Emax ECOII 3515 Motor – Pick Your KV, Pick Your Chaos

The Emax ECOII 3515 is not your average FPV motor—it’s a torque-loaded beast sized for cinelifters, long-range haulers, and heavyweight rigs. Available in 450KV, 550KV, 650KV, and 880KV, this motor series gives you the flexibility to match your voltage and prop size without praying to the magic smoke gods. Built on Emax’s ECOII platform, it’s efficient, affordable, and surprisingly smooth for something designed to haul cameras that cost more than your car.

Why You Want It

Whether you’re flying 8S cinematic rigs, 6S long-range explorers, or experimental Franken-drones, the ECOII 3515 lineup has a KV that fits. Strong stator design, efficient winding, and Emax reliability mean fewer mid-air funerals and more buttery footage. And yes, it’s still part of the ECO line—so you can build that monster rig without needing to remortgage your flat. (Wallet-wink: we like selling these in sets of four, hint hint.)

Specifications

• Stator Size: 3515 (big iron, big torque)
• KVs Available: 450KV / 550KV / 650KV / 880KV (choose wisely—voltage matters)
• Voltage Range: Supports 4–8S LiPo (depending on KV selection)
• Shaft: 5 mm (props stay on, crashes permitting)
• Mounting Pattern: 25×25 mm (cinelifter standard)
• Weight: ~70 g (hefty, but so is your GoPro + gimbal)

What’s in the Box*

• 1× Emax ECOII 3515 Motor (your KV of choice)
• Prop nut, screws, and mounting hardware

Disclaimer

You’ll always get the motor—screws, nuts, and washers may vary depending on which intern packed the box.

Still Here?

Okay, overthinker—if you’ve read this far, you already know the Emax ECOII 3515 is the right motor for your cine or long-range build. Pick your KV, grab a full set, and go film something worth bragging about. Or keep scrolling while your competition nails the job first.