At five knots with the BOB Volvo, she burned just less than a quart per hour. So 20mph. There was literally not so much as a ripple when the boat moved through the water. I went blazing (okay, so it was just 5 knots!) by the FWC (Florida Water Cops) in a Slow/No Wake zone without blinking an eye.
There'd be movement of water aft but nothing. It was crazy wonderful.
That was a 15hp motor running at 1100rpm.
The new Kubota is 18hp and a friend has this same motor in his tractor. He says at 1750rpm the tractor burns 1 liter in two hours. I am curious as to what my results will be moving through the water and assume it will be less than him barreling through the woods on his property on four wheels.
We shall see. Even at 20mph I've a range of nearly 750 miles.
Seaweed is quite a little boat.
I knew a gal named Susan that lived on a 25' Chris Craft when I was a kidlet. She had a dog named Rags. Her daddy lived on a sports-fish and mom had a double cabin yacht-boat. When they moved, all three boats went in ducky-style, one after the other.
Dad fished and drank. Mom shopped and drank. Daughter and I played pirates and Indians.
The 40'er I grew up aboard (a sedan cruiser) started out a bow with a small windshield and a little overhang. The engine was boxed in and I rode my tricycle around the box. Later the cabin (saloon) overhead was extended (many times, over the years) and the boat of course evolved.
Don't tell you-know-who, but she ended up with a fly-bridge. If you own something nearly 50 years though it's natural to change things as needed/desired.
Seaweed is changing too -- it's why I could pick a boat that wasn't all I needed on purchase. I knew that with time I'd add the things to make her more.
So far, so good.