I am pretty sure that you need a licence to operate a boat. So unless they have a boat licence the answer is no.
your probably rated for a 40HP
The speed a 40hp motor can achieve while pulling a tube depends on various factors, including the weight of the tube and riders, water conditions, and boat design. Generally, a 40hp motor can pull a tube at speeds ranging from 15 to 25 mph. However, optimal speeds for tubing are typically around 20 mph for safety and enjoyment. Always consider local regulations and safety guidelines when tubing.
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.
25-30 M.P.H DEPENDING ON BOAT
The dry weight of the Mercury outboard FourStroke 40 HP boat motor released in 2005 is approximately 250 pounds. Later versions of this motor are slightly lighter.
Depends if it fiberglass or Aluminium. For Fiberglass you would be looking at around 50hp-60hp and and Aluminium would be between 30hp and 40hp.
40tlru is the model number for a 1996 2-stroke, oil-injected, 40hp Yamaha outboard boat motor, not a serial number and not for a motorcycle.
The length of a motor boat is not restricted
10-foot boat with a trolling motor
In order to operate a boat in Oregon, you must carry on board your certificate of number.
To operate a boat in Alaska, you are required to carry on board your certificate of number.
you can't