Overview

The EMAX ECOIII (E3 Series) 2807 brushless motor is designed for FPV multirotor builds that need strong torque and efficiency on larger propellers. It is offered in 1300KV, 1500KV, and 1700KV options, with a 5mm shaft and published 6″-7″ propeller support.

Key Features

Aircraft-grade 7075 aluminum construction (E3 Series)
Hardened steel shaft
Precision-engineered G1 bearing
Single-strand winding design for reduced electrical resistance and improved heat dissipation
N52SH arc magnets (E3 Series)

Specifications

General (ECOIII-2807)

Motor dimensions	34.8*34.9mm
Framework	12N14P
Bearing shaft	5mm
Lead	18#AWG 200mm
Weight	49.6g (W/O Silicone Wire)
Propeller	6″-7″

KV1300

Idle current (10V)	1.4A
Internal resistance	60m
No. of cells	3-6S
Peak current	55A (6S)
Max. power	1390W (6S)

KV1500

Idle current (10V)	1.8A
Internal resistance	50m
No. of cells	3-6S
Peak current	63A (6S)
Max. power	1590W (6S)

KV1700

Idle current (10V)	2.1A
Internal resistance	40m
No. of cells	3-4S
Peak current	54A (4S)
Max. power	907W (4S)

Thrust Test Data

ECOIII-2807-1300KV (25.2V), Propeller: EMAX AVIA7035 3-blade propeller

Voltage (V)	Current (A)	Thrust (g)	Power (W)	Efficiency (g/W)	Speed (RPM)
25.2	2.06	300	51.91	5.78	9050
25.2	3.91	500	98.53	5.07	11640
25.2	6.46	730	162.79	4.48	14050
25.2	9.92	1050	249.98	4.20	16560
25.2	14.2	1320	357.84	3.69	18980
25.2	19.1	1610	481.32	3.34	21060
25.2	25.2	1950	635.04	3.07	23180
25.2	32.4	2290	816.48	2.80	Max

ECOIII-2807-1500KV (25.2V), Propeller: EMAX AVIA7040 3-blade propeller

Voltage (V)	Current (A)	Thrust (g)	Power (W)	Efficiency (g/W)	Speed (RPM)
25.2	2.66	340	67.03	5.07	10380
25.2	5.2	590	131.04	4.50	13290
25.2	8.75	870	220.50	3.95	15970
25.2	13.7	1230	345.24	3.56	18590
25.2	20.2	1595	509.04	3.13	20950
25.2	28.5	1990	718.20	2.77	23060
25.2	38.1	2270	960.12	2.36	24960
25.2	51.3	2580	1292.76	2.00	Max

ECOIII-2807-1700KV (16.8V), Propeller: EMAX AVIA7035 3-blade propeller

Voltage (V)	Current (A)	Thrust (g)	Power (W)	Efficiency (g/W)	Speed (RPM)
16.8	2.2	225	36.96	6.09	7890
16.8	4.23	380	71.06	5.35	10240
16.8	6.84	560	114.91	4.87	12290
16.8	10.2	750	171.36	4.38	14280
16.8	14.6	980	245.28	4.00	16360
16.8	20.1	1230	337.68	3.64	18340
16.8	26.2	1480	440.16	3.36	20120
16.8	33.4	1760	561.12	3.14	Max

Applications

FPV freestyle and racing builds
High-load FPV setups using 6″-7″ propellers
Cinematic FPV platforms where higher torque is required

For product selection help (KV choice, battery cell count, and prop matching) or after-sales support, contact https:/// or email support@.

Details

The ECOIII 2807 E3 Series motor targets 67 inch prop builds that need strong torque and efficiency.

Aircraft-grade 7075 aluminum parts, a hardened steel shaft, and G1 bearing support durability for demanding FPV use.

Multiple KV options make it easier to match the motor to your battery voltage and prop size for racing, freestyle, or cinematic builds.

Single-strand winding is designed to reduce electrical resistance while improving heat dissipation under load.

N52SH arc magnets help deliver crisp throttle response and consistent power on high-load prop setups.

Full ECOIII-2807 spec sheet includes dimensions, 5mm shaft size, wire length, cell count range, and KV variants.

Thrust test tables provide quick comparisons of current draw, thrust, and efficiency for each KV option.

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EMAX ECOIII (E3 Series) 2807 Brushless Motor 3-6S 1300KV/1500KV/1700KV, 5mm Shaft FPV