EcoPower WP173 Aluminum Digital Micro Servo (HV) (Waterproof) for ARRMA™ Groms, Losi™ NASCAR & other Mini vehicles
About this part
The Ultimate High-Performance Mini Servo
Introducing the EcoPower WP173 Aluminum Digital Micro Servo, a high-voltage servo designed for use with 1/16 and 1/18 scale models like Traxxas®, Axial®, Losi®, and all of the Arrma® Grom™ 1/18 platforms. This servo is also compatible with the Traxxas TRX-4M™ when equipped with the EcoPower CNC-Machined Aluminum Servo Mount (ECP-3072) available separately. Engineered for durability and precision, this servo is equipped with high strength, high voltage, high torque, and high-speed capabilities. Its robust design features a full metal gear ball bearing, waterproof construction, and an aluminum case, making it a reliable choice for a wide range of demanding applications. Lifetime Gear Warranty through Amain Hobbies for added confidence and durability.
About the WP173 Servo
High Performance
The WP173 servo offers exceptional performance with high torque and high-speed operation. At 6 volts, it delivers an operating speed of 0.09 seconds per 60°, while at 8.4 volts, the speed increases to an impressive 0.07 seconds per 60°. This rapid response time ensures precise control, making it ideal for competitive racing or complex maneuvers. With dynamic torque ranging from 123 ounces per inch at 6 volts to 173 ounces per inch at 8.4 volts, this servo is more than capable of handling the toughest tasks.
Durable Construction
Built to last, the WP173 features full metal gear ball bearings and a waterproof aluminum case, ensuring it can withstand harsh environments and heavy use. The all-metal gear train provides the strength needed to resist wear and tear, while the waterproof design protects the servo's internal components from moisture and dust. The addition of an aluminum servo horn further enhances its durability and reliability.
Wide Compatibility
Designed for versatility, the WP173 operates within a wide voltage range of 6 to 8.4 volts, making it compatible with a variety of RC models. Its twenty-five-tooth, five-millimeter diameter output shaft is standard, allowing for easy integration with most setups. Whether you're upgrading an existing model or starting to build one, this servo is an excellent choice for those requiring high performance in a compact size.
Features:
- Lifetime Gear Warranty Backed by Amain Hobbies
- High torque and high speed
- Full metal gear ball bearing
- Waterproof aluminum case
- Aluminum servo horn included
- Compatible with most 1/16 and 1/18 scale models
- Powerful coreless motor for efficient operation
- Wide operating voltage range from 6 volts to 8.4 volts
- Standard twenty-five tooth output shaft
- Aluminum case maintains a lightweight profile
- Dynamic torque range for ultimate performance
Includes:
- (1) Lifetime Gear Warranty
- (1) WP173 Aluminum Digital Micro Servo
- (1) Aluminum Servo Horn
- (2) Composite Servo Horns
- Mounting Hardware
Specifications:
| Application | 1/24, 1/16 & 1/18 |
|---|---|
| Input Voltage | 6V-8.4V |
| Speed | |
| @6.0V: | 0.09 sec/60° |
| @8.4V: | 0.07 sec/60° |
| Torque: | |
| @6.0V: | 123oz.in (8.9Kg-cm) |
| @8.4V: | 173oz.in (12.5Kg-cm) |
| Motor | Digital Coreless |
| Output Shaft | Mini 25T |
| Shaft Diameter | 0.20in (5mm) |
| Gear Material | Metal w/Lifetime Gear Warranty |
| Dimensions (LxWxH) | 0.9x0.47x1.25in (23x12x31.75mm) |
| Weight | 0.81oz (23g) |
*Tech Note: While this servo is compatible with most 1/18 and 1/16 scale vehicles, when using it for the Traxxas TRX-4M 1/18 platforms, the EcoPower CNC-Machined Aluminum Servo Mount (ECP-3072) must be equipped for a precise fit on these specific models.
**Tech Note: Do not exceed 8.4 volts as it may damage the servo.
***Tech Note: Although this servo is waterproof, submerging it under water for longer periods may degrade and decay the seal points.
CA Residents Prop 65 Warning
WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...Reviews2.6 · 14 reviews
I purchased one of these servos for my new Typhon Grom BLX because of my experience with other EcoPower servos. The difference between the stock Grom servos and the ECP-173 is night and day. It has the speed and ability to return the tires to center where as the stock one you have to over correct to return them to center. Especially if you are running Proline Badlands. I just purchased one for my Mojave Grom BLX as well.
The worst designed servo horn screw ever! The screw mounting the servo horn to the 25t spline is M2.3 (measured to 2.25mm). Why couldn't the use a universal size like M2 or M2.5? This is a complete waste of money if you planned to replace the screw to different servo horn.
Solid servo. Powerful and quiet. I used this in a heavy trx4m that likes to strip servos and it seems to be holding up well.
Gears stripped 5mins in while running on dirt. I wasn't taking out to bash i was testing it after replacing the gears inside ( i stripped it initially). I usually don't put servo savers but I’m not even sure that will help. Look some where else! Was running on a arrma mojave grom .
Bad right out of the box. Would not center and had a death wobble when it tried.
Reviews are sharply split. Several owners praise the servo's power, speed and ability to return steering to centre, particularly on Grom-class vehicles, and some report long-term durability in demanding applications. Other reviewers report stripped gears within minutes of running, servos failing soon after purchase, and units that would not centre or twitched out of the box. One reviewer criticised the non-standard M2.3 horn screw, which limits replacement options. Failure reports come from a mix of Grom and 1/18 applications, and several are from buyers whose return windows had closed. The pattern of early failures and out-of-box faults is the most consistent concern, while performance praise is also common.
- + Strong power and fast centring
- + Quiet operation
- + Good durability for some owners
- + Works well on Grom-class vehicles
- − Gears strip within minutes for several owners
- − Units faulty out of the box
- − Servo fails shortly after purchase
- − Non-standard M2.3 horn screw