Be careful on that one. I'd simply have an invoice for the boat and all the accessories, and a second for the trailer. You will have to pay GST on everything regardless. Why I'd be careful here, is if the accessories are manufactured in countries that don't have a Free Trade agreement with Canada, you might end up paying BOTH GST and DUTY on the items and it could cost you even more. If you can, lump all of you accessories into the invoice for the boat. No duty on the boat if its made in the USA. The engine and accessories are considered part of the boat. Triple check the serial number on the boat, motor and trailer and be 110% sure that they match your invoice, or the boarder team will turn you around -- when I did this, the dealer had made a mistake which I caught before leaving so they did up a new invoice.
If you want warranties on your engines in Canada -- don't buy Yamaha!!!
TenMile
<'((((><