2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 153Get this manual
ENGINE LUBRICATION SYSTEM 4-15 Breather Case and Oil Separator Tank
eo RBrmatvhee:r Hose Clamp [A] Breather Hose [B] Oil Separator Tank [C]
Hold the hose end to the upwardThe oil will flow out if
the hose lies at the bottom
Oil Separator Tank Installation