EMAX / ECO II series

ECO II 3210

The EMAX ECO II 3210 brushless motor brings four KV options to 8–10-inch multirotor builds. The 800KV and 900KV versions support 6–8S; the 1050KV and 1200KV versions are specified for 6S. Each shares a 99g-with-wire platform, 12N14P architecture, M5 propeller shaft and 19 × 19mm four-hole mount.

Tested output shown: 900KV with HQ8045 tri-blade at 31.3V on a static bench. Performance varies by propeller, voltage and build.

Weight99gWith 270mm wires

Power system6S–8SKV-dependent support

Propeller range8–10″KV-dependent recommendation

KV options4800 / 900 / 1050 / 1200KV

Designed for the build

The ECO II step into larger props.

A common 39.1mm-diameter platform lets you choose the winding for the power system rather than changing your mechanical footprint. Match the propeller, ESC and battery to the specific KV/voltage combination; the published 8–10-inch range applies to the motor family, not every variant.

ECO II 3210 KV guide: 800KV 6–8S, 900KV 6–8S, 1050KV 6S and 1200KV 6S with propeller ranges and individually labeled bench thrust

Swipe to explore all four KV options →

Each thrust figure is the maximum recorded in that version’s supplied load-test file. Different props and test voltages mean these are not direct head-to-head results.

Find your winding

Four KV options. One mounting footprint.

Voltage and propeller ranges come from the supplied specifications. The thrust figure on each card is the highest recorded in that KV’s supplied bench file, with its test voltage and propeller shown—not a same-condition comparison between variants.

800KV

Lower-KV choice with the broadest published propeller range.

Cells6–8S

Propeller8–10″

Resistance58mΩ

Recorded max thrust3,962g31.5V · GF8060 tri-blade

900KV

6–8S option for 8–9-inch multirotor configurations.

Cells6–8S

Propeller8–9″

Resistance52mΩ

Recorded max thrust4,378g31.3V · HQ8045 tri-blade

1050KV

6S choice with an 8–9-inch published propeller range.

Cells6S

Propeller8–9″

Resistance41mΩ

Recorded max thrust3,920g24.3V · GF9045 tri-blade

1200KV

Highest-KV option, specified for 6S and 8-inch props.

Cells6S

Propeller8″

Resistance35mΩ

Recorded max thrust4,181g24.3V · GF8040 tri-blade

Thrust is per motor, measured on a static test bench at full throttle. Test voltage, propeller, current and power differ by row; do not treat these figures as a controlled head-to-head KV ranking or a guaranteed in-flight result.

ECO II 3210 shared 99g motor platform with 19 by 19mm mount, 270mm leads, 39.1mm diameter and four voltage-specific KV options

Swipe to read the platform details →

Weight is 99g with wire. The shared mechanical platform is specified across 800KV, 900KV, 1050KV and 1200KV.

Motor anatomy

Fitment and construction, clearly marked.

The 3210 uses a steel M5 propeller shaft, ventilated anodized bell, multi-strand winding, precision bearing and a 19 × 19mm four-hole M3 mount. Its 270mm 18 AWG silicone leads leave room to route to the ESC.

12N14PMotor architecture

6mmBearing shaft

19 × 19mm4 × M3 mounting pattern

270mm18 AWG silicone leads

Annotated ECO II 3210 hardware: steel M5 shaft, ventilated rotor bell, multi-strand windings, precision bearing, 19 by 19mm four-hole mount and 270mm leads

Swipe to inspect the hardware callouts →

Specifications

Mechanical and electrical details.

Shared hardware specifications apply across all four KV choices. Electrical resistance and idle current change with the winding.

Shared mechanical specification

Motor dimensions	Ø39.1 × 45.8mm
Weight	99g, with wire
Framework	12N14P
Bearing shaft	6mm
Prop shaft	M5, clockwise thread
Mounting pattern	19 × 19mm, 4 × M3
Motor lead	270mm, 18 AWG silicone wire

By KV option

800KV	6–8S · 8–10″ prop · 58mΩ · 1.5A idle at 10V
900KV	6–8S · 8–9″ prop · 52mΩ · 1.6A idle at 10V
1050KV	6S · 8–9″ prop · 41mΩ · 1.9A idle at 10V
1200KV	6S · 8″ prop · 35mΩ · 2.4A idle at 10V

Measured performance

Bench results, with the conditions attached.

These are the highest-thrust full-throttle rows recorded for each KV in the supplied load-test workbooks. Current and power are input readings at the listed loaded voltage.

Motor	Propeller	Loaded voltage	Thrust	Current	Power	Speed
800KV	GF8060 tri-blade	31.5V	3,962g	56.12A	1,767.78W	18,737RPM
900KV	HQ8045 tri-blade	31.3V	4,378g	70.55A	2,208.22W	19,853RPM
1050KV	GF9045 tri-blade	24.3V	3,920g	77.90A	1,892.97W	17,180RPM
1200KV	GF8040 tri-blade	24.3V	4,181g	79.40A	1,929.42W	20,753RPM

Swipe table sideways for thrust, current, power and RPM →

Static test values are conditional on the listed propeller, voltage and test setup. The 800KV and 900KV rows above are from approximately 8S test voltage; the 1050KV and 1200KV rows are from approximately 6S test voltage. Actual output, temperature and endurance depend on the full build.

ECO II 3210 package with one motor, four M3 by 10mm screws and one aluminum M5 nylock nut

Swipe to read the package contents →

In the box

Motor and mounting hardware.

Each package includes one ECO II 3210 motor in the selected KV, four M3 × 10mm mounting screws and one aluminum M5 nylock nut. A propeller, ESC and battery are not listed as included.

EMAX ECO II 3210 brushless multirotor motor. Specifications and bench measurements transcribed from the supplied ECOII-3210 V1.0 basic-information, specification and KV load-test workbooks. Confirm propeller clearance, ESC capacity and thermal behavior in the completed aircraft. Graphics are based on an 800KV sample; shared hardware appearance is representative of the motor family.

EMAX ECO II 3210 Brushless Motor