Re: How durable are these engines?? 66cc
Don't count on a lot. The guy above me is correct. Still, these are not Rolls-Royce engines.
And the way you intend to use them is gonna be hard on 'em.
Still, you sound like the sort who can use tools and learn about your machine. You'll probably be able to make it work. But count on some headaches.
The good news is that you'll be able to replace engines with little more than pocket change. That's an exaggeration, yes, but they're inexpensive.