Only if a pilot attempts to maintain the pitch at the same angle relative to the horizon would an airplane slow to a stall on engine out. But if the pilot is holding a constant pressure, or no pressure (trimmed,) then the air speed will not change much. That is because by regulatory requirement trim (and implicitly constant back pressure) must act as an airplane's speed cruise control.
In fact, no airplane designed to Part 23 standards for trim and longitudinal stability will exhibit the behavior that you claim.
So I extend to you the same $50 bet I presented above: that if you put your E-LSA (presumably built to ASTM standards which have similar longitudinal stability requirements to those in Part 23) into a climb and trim to Vx or Vy climb speed, or hold constant stick force to accomplish same, then your Sky Arrow 600 will not stall within either 3 or even 300 seconds after you cut engine power.
If you decide to publicly accept the bet and I win, don't send me the $50 - just make a donation to
Angel Flight West in that amount. But it is safer to not publicly accept the bet and quietly confirm it for yourself, then if it doesn't work out like you thought you aren't out a penny. Keep in mind none of the other posters I offered the bet to has yet publicly accepted. Maybe they don't want to take my money? Maybe weather hasn't been favorable to go up yet and video record the alleged stalls before accepting my bet so as to make it a sure-thing?