I have an 1963 Pengor Penguin that was originally powered by a 10hp 2 stroke motorcycle engine.
The motor could be started in the opposite direction to give you reverse gears.
I am pondering the idea of replacing it with something more modern if I cannot repair the original.

I have seen some small 4 stroke motors (chinese) on ebay that also have reverse. They claim 7.5kw of power which converts to 10hp.

Would they be the equivalent of 10hp 2 stroke?

Thanks