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Replacement shafts are available separately.  Order EFLM40251 for a Power 25 BL Outrunner shaft. 
 

Operating Instructions: 

1. 

This brushless motor requires the use of a sensorless brushless speed control.  Failure to use the correct speed control may result in 
damage to the motor and/or speed control. 

2. 

When mounting the motor, be sure the correct length of screws are used so damage to the inside of the motor will not occur.  We suggest 
you use the mounting hardware included with your motor.  

The use of long screws will damage the motor.

 

3. 

You may connect the three motor wires directly to the controller with solder or use connectors such as gold plated brushless bullet 
connectors (EFLA241), which will also need to be soldered properly to your wires.  The three motor wires can be connected in any order 
to the three output wires or output port on a sensorless brushless speed control.  Be sure to use heat shrink tubing to properly insulate the 
wires so the wires will not short.  Shorting may damage the motor and speed control. 

4. 

If you add connectors and you no longer wish to use them, never cut the motor wires.  Remove them by properly desoldering them.  
Shortening the motor wires is considered an improper modification of the motor and may cause the motor to fail. 

5. 

When you connect the motor to the esc, check the rotation direction of the motor.  If you find the rotation is reversed, 

switching any two 

motor wires will reverse the direction so the motor rotates properly

6. 

Proper cooling of the motor is very important during operation.  New technology has brought much higher capacity batteries with higher 
discharge rates, which can cause extreme motor temperatures during operation.  It is the responsibility of the user to monitor the 
temperature and prevent overheating.  Overheating of the motor is not covered under any warranty. 

7. 

You can install the propeller on the motor shaft after you have confirmed proper rotation direction. Also consult the instruction included 
with your sensorless electronic speed control for proper adjustments and timing.   

8. 

Once the battery is connected to the motor, please use extreme caution.  Stay clear of the rotating propeller since spinning propellers are 
very dangerous as the motors produce high amounts of torque. 

9. 

Never disassemble the motor.  This will void any warranty. 

 

Safety Precautions: 

This is a sophisticated hobby product and not a toy. It must be operated with caution and common sense and requires some basic mechanical 
ability. Failure to operate this product in a safe and responsible manner could result in injury or damage to the product or other property. 

This 

product is not intended for use by children without direct adult supervision.  The Outrunner motor case is a rotating part so use extreme 
caution.  

Please read the warning information included with your propellers for safety information related to the operation of motors with propellers. 

Failure to comply with these warnings and/or improper use of propellers may result in serious injury. 

 
Installation: 

 

 

 

NOTE:  

Photo shows typical installation of motor and x-mount directly to the outside of the firewall.  There are other options available including 

mounting the motor inside the fuselage (requires reversing the shaft direction) or extending the motor further forward using aftermarket mount 
extensions when using cowls. 
 

1. 

You can first trial fit the aluminum x-mount against the front of the firewall and use a Sharpie® to mark the locations of four holes and drill 
appropriate size hole to fit the blind nuts provided.  Always be sure to maintain the proper thrust line and account for adequate 
prop/spinner clearance. 

2. 

Attach aluminum x-mount to the outrunner motor using the four flat head (countersunk) screws provided with the motor. 

3. 

Install four blind nuts on the inside of the firewall. 

4. 

Attached the aluminum x-mount and motor to the outside of the firewall using the four socket head cap screws and washers. 

 
 

Limited Warranty Period 

Horizon Hobby, Inc. guarantees this product to be free from defects in both material and workmanship for a period of 1 year from the date of 
purchase. 
 

Limited Warranty & Limits of Liability 

Pursuant to this Limited Warranty, Horizon Hobby, Inc. will, at its option, (i) repair or (ii) replace, any product determined by Horizon Hobby, Inc. to 
be defective.  

In the event of a defect, these are your exclusive remedies. 

 

This warranty does not cover cosmetic damage or damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or 
modification of, or to any part of the Product.  This warranty does not cover damage due to improper installation, operation, 
maintenance, or attempted repair by anyone other than an authorized Horizon Hobby, Inc. service center. This warranty is limited to the 
original purchaser and is not transferable.  In no case shall Horizon Hobby’s liability exceed the original cost of the purchased product 
and will not cover consequential, incidental or collateral damage. Horizon Hobby, Inc. reserves the right to inspect any and all equipment 
involved in a warranty claim.  Repair or replacement decisions are at the sole discretion of Horizon Hobby, Inc.  Further, Horizon Hobby 
reserves the right to change or modify this warranty without notice. 
 
 

All manuals and user guides at all-guides.com

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