2003-2005 Kawasaki Ultra-150 Jet Ski Factory Service Manual., Page 132Get this manual
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ENGINE BOTTOM END 8-17 Crankcase
p he Saklie tout cthanplcuagseA] to remove the rear check valve [B]from the lower crankcase
ot ea he ve Traapntkhceafsre nwi[tA]aandirtablre[B]ccewc