Daft so and so, that'll need at least 2 outboards! Try this one:
HOHWACHT comes with it's own engines, twin screw and aluminium hulled over steel frames and is fairly quick. Perhaps a trifle big for the Macclesfield Canal but will probably fit on the Humber or Thames but might be a bit juicy to run.
Now if you want some propellers for them have a look here www.haskayneengineering.co.uk Thay are on the bottom of I think, the home page and the contact page Should generate the required thrust