Emax ECOII-2004-2000KV Brushless Motor

The Emax ECOII-2004-2000KV is a high-performance brushless outrunner motor designed for FPV racing drones, quadcopters, and aerial photography platforms requiring efficient power delivery in the 250-450g weight class. Professional drone pilots and hobbyists rely on this motor for its exceptional thrust-to-weight ratio, low electromagnetic interference, and consistent RPM stability across varying battery voltage conditions. This motor solves the critical challenge of achieving maximum flight duration and responsive control authority while maintaining thermal stability during extended flight sessions and aggressive maneuvers.

Product Overview

The Emax ECOII-2004-2000KV brushless motor operates on the principle of electronically commutated three-phase AC induction using permanent neodymium magnets and copper windings. The 2000KV rating indicates the motor generates 2000 revolutions per minute for every volt applied, making it ideal for direct-drive propeller systems without gearing reduction. The ECOII series represents Emax's second-generation efficiency optimization, featuring improved stator design with reduced copper losses, optimized magnetic flux paths, and precision-balanced rotor construction that minimizes vibration and harmonic distortion.

The 2004 frame size denotes a 20mm stator diameter with 4mm shaft thickness, delivering approximately 250-300 grams of static thrust when paired with 5-inch propellers and 4S-6S LiPo batteries. The motor's outrunner configuration means the magnetic bell rotates around a stationary stator, enabling direct propeller mounting and eliminating gearbox complexity. Advanced thermal management through aluminum motor can construction and optimized air gap geometry ensures sustained performance during high-current draw scenarios typical in racing and acrobatic flight profiles.

Key Specifications

Specification	Details
Product Type	Brushless Outrunner Motor
Brand	Emax
Model	ECOII-2004
KV Rating	2000KV
Stator Size	20mm diameter
Shaft Diameter	4mm
Weight	approximately 33-35 grams
Recommended Voltage	4S-6S LiPo (14.8V-22.2V)
Maximum Current	30-35 Amperes continuous
Maximum Thrust	250-300 grams with 5-inch propellers
Internal Resistance	approximately 0.15 Ohms
Shaft Type	Direct drive with M3 propeller adapter
Winding Configuration	12N14P three-phase
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp

Key Features

• High-efficiency ECOII stator design with reduced copper losses delivers 15-20 percent more thrust-per-watt compared to first-generation brushless motors
• 2000KV rating optimized for 5-inch propeller systems on racing quadcopters, providing responsive acceleration and precise throttle control authority
• Low electromagnetic interference and minimal cogging torque ensure smooth power delivery and compatibility with digital ESC protocols including DShot and OneShot
• Precision-balanced rotor construction reduces vibration harmonics below 5 percent, critical for FPV camera stabilization and flight performance consistency
• Aluminum motor can with optimized cooling fins maintains thermal stability during 30-35 ampere continuous current draw across extended flight sessions
• M3 direct-drive shaft mounting eliminates gearbox complexity and mechanical losses, enabling efficient power transfer to propellers

Applications and Use Cases

• FPV racing drones and competitive quadcopter platforms requiring rapid acceleration, precise control response, and sustained high-current performance during aggressive aerial maneuvers
• Aerial photography and videography platforms in the 250-450 gram weight class needing balanced thrust delivery for smooth gimbal operation and stable hover characteristics
• Drone training and recreational flying applications where efficiency and thermal stability enable extended flight times on standard 4S-6S LiPo battery packs
• Robotics projects and multi-rotor experimental platforms requiring reliable brushless motor performance with low vibration and predictable RPM scaling across variable load conditions

How to Use

Before installation, verify motor rotation direction by connecting to a compatible ESC programmed in test mode, ensuring the bell rotates counterclockwise when viewed from the rear. Mount the motor securely using M3 mounting hardware to the drone frame, ensuring the shaft is perfectly perpendicular to the mounting surface to prevent propeller imbalance and vibration. Connect the three motor leads to the ESC output terminals in any configuration, then test rotation direction with the ESC calibration routine. If rotation is reversed, swap any two motor leads to correct the direction.

During initial operation, run the motor at low throttle for 30 seconds to verify smooth operation and confirm no mechanical binding or electrical faults. Monitor motor temperature during flight testing, ensuring the aluminum can remains warm but not excessively hot to the touch after 10-15 minute flights. Proper propeller balance and secure mounting are critical for optimal performance. Always use a compatible brushless ESC rated for 30+ amperes continuous current and program the throttle range correctly to prevent over-current conditions that could damage the motor windings.

Frequently Asked Questions

What is the difference between 2000KV and other KV ratings for brushless motors?

KV rating directly correlates RPM to applied voltage. A 2000KV motor spins at 2000 RPM per volt, so on a 6S battery (22.2V), it reaches approximately 44,400 RPM. Higher KV motors spin faster but generate less torque, making them suitable for smaller propellers and lightweight aircraft. The 2000KV rating is optimized for 5-inch propellers on racing and acrobatic quadcopters. Lower KV motors like 1200KV or 1500KV are better for heavier platforms with larger propellers requiring higher torque output.

Can I use this motor on a 3S battery or only 4S-6S?

While the ECOII-2004-2000KV can technically operate on 3S batteries (11.1V), it is not recommended. On 3S, the motor produces only 22,200 RPM maximum, insufficient thrust for most quadcopter configurations. The motor is specifically designed and tested for 4S-6S voltage ranges where it delivers optimal efficiency and thermal characteristics. Using it on 3S will result in poor flight performance, insufficient lift, and potential instability. Always use the recommended voltage range for optimal safety and performance.

How do I know if my motor is damaged or needs replacement?

Signs of motor damage include visible cracks in the aluminum can, bent or twisted shaft, grinding or rattling sounds during operation, inconsistent RPM response to throttle input, or excessive heat generation within 5 minutes of flight. You can test motor health by connecting to an ESC in test mode and manually spinning the shaft by hand. It should rotate smoothly without resistance or grinding. If the motor fails to spin freely or exhibits any of these symptoms, contact our support team within 7 days of purchase for replacement under warranty.

What ESC should I pair with the ECOII-2004-2000KV motor?

Use a brushless ESC rated for minimum 30 amperes continuous current, such as Emax BLHELI-S 30A, Hobbywing XRotor 30A, or equivalent models supporting DShot protocol. The ESC must be programmed with correct throttle calibration and motor direction configuration before flight. Ensure the ESC has adequate heat dissipation and is mounted away from direct motor heat. Never use an ESC rated below 25 amperes, as it will overheat and potentially fail during high-demand flight scenarios.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy Emax ECOII-2004-2000KV Brushless Motor Online in India

Purchase the Emax ECOII-2004-2000KV Brushless Motor online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Emax ECOII-2004-2000KV Brushless Motor with fast shipping and expert support.

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