Eachine Tyro 99 Motor Replacement

Introduction

In this guide, you will learn how to replace the motor on an Eachine Tyro99 racing drone.

The magnets in the motor can attract metal shavings and other FOD, and if the motors continue running in this state, they can break. Here’s how you can fix it!

You’ll need a soldering iron, solder, a 1.5mm allen (hex) wrench, electrical pliers, and a utility or hobby knife.

The steps will guide you through removing the defective motor. Step 5 requires that you solder several wires together. From there, you’ll install the new motor.

Remember to remove the propellers before testing any of the motors.

What you need

Step 1 Motor

Eachine Tyro 99 Motor Replacement, Motor: step 1, image 1 of 1

Unbolt the propellers.
You'll need to turn the nut to the left if the nut is silver. If the nut is black, you'll need to turn it to the right to loosen it.

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Step 2

Cut off the electrical tape or heat shrink wrap attaching the wires to the drone's arm.
Cut away from yourself, and keep your fingers out of the way. Carefully cut off the tape without damaging the wires.

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Step 3

Using the 1.5mm hex wrench, remove the three 6.0mm bolts holding the motor on to the arm.

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Step 4

Eachine Tyro 99 Motor Replacement: step 4, image 3 of 3

Cut and strip the wires attached to the motor. Cut the wires at around the halfway point between the motor and the ESC.
Strip the wires with electrical pliers, exposing around 1/4" of bare wire.
Strip the wires on the replacement motor.

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Step 5

Eachine Tyro 99 Motor Replacement: step 5, image 3 of 3

Solder the motor's wires to the wires you just stripped. The wires don't need to be arranged in any particular order.
Cover the joints with electrical tape or heat-shrink tubing.
Soldering irons are hot! Don't burn yourself. More importantly, don't use solder that contains lead; the fumes can be dangerous.
For more tips and information on soldering wires and connections, please visit the How to Solder and Desolder Connections guide.

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Step 6

Using the 1.5 mm hex wrench, attach the new motor with the 6.0mm screws you removed earlier.

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Step 7

Wrap the wires to the drone's arm with tape.
This will prevent the wires from hitting the propeller.

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Step 8

Test the motor to ensure it runs in the correct direction. You can use ESC programming software to reverse the direction if necessary.
Bolt on the propeller. The silver nuts will need to be turned clockwise to tighten; the black nuts are reversed.

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Conclusion

Your new motor should be correctly installed now! Be sure to initially test it with the propeller detached; I’ve injured myself by carelessly testing this very drone.