Re: Difficulty holding at a 25 mph speed
what is your top speed? how many people in the boat? it this the speed that it wants to come off plane? fiberglass or aluminum boat?
doing some research all the 16 ft Fiberglass boat weight +-1,000lbs
the motor weighs 300, and guess the trailer weight.
you can have to complete rig weighted at a Public Scale.
you then have to calculate hull, motor, fuel, gear, trailer weights. if the scale reading is more than the calculate weight, you are carrying extra weight, as in water in the foam. this can be as much as 500LBS.