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Introduction

If your Holy Stone HS720E isn't performing well (unstable flight, undesired path, etc.) it can be a result of poor propellers. The propellers could be physically damaged, obstructed, or even secured incorrectly.

What you need

Step 1 Propeller

Holy Stone HS720E Propeller Replacement, Propeller: step 1, image 1 of 2

Holy Stone HS720E Propeller Replacement, Propeller: step 1, image 2 of 2

Lay out the drone so that its arms are out and oriented upwards.
This will allow to access all the propellers.

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Step 2

Holy Stone HS720E Propeller Replacement: step 2, image 3 of 3

Remove the two 1 mm screws securing the propeller using a Phillips #00 screwdriver.
Some pressure will be needed when unscrewing or it won't be easy due to the swivel mount.
Remove the damaged/malfunctioning propeller.

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Step 3

While the swivel mount is exposed, remove any debris found. Removing the debris will improve the drone's performance.
When fastening the replacement propeller, be sure that the screws are inserted into the two holes on the swivel mount.