EMAX ECO II 2807

What you get for $19.49

• 2.6 kg of pull on 6S

  On EMAX’s 25.2 V bench the 1300KV pulled 2,640 g at full throttle on an HQ 7 × 4 × 3, drawing 51.2 A.

  Source: EMAX 1300KV thrust tables

• Over 5 g/W at 300 g

  Making 300 g of thrust on 6S, the 1300KV ran at 5.18 to 5.67 g/W depending on the prop.

  Source: EMAX 1300KV thrust tables

• Bigger bearings and mount

  EZO 12 mm bearings, which EMAX says handle the higher loads of larger props, and a 19 × 19 mm mount sized for 7-inch frames.

  Source: EMAX USA product page

• N52SH arc magnets

  Curved N52SH magnets. EMAX says the step up from N48 magnets gives more torque and thrust.

  Source: EMAX USA product page

What to pair it with

Our reading of EMAX’s numbers, so your build matches what the motor was tested with.

ESC

EMAX rates the peak current at 52 A for the 1300KV on 6S, 58 A for the 1500KV on 5S and 52 A for the 1700KV on 4S; its bench tests reached 51.2 A, 57.1 A and 51.2 A. A 60 A or bigger ESC covers all three. (EMAX spec sheet, EMAX 1300KV thrust tables, EMAX 1500KV thrust tables, EMAX 1700KV thrust tables)

Props

EMAX lists 6 to 7-inch props and tested four 7-inch ones: the 2-blade Gemfan 7042 and the 3-blade Gemfan 7040, HQ 7 × 3.5 × 3 and HQ 7 × 4 × 3. On 6S the 1300KV pulled 2,190–2,640 g at full throttle, most on the HQ 7 × 4 × 3 and least on the 2-blade 7042. (EMAX spec sheet, EMAX 1300KV thrust tables)

Battery

6S for the 1300KV, 5S for the 1500KV, 4S for the 1700KV. EMAX rates them for 3S–6S, 3S–5S and 3S–4S. (EMAX spec sheet)

Frame

Four M3 holes on a 19 mm circle (19 × 19 mm, the pattern EMAX sizes for 7-inch frames). M3 screws in 8 and 10 mm lengths and an M5 nylock nut come in the box. (EMAX spec sheet, EMAX USA product page, EMAX product page)

Where to buy

• EMAX USAthe maker’s store; same price for every KV
  $19.49seen Oct 19, 2026
  Visit
• RaceDayQuads1300KV
  price on the store’s page
  Visit
• Pyrodrone1300KV
  price on the store’s page
  Visit
• WREKDchoose the KV
  price on the store’s page
  Visit
• NewBeeDrone1300KV
  price on the store’s page
  Visit

Plain links, not affiliate links. Prices change; the store’s page has the current one.

Full specs

Bench data

Redrawn from EMAX’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.

Inside the motor

A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:

• Shaft. Steel, M5 thread, protrudes 14 mm; 4 mm through the bearings. (EMAX spec sheet, EMAX product page)
• Bell. Rounded, with thicker reinforcements; mirror-polished. (EMAX USA product page)
• Magnets. N52SH arc magnets (EMAX’s infographic says N52, replacing the N48 magnets of its predecessor). (EMAX USA product page)
• Stator. The coils are wound on a stack of thin steel laminations: 28 × 7 mm (2807). (EMAX USA product page)
• Winding. Multi-strand. (EMAX product page)
• Bearings. EZO 12 mm. (EMAX USA product page)
• Base. 4 × M3 holes on a 19 mm circle (19 × 19 mm). (EMAX spec sheet)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1300KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.

A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.

About the 3D model

A generic outrunner drawn from EMAX’s published sizes: the 28 × 7 mm stator, 33.9 mm bell, 20 mm height, 5 mm shaft, 19 mm mounting circle and 12 teeth and 14 magnets. Anything EMAX doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.

Sources

1. EMAX USA: ECO II 2807 Brushless Motor (product page, with EMAX’s ECO II infographics). Retrieved Oct 19, 2026.
2. EMAX: ECO II Series 2807 1300KV 1500KV 1700KV (product page on EMAX’s global store). Retrieved Oct 19, 2026.
3. EMAX: ECO II 2807 spec sheet (dimension drawing and spec table for each KV; image on EMAX’s product page). Retrieved Oct 19, 2026.
4. EMAX: ECO II 2807 1300KV thrust tables at 25.2 V, four props (image on EMAX’s product page). Steps of 300, 500, 700, 900 and 1,100 g, then "Max" at full throttle; EMAX’s rpm column is left out because it has no figure at full throttle.. Retrieved Oct 19, 2026.
5. EMAX: ECO II 2807 1500KV thrust tables at 21 V, four props (image on EMAX’s product page). Steps of 300, 500, 700, 900 and 1,100 g, then "Max" at full throttle; EMAX’s rpm column is left out because it has no figure at full throttle.. Retrieved Oct 19, 2026.
6. EMAX: ECO II 2807 1700KV thrust tables at 16.8 V, four props (image on EMAX’s product page). Steps of 300, 500, 700, 900 and 1,100 g, then "Max" at full throttle; EMAX’s rpm column is left out because it has no figure at full throttle.. Retrieved Oct 19, 2026.