Probably will not be much of a problem (simple solution) depending on the water flow. If the scoop can take in enough water that causes pressure in the lines significant enough to flush the water through that would not be a problem. The scoop can only accept so much.
If the scoop and input pipe are too small then there could be a water flow issue for either the ESC or the motor or both.
Probably the simplest way to figure this out is to measure the ID of both pipes then calculate the area of each and add those numbers together. That would be the area needed (can convert back to a single ID) for the inside of the pipe and scoop at it's smallest point. This would be a minimum number. A bigger number will supply more pressure.
Keep in mind that the Scoops flow will be virtually zero if you are backing especially for any length of time, for instance a tug going backwards pulling a ship away from a pier.
I have several applications I use individual scoops or a single scoop both for supplying several units.
I hope this works for you.