....well 0.75 to 15cc depending which you look at.
I love anything mechanical, but the internal combustion engine is without a doubt the best invention ever, regardless of size and purpose.
Terry has a collection of model airplane and boat engines - these things are awesome; even more so when you fire them up. Fully functioning engines this small are just fascinating!
Those big ole 15cc engines are all magnesium, so cool!
On ebay now...