2003-2005 Kawasaki JetSki Ultra-150 Factory Service Manual, Page 107Get this manual
6-6 ENGINE TOP END Engine Top End Disassembly and Assembly
Disassembly
Remove the engine (see Engine RemovalInstallation chapter) Remove: [A] Spark Plugs
Cylinder Head Nuts [B] and Washers [C] Spark Plug Holder [D] Reinforce [E] Cylinder Head [F] Cylinder Head Gasket [G] Bow [H]