I have managed to snag a 25 CC STIHL engine from a weedwacker. I've stripped of the plastic, but not real sure where to go from here, and would like some help. (This will end up on an airboat, so min weight is not as big an issue). I know that i need to take off the flywheel, but is it a right or left handed nut?

Also, Are there simple cheep things that I can do to up the ponies on this? Preferably thigns I can do myself? I have a really tight budget, so going all out is not an option. What one item woudl you upgrade? Carb? Muffler?

Also if you have any web-links to help with this that would be great.

Thanks!