How do you measure an electric motor shaft?

Measure down from the mounting surface of the transom or bow to the water level. Add 5″ to waterline measurement for fishing in rough water. Add 12″ to waterline measurement for steering a hand control motor while standing. Use this measurement and the tables below to find the appropriate shaft length.

How is engine shaft current measured?

All current is driven by voltage. You can measure the voltage across the bearing by measuring the voltage difference between the motor shaft and frame, a.k.a. the shaft voltage. You can indirectly measure bearing current by looking for sudden collapses in shaft voltage.

What size electric motor do I need for my boat?

General rule of thumb: you need at least 2 lbs. of thrust for every 100 lbs. of fully-loaded boat weight (people and gear included). If things like wind or current are major factors where you fish, you’ll want a little extra thrust.

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Can a trolling motor shaft be too long?

If the shaft ends up being a bit too long, you can always adjust the shaft depth upward with the depth collar adjustment found on nearly all trolling motors. But if you pick a shaft that’s too short, you’re simply out of luck.

How long should a trolling motor shaft be on a pontoon boat?

In short, you probably want a 60″ (152.4 centimeter) shaft for your trolling motor if you plan to mount your trolling motor on the bow of your pontoon boat, but there are certainly many things to be considered before applying that general rule.

What is shaft grounding?

Shaft grounding devices minimize shaft voltage and prevent current damage. … Shaft groundings stop the energy from causing harm to vulnerable motor parts. These devices redirect electrical current away from sensitive motor parts with weaker resistances—such as motor bearings—and provide a better route to the ground.

How big of a boat can a trolling motor push?

Boat weight is the most important consideration to take into account when choosing a trolling motor. A beginning rule of thumb is that you want a minimum of 2 lbs of thrust for every 100lbs. For example, if you have a 3000lb boat, fully loaded, then the calculation is (3000/100) * 2 = 60lbs of thrust.

How long do electric boat motors last?

The larger the rating, the more power the battery can hold, and the longer it will be able to power a motor at a given speed. For example, a 100 amperage hour battery is one that would be able to supply 25 amps of power for 4 hours (25 amps * 4 hours = 100 amp hours) before running out of energy.

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How fast do electric boat motors go?

5 mph

How deep should a trolling motor be in the water?


Can I shorten the shaft on my trolling motor?

Yes, in some cases but to maintain the warranty on your motor we recommend it be done by an Authorized Minn Kota Repair Center. Some models cannot have the shafts shortened.

How long should a trolling motor shaft be?

For a rough shaft length estimate for bow motors, measure the distance from the top of your bow to the waterline and add about 18 inches. For transom motors, shaft length is generally between 30″ to 42″, depending on boat length. Where you usually fish will also play a role in determining which motor is best for you.

How fast will a 30 lb thrust trolling motor go?

with a sinlge 30# transom mounted motor i was able to reach 3.0 mph. if i went dual 30# tms, i could reach 3.2 mph. with a single 50# transom mounted motor i was able to reach 3.6 mph. i will be picking up a 55# thrust minn kota soon.

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

The right sized trolling motor for a 20-foot pontoon boat is… The answer is quite simply nothing that has less than 70 pounds of thrust, and if you can afford it, go for 80 pounds of thrust.

What size battery do I need for a trolling motor?

Most trolling motor batteries fail due to lack of proper charging. We suggest selecting a 12 volt deep cycle marine battery with at least a 110 amp hour rating, usually a group 27 size battery. The higher the amp hour rating, the more run time you will receive.

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