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.
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.
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
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.
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.
