Question 1

Q: What are the advantages of SZ1804 motor over SZ1404 motor?

Accepted Answer

A: The SZ1804 motor is larger, heavier, and more efficient than the SZ1404 motor, which can prolong the flight time.

Question 2

Q: What kind of LiPo batteries can be used on this SZ1804 motor?

Accepted Answer

A: The recommended battery is 6S LiPo for 2450kv, 4S LiPo is for 3500kv.

Question 3

Q: SZ1804 Motor matching frame size range?

Accepted Answer

A: The 1804 motor can be matched in 3 to 3.5in.

Question 4

Q: SZ1804 Motor with different frame sizes, what will be the differences in its use scenarios?

Accepted Answer

A: Indoor flight, you can choose 3in frame; if you need to fly long distances, you can choose 3.5in frame.

Question 5

Q: SZ1804 Can the motor be used with a 5-inch propeller?

Accepted Answer

A: Can not be used, the KV value is the ratio of the motor speed to the voltage. The higher the KV value, the higher the speed of the motor. SZ1804 Motor KV value 2450,3500 speed is too high, causing the motor to burn out.

Question 6

Is the MEPS SZ1804 a good motor for a 3-inch FPV drone?

Accepted Answer

Yes. The SZ1804 is designed specifically for 3-inch freestyle and racing builds, with fast throttle response, strong efficiency, and enough thrust to keep a lightweight 3-inch quad agile and punchy.

Question 7

What is the difference between the 2450KV and 3500KV versions?

Accepted Answer

The 2450KV version is intended for 6S setups, while the 3500KV version is intended for 4S setups. Choose based on your battery voltage, not just on power preference.

Question 8

Which version should I choose for 3-inch freestyle: 2450KV or 3500KV?

Accepted Answer

Choose 2450KV if you run 6S and want efficient power delivery on a lightweight 3-inch build. Choose 3500KV if you run 4S and want strong response for a typical 3-inch freestyle setup.

Question 9

Can the SZ1804 be used on a 3.5-inch cinewhoop?

Accepted Answer

Yes. It is suitable for selected lightweight 3.5-inch cinewhoop builds, especially when efficiency, compact size, and smooth control matter. Be sure to match the prop, frame weight, and battery setup carefully.

Question 10

Is this motor better for indoor flying or outdoor freestyle?

Accepted Answer

It can do both. The compact size and responsive control help in tight indoor spaces, while the available thrust and efficient design also make it capable for outdoor 3-inch freestyle flying.

Question 11

How much thrust does the SZ1804 produce?

Accepted Answer

The motor can produce up to 731g of thrust, depending on the KV version, battery voltage, propeller choice, and test conditions. Real-world results will vary by build.

Question 12

Is the SZ1804 durable enough for freestyle use?

Accepted Answer

Yes. It uses a uni-bell structure, 6061 aluminum alloy, a 1.5mm stainless steel shaft, N52H arc magnets, and NMB ball bearings to support durability without adding unnecessary weight.

Question 13

Is this a good choice if I want efficiency and quick throttle response?

Accepted Answer

Yes. The SZ1804 is built for high efficiency and low rotational inertia, which helps deliver crisp throttle response, fast recovery, and better control on lightweight 3-inch builds.

Question 14

What ESC rating is recommended for this motor?

Accepted Answer

For the 2450KV version, an ESC that can comfortably support around 20A peak per motor is a sensible baseline. For the 3500KV version, choose an ESC that can handle around 25A peak per motor with enough safety margin.

Question 15

Is the SZ1804 too small for a 3.5-inch build?

Accepted Answer

Not necessarily. It can work well on lighter 3.5-inch builds, especially cinewhoops, but overall frame weight, prop load, and intended flight style will determine whether it is the right match.

Question 16

What makes the SZ1804 responsive in flight?

Accepted Answer

Its lightweight design, optimized rotor structure, and magnetic system help reduce rotational inertia. That allows faster RPM changes, cleaner direction changes, and a more connected flight feel.

Question 17

Why does the motor feel notchy when I spin it by hand?

Accepted Answer

A slight notchy feel is normal on brushless motors because the magnets interact with the stator. It does not automatically mean there is a bearing problem.

Question 18

My motors are getting hot. Is that normal?

Accepted Answer

Warm motors can be normal after flight, but excessive heat may point to an overloaded prop, aggressive tune, excess weight, or poor airflow. Check props, tune, frame vibration, and battery matching.

Question 19

How should I maintain the SZ1804 after crashes or dirty flights?

Accepted Answer

Remove debris with compressed air or a soft non-metallic tool, inspect the shaft and bell for damage, and make sure the motor still spins smoothly. Regular cleaning helps preserve performance and bearing life.

MEPS SZ1804 High-efficiency FPV Brushless Motor for 3inch Drone 2450KV/3500KV

Small Size, Massive Thrust & Efficiency

Agile Maneuverability & Instant Response

Built for Tight Spaces & Dynamic Flights

Unibell Design with Premium Durability

Package Included