The EMAX ECO II 3214 brushless motor brings four KV options to 8–10-inch multirotor builds. The 450KV version is specified for 12S, 800KV and 900KV for 6–8S, and 1050KV for 6S. Each shares a 132g-with-wire platform, 12N14P architecture, M5 propeller shaft and 19 × 19mm four-hole mount.
Tested output shown: 450KV with HQ1050 tri-blade at 47.5V on a static bench. Performance varies by propeller, voltage and build.
Weight132gWith 270mm wires
Power system6S–12SKV-dependent support
Propeller range8–10″KV-dependent recommendation
KV options4450 / 800 / 900 / 1050KV
Designed for the build
One mounting footprint. Four power systems.
The 39.1mm-diameter, 49.8mm-long platform lets you choose a winding for your voltage and propeller while retaining the same 19 × 19mm mount. Match the ESC and battery to the selected KV; the family-wide 8–10-inch propeller range does not apply to 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.
450KV
12S choice for the 9–10-inch propeller range.
Cells12S
Propeller9–10″
Resistance103mΩ
Recorded max thrust5,637g47.5V · HQ1050 tri-blade
800KV
6–8S option for 9–10-inch multirotor configurations.
Cells6–8S
Propeller9–10″
Resistance40mΩ
Recorded max thrust5,477g31.1V · HQ9050 tri-blade
900KV
6–8S choice with an 8–10-inch published propeller range.
Cells6–8S
Propeller8–10″
Resistance35mΩ
Recorded max thrust4,698g23.2V · HQ1050 tri-blade
1050KV
Highest-KV option, specified for 6S and 8–9-inch props.
Cells6S
Propeller8–9″
Resistance27mΩ
Recorded max thrust4,470g23.3V · GF9045 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 132g with wire. The shared mechanical platform is specified across 450KV, 800KV, 900KV and 1050KV.
Motor anatomy
Fitment and construction, clearly marked.
The 3214 uses a steel M5 propeller shaft, ventilated anodized bell, multi-strand winding, precision bearing and a 19 × 19mm four-hole M3 mount. Its 270mm 16 AWG silicone leads leave room to route to the ESC.
12N14PMotor architecture
6mmBearing shaft
19 × 19mm4 × M3 mounting pattern
270mm16 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 × 49.8mm
Weight
132g, with wire
Framework
12N14P
Bearing shaft
6mm
Prop shaft
M5, clockwise thread
Mounting pattern
19 × 19mm, 4 × M3
Motor lead
270mm, 16 AWG silicone wire
By KV option
450KV
12S · 9–10″ prop · 103mΩ · 0.9A idle at 10V
800KV
6–8S · 9–10″ prop · 40mΩ · 2.0A idle at 10V
900KV
6–8S · 8–10″ prop · 35mΩ · 2.2A idle at 10V
1050KV
6S · 8–9″ prop · 27mΩ · 2.8A 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
450KV
HQ1050 tri-blade
47.5V
5,637g
55.86A
2,653.35W
15,784RPM
800KV
HQ9050 tri-blade
31.1V
5,477g
87.26A
2,713.79W
17,720RPM
900KV
HQ1050 tri-blade
23.2V
4,698g
79.82A
1,851.82W
15,297RPM
1050KV
GF9045 tri-blade
23.3V
4,470g
86.29A
2,010.56W
18,222RPM
Swipe table sideways for thrust, current, power and RPM →
Static test values are conditional on the listed propeller, loaded voltage and test setup. The 450KV result was recorded at 47.5V (approximately 12S), the 800KV result at 31.1V (approximately 8S), and the 900KV and 1050KV results at 23.2V and 23.3V (approximately 6S). 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 3214 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 3214 brushless multirotor motor. Specifications and bench measurements transcribed from the supplied ECOII-3214 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 supplied 3214 product photos; shared hardware appearance is representative of the motor family.
