What is the comparable thrust of a trolling motor to a 3 hp gas motor?

Answer 1

The difference between thrust and horsepower, and how to convert between the two is a very common question. The problem is that these quantities are not directly related, so it is not simple to convert one to the other. The dictionary defines thrust as a force or pressure exerted on an object, and it is typically measured in units of pounds (lb) or newtons (N). Power, however, is a measurement of work, which is defined as the amount of motion a force creates when it is exerted on a body over a certain amount of time. Power is typically measured in units of horsepower (hp) or kilowatts (kW). The most common equation used to relate these quantities is as follows.

P=Fxd/t

where:

P = power (Hp)
F = force (Lbs thrust)
d = distance
t = time

So in other words, there is no linear conversion. BUT, as a general rule for boat thrust and horse power, here are some common numbers used for comparison. Do not hold me to these, they are "general" rules.

1Hp=15-18 Lbs thrust (sometimes)

So, in general, a 3 hp gas engine will give you about 45-54 lbs of thrust, depending on the efficiency of your prop, and how fast your going.

I know it's confusing, but I hope that helps. Happy boating.

Answer 2

The largest trolling motor in creation might give as much thrust as a good 2 cycle 3HP gas motor. At trolling speeds it may not matter, but there is really no comparison in power.

Answer 3

Lets see, trolling motors thrust is mesured in lbs and outboards are measured in HP. Find perhaps a trolling motor with 300 lbs of thrust might come close. Just guessing. Pops

Answer 4

not sure it would have to be up there, a 3hp electric motor it pretty large and heavy, you would probably need more than one to equal a gas motor