HiWonder if anyone can help on this matter. I've just changed the water pump on my maxum 1900sr the problem i think i have is as follows. When testing the engine on a hose pipe after changing the pump i noticed that water only seems to be exiting the transom on the left hand side as you look at the back of the boat. I am getting exhaust fumes and the odd splashing of water on the right hand side. I'm sure in the past i have seen water exiting via both sides, does this mean i have an air lock in the system or does the water only exit via one side?The engine in question is a mercruiser 4.3 fitted with an alpha one leg.