How To Size Trolling Motor For Boat?

The weight of the boat is the most important factor to consider when selecting a motor. If you want a minimum of 2 lbs of thrust for every 100 lbs, you should start with 2 lbs. If you have a 3000lb boat that is fully loaded, the calculation is (3000/100) which is 60 lbs of thrust.

What size trolling motor do I need for a 20 foot boat?

It’s best to have a 36v 56′′ shaft with 100 lbs of thrust for larger bass boats. The bigger the boat, the more room it has for deep cycle batteries and the more power it has to control it.

Is a 55lb trolling motor enough?

You’re definitely looking at investing in a 55lb thrust motor on a large vessel. It’s a good idea to go up from there if you’re going to move against a current or if you’re going to be out on saltwater.

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How do you measure a boat for a trolling motor?

To get the correct shaft length for your boat, you need to measure the distance from the transom to the waterline. Add 20” to the measurement to get the shaft length you want. If you’re stuck between two sizes, go for the bigger one.

Will a 24v trolling motor run longer than a 12v?

The run time of a 24v motor is twice as long as that of a 12v motor. This is due to the fact that they have a significantly lower draw on the Amps and are mostly used at a lower setting.

How long will a 55 lb thrust trolling motor run?

A marine battery can last up to five hours. The age and condition of the battery is one of the factors that can affect this.

How fast will a 40 lb thrust trolling motor go?

You will need the larger-sized motor when you have a larger boat, even though the 30lb, 40lb, and 55lb thrust trolling motors all top out at 5 miles per hour. If you don’t, your boat won’t be able to hit anything.


How many HP is a 55lb thrust trolling motor?

The Newport Vessels 55lb thrust trolling motor is rated as 622 watt at the highest forward speed and so 624/746 is roughly equivalent to a 0.84hp motor.

What size battery do I need for a 55 lb thrust trolling motor?

If you were to use a 55lb thrust motor for two hours at full speed, you would need a battery with a 100 to 120Ah rating.

How deep should I run my trolling motor?

6 inches of water above the blades is what the trolly motor’s ideal propeller should keep. The centerline of the motor and prop shaft should be at least 12 to 18 inches below the waterline.

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How many pounds of thrust do I need for a trolling motor?

The thrust needs to be at least 2 lbs. for every 100 lbs. of fully loaded boat weight. If the wind or current is a big factor in where you fish, you’ll want to increase your thrust.

How deep should the Minn Kota be?

The top of the motor should be submerged at least 12 inches under the water in order to ensure adequate power and to prevent noisy cavitation which will scare fish.

What happens if you run a 24 volt trolling motor on 12 volts?

Your motor will not be hurt by it. Most newer ones won’t turn over because the circuit board doesn’t sense 24v. You will have less power than the old ones.


How many amp hours do I need for a 24 volt trolling motor?

The chart below shows how a 24v setting will draw more power than a 36v setting.

Does a 24 volt trolling motor need 2 batteries?

Smaller and medium trolling motors use a single 12v marine battery, while larger ones use larger 24v and 36v systems, and need 2 or 3 marine batteries.

How many pound trolling motor do I need?

When the boat is full of fuel, people, tackle, etc., we recommend selecting a motor that has at least 2 lbs. of thrust for every 100 lbs.

What is the highest thrust 12 volt trolling motor?

The most powerful trolling motors offer more than 100lb. of thrust, which is powerful enough to move heavy vessels. The maximum thrust is between 12V/55lb. and 24V/80lb.