.
http://www.phunland.com/phunbox/details/29331