Q: What propellers and batteries are compatible with the EMAX ECO II 3115 motor?

A: The ECO II 3115 motor supports 9–12 inch propellers and offers multiple KV options: 400KV / 500KV: Best with 10–12S LiPo; 640KV: Ideal for 6–8S LiPo; 900KV: Suitable for 4–6S LiPo. Perfect for long-range, heavy-lift, and cinematic drone setups.

Q: How does the EMAX ECO II 3115 compare to premium motors like T-Motor or iFlight?

A: While more affordable, the ECO II 3115 still delivers impressive thrust, efficiency, and durability. With N52SH arc magnets and NSK bearings, it’s a reliable high-performance option and a cost-effective alternative to premium brands.

Q: What types of FPV drones is the EMAX ECO II 3115 motor suitable for?

A: It’s ideal for CineLifters, long-range cruisers, and heavy-lift drones, especially those using 9–12" propellers. Great for aerial cinematography, payload flying, and endurance missions.

emax ecoii3115 400kv 500kv 640kv 800kv 900kv motor for fpv racing drone

NEWEmax ECOII3115 400KV / 500KV / 640KV / 800KV / 900KV Brushless Motor for FPV Racing Drone

About EMAX ECO II 3115 Motor:

The EMAX ECO II 3115 Motor delivers reliable, high-performance power with KV options (400KV, 500KV, 640KV, 900KV) to suit diverse drone setups. Its durable design and advanced cooling ensure efficiency and longevity, making it a versatile choice for upgrades or new builds.

5.0

Sales：12Pcs

$35.44

~~$39.90~~

-11%

● Large stator size for powerful thrust: Ideal for 9–12" props and heavy-lift builds.

● Multiple KV options: 400KV to 900KV, tailored for various flight needs.

● High efficiency with premium magnets: Faster response and smoother control.

● Durable and crash-resistant: Reinforced bell design and precision bearings.

● Excellent value: Performance close to premium motors at a lower price.

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Options (5)

400KV

500KV

640KV

800KV

900KV

Quantity

In Stock Expected ship within 5 days after order.

Free Shipping | For order over $99

2 Years Warranty | Hassle-free 24-month warranty

Easy Return and Exchange | Return within 30 days

Professional Support | 24-hour response

Payment | Every order you place with us is safe & secure

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Reviews (3)

J*********n

Been using the 640KV version for a mid-range cruiser setup. The build quality is excellent for the price. It’s not the most premium motor I’ve used, but it’s definitely reliable and smooth. Great value for weekend flyers and film hobbyists.
Image Ratio：640KV
M************r

Ich war skeptisch, ob ein so preisgünstiger Motor mit meinen T-Motors mithalten kann – aber ich wurde positiv überrascht. Der ECO II 3115 läuft sauber, leise und effizient auf meinem Langstreckenrig mit 10" Propellern. Für den Preis unschlagbar.
Image Ratio：900KV
D************n

I've been flying heavy-lift cine drones for years, and the ECO II 3115 has truly surprised me. The power-to-weight ratio is excellent, and I love that it holds up well on 12S builds without overheating. Definitely a solid choice if you're looking for performance on a budget.
Image Ratio：400KV

NEWEmax ECOII3115 400KV / 500KV / 640KV / 800KV / 900KV Brushless Motor for FPV Racing Drone

About EMAX ECO II 3115 Motor:

Powerful Thrust for Heavy-Lift Applications

Versatile KV Range for Different Setups

High-Efficiency Magnetic Design

Durable Construction for Real-World Flying

Precision Manufacturing for Flight Stability