It would be ineresting to see if it lowers the idle enough to get the drive into neutral. I can tell you that both the orginal one (OMC) and the aftermarket one from CDI lower mine from 600 to about 450. If yours does this on the water hose it should be OK.
I called Crowley Marine when I noticed the disparity between the # on the box and the # on the ESA. They checked a few things and 'thought' it was the right one. Then I called BRP customer service tech support who had no idea, and they referred me to a dealer who (predictably) had no idea also, lol. I still think it's a mistake made by BRP in that the item was mis-boxed, but if it works for you then maybe not. Still have mine, bought it about 3 years ago and can't send it back!