What's the HP limit for the Cool Fuel system?

Don't know, but the pump has no issues with mine and I'm a heavy cruiser. My guess is Eddie Young or Smitty would know

I did look at the Weldon pumps but thought they would flow way too much. I do know they have the pump controller that can slow it down but I think that is installed right next to the pump and not sure if it is USCG approved.

Just re-did my fuel system for procharger. I ran return line back to fuel water sep the fuel cooler was needed to keep the circulated fuel cool. Works like a champ. I have two tanks Y both together went to fuel water sep, went to A1000 pump low on stringer, out to regulator, then to fuel rail. Factory Merc runs return line back to fuel water sep with the cool fuel system that’s how i keep mine. I have ran mine about 40 mile stretch on way at lake ran perfect. Help was from Arizona Speed and Marine for setup based on their exp.