Do all the coolingwater exit trough the pipe?

[Tikkar]

Building a jetboat and drilled the transomholes a bit further up then it would have been originaly on the jetski.
Just wondering if all these 4 hoses that come off the jetpump is inlets?
Last thing i want is for the water to not have enough pressure to make it up the bend and start to fill up the engine with water.
So is any of those 4 pipes outlets! Or does all cooling water exit trough the exhaustpipe?

 

[mikidymac]

1. The hose from inside the jet pump, looks like maybe the left hose in your picture (hard to tell because can't see entire pump) is the pressurised water that feeds the engine.
2. The 2 clear hoses are for the bailers and create a vacuum to suck bilge water out of the hull. You have to use the plastic elbows and mount them up high or they will let water back into the hull instead of out.
3. The right hose is a metered outlet fitting and lets a set amount of water out of the cooling system. It should just dump on the ground through a hole (again can't see in picture). Do not plug or block this hole.