it is very fast
About 240 MPH
150MLP
First, it needs to be mounted on the boat. And the boat determines how fast the attached motor will go. If the boat is wood, then it will likely float deeper in the water, and not be particularly fast. If the boat is a smaller fiberglas one, then the motor and boat will go faster. Based on much boating experience, I would say that most boats could go 30 to 35 mph with the 40hp Merc.
E=mc2
70
A BIG engine or electric motor.. Or a BIG sail.
19 mph
I have a 2.7m Inflatable boat and have a 2.5hp Marriner engine the engine will allow the boat to cruise at around 8knots and that is with 3 of us in the boat.
Depends on how fast the boat is traveling. On a boat traveling at 30 mph it will take 30 minutes.
Depends on stride length. Strength of your legs. How fast you are walking.
About 10 to 12 on plane
It really depends on how big your boat is and how fast you want to go typically you want to go 20-25 while tubing so get a big enough motor to push your boat with a tube 20-25 mph