3D Printed Opposed Piston Engine - How powerful is it?

In my last video, I designed a 3D printed Opposed Piston Engine. I wasn't too sure what to do with this (or any of my other engines), so I asked for some help in the comments.
One of you suggested trying to lift something, so I tried to lift a banana.
DISCLAIMER - 1 Banana was harmed in the making of this video