If you have the AR390SS the connectors would probably fit- but that wouldn't be the case for most consumer-grade electric pressure washers.
It's not just the water pressure (PSI); it's also the volume of water (gallons-per-minute, or GPM). The AR390SS pushes 1.4 GPM; but most gas units start at 2 GPM and go higher. You need enough pressure to break the clog and enough volume to move the clog backward out of the pipe.
This unit has a maximum rating of 4000 PSI and 4.5 GPM, so its best performance would likely be between about half that (2000 PSI and 2.5 PSI) and just under max (3800 PSI and 4 GPM)