Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 205Get this manual
OIL INJECTION
NOTE: All check valvehose assemblies for cylinders 2, 4, are brass colored and have 1.250 (31.75 mm) long hoses attached to check valveIMPORTANT: Due to the close proximity of the #2 cylinder oil hose to the flywheel, it will be necessary to trim the length of the #2 oil hose to provide adequate clearance between the oil hose and the flywheel when the check valve assembly is installed9Trim off #2 cylinder oil hose to an appropriate length (to provide clearance between hose and flywheel) and install new check valvehose assemblySecure hose connections with sta-straps10Install new check valvehose assemblies on cylinders #4 and #6Secure all hose connections with sta-straps