Select to expand quoteJacobMatan said...
If they modified the engine for marine use and added buoyancy and made a design that could water start we would have a legit amphibious vehicle on our hands
Isn't this what a jet ski is for?
Select to expand quoteharry potter said...
Only a jet ski is not amphibious 
Neither is a motorbike with a waterproofed engine, flotation and paddles fitted to the tyres...
^^^ Well that is kind of the idea behind putting in the waterproof engine, floatation and paddle tyres is that it would then be amphibious.
It would be very possible, whether it's practical or there is a market for it I don't know
