Spacetin below sells 25 engines for $25. Buzz's boatyard has the cheapest regular boats I've seen recently. I bought a bunch of unpainted ones wholesale a while back for $1.75 each, although some of the motors brass diaphrams seem to small corrosion places that leaked. You may want to look at making some of Harrison's aluminum can engines.
--- In firstname.lastname@example.org, "eknispel@..." <eknispel@...> wrote:
> In the past, I have been buying 30-40 motors a year from Kelvin.com ( a really great store for science and technology projects) for our biodiesel putt-putt boats in chemistry class. This year they all came unsoldered when heated!!!
> Does anyone know of another company selling them? Anyone got contacts in India (where Kelvin gets theirs made) so I could go straight to the source?
> Any leads would be greatly appreciated.
> Eric in St. Louis