I have 2005 Mercury 60hp 2 stroke. As far as the water pump goes, it's shows water pressure on the gauge all the way from an idle to wide open throttle. At an idle it shows barely above 0psi maybe 1psi. At wide open throttle it shows 18psi. Today I took it out and there wasn't the stream coming out of the engine. Pressure showed normal throughout the entire rpm range. Above 4,000 rpms it would drip but not a steady stream. I ran it for a couple hours pretty much the whole time above 4,000 rpms. I figured if the pump was out it would have seized the engine or cracked it somewhere. It ran flawless. Once I got back home with it I blew through the line where it comes out of the engine case. Seems to flow free. I blew back though the engine and it didn't seemed blocked either. The pressure gauge is at the top of the head. The exit line is at the bottom of the head. Any ideas on why I have the pressure but no stream????