Have a twin Zonda as one of my boats,I’ve had cooling issues with it,it has a dual pick up rudder with large diameter tubing,when I put a tube against the exaust port and blow its EZ to blow air back thru the rudder ,I pulled the lines off and checked the motors and ESC to make sure they were clear ,still just a trickle of water comes out the exaust port when I run the boat by,I had an extra rudder so I changed it but no difference ,the ESCs get hot fast,I sprayed some WD 40 inside the exaust ports then blew it out with an air compressor and it all blew right out the rudder ,I’m really at a loss as to what to do to get water to flow ,help please ,thanks ,