Small Engine Problems? Ask an Engine Mechanic for Answers ASAP
The question you are sking has way to many variables to answer. The honest answer is that you can not convert (cc's) or (ci's) Horsepower has to be measured by some device designed to measure horse pwer as in a (DYNOMOMETER).
there are many discussions about this out on the net here is one link. I hope this helps you. Thanks for asking Donny