How to determine trolling motor shaft length

Add 12 to waterline measurement for steering a hand control motor while standing. Posted January 25 2018.

Place the trolling motor on the ground.

How to determine trolling motor shaft length. Adhere to the following steps to measure your motors shaft length. Place the trolling motor on the ground. Determine the motor shafts length.

Use a tape measure and determine the motor shafts length by measuring from the base of the head down to the propeller housing in inches. Steps to measure transom or bow height. 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 trolling motor shaft length.

Bow to Water Line 20 Minimum Required Shaft Length. Bow to Water Line 25 Minimum Required Shaft Length Transom Mount Shaft Length. Shaft length on transom mount motors is less critical than on bow mount motors but is still important to double-check.

Trolling Motor Shaft Length Measurement Tips. How Can You Measure Trolling Motor Shaft Length. Measuring the shaft length is not that difficult.

The first thing you have to do is put the motor on the ground and find out its shaft length. You can do that by using a tape measure and do the measurements starting from the base of the head and going down to the propeller housing. To measure the shaft length for transom motors measure the distance from the mounting location or spot down to the waterline and you can choose it according to the below measurements.

If the distance between the transom mount to the waterline is 0 to 10 choose a 30-inch shaft length. Shaft Length for Engine Mount Motors. Engine mount trolling motors are fixed to the cavitation plate of outboard motors.

Before you buy the trolling motor you should check if the plate is deep enough under the waterline. There should be a minimum of 13 inches of submersion for the trolling motor to function correctly. In other words the centerline of the motor and the prop shaft should be about 12-18 inches below the waterline depending on the make model and dimensions of the trolling motor.

To calculate the ideal shaft length for your boat select the point on the transom or bow where the motor will be mounted then measure down to the waterline. Shaft length is of key importance because choosing the incorrect length can cause your trolling motor to cavitate and lose thrust. To get the correct length if you have a transom trolling motor the general rule is that the top part of the motor should be submerged 12 inches in the water.

Posted January 25 2018. 45 is standard shaft length for glass bass boats with standard freeboard height like yours. If the waves get over 18 you wouldnt be able to stand and operate the TM big boat wakes may pull the prop out depending how high you adjust motor.

Identify the length of the trolling motor shaft. This one is on the opposite side of the bar. It extends from the top of the mounting bracket to the cavitation plate.

Using a tape measure measure the length of the trolling motor shaft. Note this in inches. Identify the transom of your boat which is at the back.

Also how long should the shaft be on my trolling motor. The standard shaft length is 42. To determine the right length for your boat measure the distance from where the shaft is mounted on the deck or the transom to the water.

Then add 16 for MotorGuide or 20 for Minn Kota and select the next closest measurement. The shaft length on a trolling motor is measured from the base of the motor head down the the top of the motor compartment. TRANSOM MOUNT MOTORS In order to get the correct shaft length needed for your boat you first have to measure the distance from the mounting spot on the transom down to the waterline.

To measure your outboard motor shaft length measure from the bottom of the mounting bracket where it rests on the transom to the top of the cavitation plate this is the horizontal surface of the lower unit immediately above the propeller. Later in the article is an image that shows you exactly where to measure. To determine the shaft length a trolling motor needs to be to fit the various sizes of boats measure the distance from the surface of the water to where the trolling motor will be mounted.

Adding 18 to 24 inches to this total then rounding to the nearest foot tells you the necessary shaft length. Last year I bought a Minn Kota powerdrive trolling motor with a 60 shaft. I bought a new boat this spring and the shaft length on this trolling motor is just too long for my new boat.

If I put the shaft down all the way it is too deep and if I raise it up the shaft and motor. Generally speaking the average shaft length for a trolling motor is around 60 or 152cm if you intend on mounting the motor on the bow of your boat. While this is a good rule of thumb there are other things to consider when determining this length.

If you really want to play it safe you can choose a 48 shaft for your trolling motor. I am trying to determine what length shaft I need for a bow mount I Pilot Trolling motor without putting the boat in the water. I pick up my 2019 219FS on December 27th.

Anxious to get all the goodies ordered. FreddieB Sent from my SM-N950U using Tapatalk. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features Press Copyright Contact us Creators.

TROLLING MOTORS To measure the shaft length on a trolling motor you will need to measure from the bottom of the motor head to the top of the propeller housing. This length may vary by an inch or two but round to the nearest even number to get the motors rated shaft length. To determine the recommended shaft length measure down from the mounting surface of your boat to the the waterline.

For rough water conditions add 5 to the waterline measurement. Bow to Waterline Recommended Shaft Length 0 -10 36 16 -22 42 -45 22 -28 48 -52 28 -34 54 -62.