Expertises: Art, Painting, Drawing, Home improvement, Gardening
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When you release the trigger, the motor will turn off. Again, when you pull the trigger to spray, the motor will turn on. This is how airless paint sprayers function; it eliminates the loud constant noise generated by the motor and increases the longevity of the device.
However, if the motor runs when you release the trigger, that means it is not primed.
