Uggh, you are right about that. Amazon says they weigh about 19 lbs. That might include a very heavy box?? Hey, it's an option! This starter/generator + the pulley/prop hub is probably still a little lighter than the flywheel + starter + prop hub it would replace. More importantly, it gets rid of the weight on the flywheel end of that crankshaft.This thing looks like a pretty heavy lump. I haven't yet found a weight for it.