Some cool, but unusual, ways to "prop"ell yourself in a boat, designed before small outboards engines were affordable

next time you think you need exercise... you can always whip up something like these

But wouldn't you rather have a cool antique outboard like these?

All photos from the Volo Museum in Illinois on ex's site http://justacargal.blogspot.com/2015/06/volo-auto-museum-sale-lot-and-more.html

the largest engine I've heard of in a road (not drag racing) car, Mavis has a 42 liter Packard boat engine

built in 2010, with a 1930 Bentley and a PT boat engine