1992-1998 Kawasaki PWC Jet Ski Service Repair Manual., Page 10Get this manual
ENGINEJET DRIVE
The bilge fitting protrusion extends into the water
flow areaWater passing through causes low pressure
o the end of the hose is stibmerged in inside the hull, the will be "vacuumed" outIn this manner the bilge system drains the bilgeMany an owner with good intentions -thinking his action would smooth flow and increase pump has filed the protrusion described in the previous paragraph smooth with the surrounding area of the pump'During operation of the water craft, the bilge worked in REVERSEWater was pumped from the impeller hausing into the bilge area, quickly filling the bilge and possibly sinking the the rider had to realize what was happening