Honda B75K2-B75K3 Outboard Motors Manual., Page 28Get this manual
Assembly Oil pump 1Install the inner and outer rotors, oil pump shaft and gasket to the pump body, and install the pump cover with the two mm screws and lock washers
Check the pump shaft for smooth rotation after assemblyNoteOn Model 1974 and after, two O-rings are used as the oil pump gasketPosition the oil pump shaft against the camshaft end and fit the oil pump shaft to the camshaft by rotating the camshaft slowly and aligning the pin in the camshaft with the slot on the oil pump shaft endInstall the oil pick-up pipe together with the check valve spring and check valve