I wasn't aware that it used two systems. That makes sense now, thanks. So, how do you drain the open loop part of the system? Also, where is the water pickup for it located? Thanks.
Yep, the closed loop system for the engine (which is good if you run on salt water) and the open loop system for the intercooler and the exhaust. Most of the exhaust is self draining but the intercooler and the exhaust manifold are not. To protect them from freezing you have to remove some hoses and poor some anti-freeze in.
The water for the open loop system is supplied by a pressurized area in the jet pump.