It would be worth checking out "The Gurnards" youtube videos, if you havent already done so....he has a smaller sib, ( mostly in his earlier vids) with a 6hp yahaha 4 stroke, that purrs like a kitten and sips the juice.....it appears to have an integral tank, and a remote tank. He has travelled about a million miles around the West of Scotland, in all weathers with his one. It's worth taking note of his extensive experience.
I had also heard that the yamaha HP is measured at the prop, and not the powerhead like many others. This may give you a power advantage, for the "same" HP rating.
Worth checking out.
Im no expert ....but ive got big ears!!
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