2004 Poalaris MSX110, MSX150 PWC Original Service Manual, Page 103Get this manual
ENGINE DISASSEMBLYASSEMBLY Engine Assembly
32Rotate the engine 180_(Cylinder Head Down) 33Install the oil pump relief valve piston and springPlace cover over spring and insert fastenerHandtighten fastener34Install the remaining lower crankcase fastener35Rotate the engine 180_(Cylinder Head Up) 36Tighten cylinder head nuts and lower crankcase fasteners to specification as outlined on page 4.1537Rotate the engine 180_(Cylinder Head Down) 38Proceed with the TIMING CHAIN INSTALLATIONTDC PROCEDURE