EMAX / ECO II series

ECO II 3214

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.

EMAX ECO II 3214 motor: four KV options, tested output up to 5.637kg with 450KV at 47.5V, 12N14P and 39.1mm diameter

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.

ECO II 3214 KV guide: 450KV 12S, 800KV and 900KV 6–8S, and 1050KV 6S, with propeller ranges and separately labeled bench thrust

Swipe to explore all four KV options →

Find your winding

Four KV options. One mounting footprint.

Voltage, propeller range and winding resistance vary by KV. Choose the option that matches your battery, propeller and ESC setup.

450KV

12S choice for the 9–10-inch propeller range.

Cells12S

Propeller9–10″

Resistance103mΩ

800KV

6–8S option for 9–10-inch multirotor configurations.

Cells6–8S

Propeller9–10″

Resistance40mΩ

900KV

6–8S choice with an 8–10-inch published propeller range.

Cells6–8S

Propeller8–10″

Resistance35mΩ

1050KV

Highest-KV option, specified for 6S and 8–9-inch props.

Cells6S

Propeller8–9″

Resistance27mΩ

ECO II 3214 shared 132g motor platform with 19 by 19mm mount, 270mm 16 AWG leads, 39.1mm diameter, 49.8mm length and four KV options

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

Annotated ECO II 3214 hardware: steel M5 shaft, ventilated rotor bell, multi-strand windings, precision bearing, 19 by 19mm four-hole mount and 270mm 16 AWG 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

Full load-test data by KV and propeller.

The following measurements are from EMAX load-test records. Results may vary with battery, propeller, environment, and installation conditions.

450KV

Battery cells12S

Recommended prop9"-10"

Idle current0.9A @ 10V

Resistance103mΩ

Peak current (spec)55.9A

Max power (spec)2653W

HQ9050 3-blade propeller

ECO II 3214 Brushless Motor 450KV — HQ9050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
48	1.94	547	93.1	5.87	6055	30
48	3.56	896	170.9	5.24	7550	40
48	6.45	1404	309.6	4.53	9354	50
47.9	10.68	1993	511.6	3.90	11141	60
47.8	16.46	2657	786.8	3.38	12844	70
47.8	23.75	3336	1135.2	2.94	14343	80
47.7	32.76	4061	1562.7	2.60	15708	90
47.6	44.57	4838	2121.5	2.28	17031	100

HQ1050 3-blade propeller

ECO II 3214 Brushless Motor 450KV — HQ1050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
48	2.06	581	98.9	5.88	5548	30
48	4.35	1070	208.8	5.12	7344	40
48	8.05	1706	386.4	4.42	9102	50
47.9	13.57	2429	650.0	3.74	10774	60
47.8	20.93	3220	1000.5	3.22	12360	70
47.7	30.05	4068	1433.4	2.84	13652	80
47.6	40.69	4823	1936.8	2.49	14763	90
47.5	55.86	5637	2653.3	2.12	15784	100

GF1050 3-blade propeller

ECO II 3214 Brushless Motor 450KV — GF1050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
48	2.02	574	97.0	5.92	5621	30
48	4.19	1061	201.1	5.28	7388	40
48	7.7	1683	369.6	4.55	9264	50
47.9	12.86	2382	616.0	3.87	10884	60
47.8	19.5	3111	932.1	3.34	12552	70
47.7	27.67	3887	1319.9	2.95	13938	80
47.6	37.41	4621	1780.7	2.60	15201	90
47.5	48.62	5324	2309.4	2.31	16266	100

800KV

Battery cells6-8S

Recommended prop9"-10"

Idle current2.0A @ 10V

Resistance40mΩ

Peak current (spec)87.3A

Max power (spec)2714W

GF9045 3-blade propeller

ECO II 3214 Brushless Motor 800KV — GF9045 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
32	3.76	568	120.3	4.72	6955	30
32	6.53	935	209.0	4.47	8574	40
31.9	11.41	1449	364.0	3.98	10548	50
31.8	19.04	2108	605.5	3.48	12621	60
31.7	28.36	2750	899.0	3.06	14438	70
31.6	40.5	3455	1279.8	2.70	16107	80
31.5	55.69	4126	1754.2	2.35	17658	90
31.3	74.53	4846	2332.8	2.08	19127	100

HQ9050 3-blade propeller

ECO II 3214 Brushless Motor 800KV — HQ9050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
32	3.92	649	125.4	5.17	6621	30
32	7.7	1131	246.4	4.59	8461	40
31.9	13.9	1726	443.4	3.89	10434	50
31.8	23.46	2464	746.0	3.30	12377	60
31.7	35.15	3210	1114.3	2.88	14011	70
31.5	49.66	3986	1564.3	2.55	15464	80
31.3	67.49	4746	2112.4	2.25	16672	90
31.1	87.26	5477	2713.8	2.02	17720	100

HQ1050 3-blade propeller

ECO II 3214 Brushless Motor 800KV — HQ1050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
25	3.03	481	75.8	6.35	5007	30
24.9	6.4	901	159.4	5.65	6594	40
24.9	11.44	1372	284.9	4.82	8129	50
24.8	19.05	1962	472.4	4.15	9643	60
24.7	28.88	2580	713.3	3.62	11017	70
24.6	41.19	3222	1013.3	3.18	12262	80
24.5	55.74	3886	1365.6	2.85	13349	90
24.3	73.19	4716	1778.5	2.65	14320	100

AVIA1050 3-blade propeller

ECO II 3214 Brushless Motor 800KV — AVIA1050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
25	3	424	75.0	5.65	4985	30
25	5.89	784	147.2	5.32	6496	40
24.9	10.61	1241	264.2	4.70	8026	50
24.8	17.52	1850	434.5	4.26	9557	60
24.8	26.53	2449	657.9	3.72	10924	70
24.6	38.01	3129	935.0	3.35	12219	80
24.5	51.69	3789	1266.4	2.99	13392	90
24.3	67.63	4523	1643.4	2.75	14453	100

900KV

Battery cells6-8S

Recommended prop8"-10"

Idle current2.2A @ 10V

Resistance35mΩ

Peak current (spec)87.9A

Max power (spec)2672W

HQ9050 3-blade propeller

ECO II 3214 Brushless Motor 900KV — HQ9050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
25	3.87	512	96.8	5.29	5943	30
24.9	7.15	860	178.0	4.83	7464	40
24.9	12.67	1329	315.5	4.21	9215	50
24.8	20.76	1886	514.8	3.66	10919	60
24.7	31.62	2514	781.0	3.22	12488	70
24.6	44.24	3118	1088.3	2.87	13874	80
24.4	60.47	3803	1475.5	2.58	15085	90
24.3	78.46	4489	1906.6	2.35	16166	100

GF1050 3-blade propeller

ECO II 3214 Brushless Motor 900KV — GF1050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
24	3.84	532	92.2	5.77	5335	30
24	7.9	978	189.6	5.16	7015	40
23.9	13.67	1476	326.7	4.52	8595	50
23.8	22.74	2093	541.2	3.87	10261	60
23.7	34.39	2739	815.0	3.36	11751	70
23.6	47.65	3362	1124.5	2.99	13012	80
23.4	63.58	3961	1487.8	2.66	14157	90
23.3	81.03	4675	1888.0	2.48	15139	100

HQ1050 3-blade propeller

ECO II 3214 Brushless Motor 900KV — HQ1050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
24	3.74	498	89.8	5.55	5460	30
23.9	7.38	898	176.4	5.09	7072	40
23.9	13.04	1395	311.7	4.48	8682	50
23.8	21.78	2009	518.4	3.88	10347	60
23.6	33.06	2692	780.2	3.45	11853	70
23.5	46.15	3342	1084.5	3.08	13135	80
23.4	61.89	3993	1448.2	2.76	14271	90
23.2	79.82	4698	1851.8	2.54	15297	100

AVIA1050 3-blade propeller

ECO II 3214 Brushless Motor 900KV — AVIA1050 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
24	3.82	486	91.7	5.30	5319	30
24	7.65	909	183.6	4.95	6947	40
23.9	13.67	1456	326.7	4.46	8597	50
23.8	22.58	2119	537.4	3.94	10176	60
23.7	34.52	2832	818.1	3.46	11641	70
23.6	48.17	3508	1136.8	3.09	12842	80
23.4	64.26	4173	1503.7	2.78	13966	90
23.2	82.26	4675	1908.4	2.45	14935	100

GF8*8E 2-blade propeller

ECO II 3214 Brushless Motor 900KV — GF8*8E 2-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
30.9	4.48	476	138.4	3.44	7827	30
30.9	7.58	742	234.2	3.17	9557	40
30.8	13.85	1217	426.6	2.85	11794	50
30.8	22.46	1745	691.8	2.52	13808	60
30.7	34.16	2258	1048.7	2.15	15639	70
30.6	49.47	2776	1513.8	1.83	17222	80
30.5	67.98	3343	2073.4	1.61	18666	90
30.4	87.88	3785	2671.6	1.42	20010	100

1050KV

Battery cells6S

Recommended prop8"-9"

Idle current2.8A @ 10V

Resistance27mΩ

Peak current (spec)86.3A

Max power (spec)2011W

GF8040 3-blade propeller

ECO II 3214 Brushless Motor 1050KV — GF8040 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
25	4.7	541	117.5	4.60	8030	30
25	7.66	813	191.5	4.25	9672	40
25	11.47	1114	286.8	3.88	11273	50
24.9	18.4	1608	458.2	3.51	13400	60
24.8	27.1	2152	672.1	3.20	15349	70
24.7	38.32	2706	946.5	2.86	17171	80
24.6	51.98	3319	1278.7	2.60	18940	90
24.4	69.31	4205	1691.2	2.49	20585	100

HQ8045 3-blade propeller

ECO II 3214 Brushless Motor 1050KV — HQ8045 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
25	4.79	528	119.8	4.41	7565	30
25	7.86	804	196.5	4.09	9123	40
25	12.98	1187	324.5	3.66	10956	50
24.9	21.75	1739	541.6	3.21	13021	60
24.8	32.52	2323	806.5	2.88	14825	70
24.7	46.02	2905	1136.7	2.56	16456	80
24.5	62.57	3511	1533.0	2.29	17924	90
24.3	81.92	4205	1990.7	2.11	19551	100

GF8060 3-blade propeller

ECO II 3214 Brushless Motor 1050KV — GF8060 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
25	4.94	574	123.5	4.65	7441	30
25	8.07	853	201.8	4.23	8965	40
24.9	13.52	1259	336.6	3.74	10880	50
24.9	22.12	1804	550.8	3.28	13061	60
24.8	32.51	2372	806.2	2.94	14891	70
24.7	45.48	2952	1123.4	2.63	16604	80
24.5	60.95	3520	1493.3	2.36	18213	90
24.3	80.34	4187	1952.3	2.14	19761	100

GF9045 3-blade propeller

ECO II 3214 Brushless Motor 1050KV — GF9045 3-blade

Voltage V	Current A	Thrust g	Power W	Efficiency g/W	Speed RPM	Throttle %
24	4.79	567	115.0	4.93	6875	30
24	8.3	917	199.2	4.60	8443	40
24	14.43	1411	346.3	4.07	10313	50
23.9	23.93	2031	571.9	3.55	12289	60
23.7	35.19	2613	834.0	3.13	13996	70
23.6	49.55	3244	1169.4	2.77	15541	80
23.4	67.22	3758	1572.9	2.39	16841	90
23.3	86.29	4470	2010.6	2.22	18222	100

ECO II 3214 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 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.

DP-30.49

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