2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 148Get this manual
4-10 ENGINE LUBRICATION SYSTEM Engine Oil and il Filter
se ln ood Remove tthe sepastt(ick eAH,uwliEegitinderyHand icnhsaeprtteitr)back to Remove he di [] the dipstick tube [B], and then remove it again to check the oil level
Ch].eck the oil level using the hot level mark on the dipstick [A
High Level Line when Hot [B] [C ]
If the oil level is too high, drain the excess oil thoroughly from the dipstick tube [A] using commercially-available vacuum pump [B]
If the oil level is too low, add the oil to the high level line through the oil filler opening (see Periodic Maintenance chapter)Use the same type and make of oil that is already in the engine