FreshWaterVolvoPentaParts Com Flushing Volvo Penta Cooling system 

Maybe I'm just lazy, but there's no way I would pull that hose more than once. I would install a T or Y fitting to attach a garden hose to it, and a valve.

Just what I was looking for. Thanks for sharing.

Does this company stand behind its 1-yr warranty?

Newby question. Does boat need to be out of salt water to do this?