Best extra-long shaft outboard, for driving displacement hulls?

[dancrane]

Please, tell me there's a chap in a shed by a river in India, accepting orders for those via ebay?

 

[James_Calvert]

What you need for ultimate torque at low revs is a steam-engined outboard

Now that would be lovely and quiet too, and it might fry your breakfast.

But I see it appears to have a 360 degree swivel for reverse - might make stoking it a bit problematic?

 

[Lakesailor]

I didn't look that closely. Most steam boats just reverse the engine.

It's in Hobart actually. Read about it http://www.steamboat.com.au/Steam Outboard.htm