Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 202Get this manual

Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 202

OIL INJECTION
Oil Hose Check Valve Installation on 1998 Model 135150 DFI Outboards SN 0G886266 and Below
To prevent possible momentary oil starvation in the oil pump delivery hoses, it is recommended that check valve kit 21-858945A2 be installed as follows:

NOTE: Refer to Service Bulletin 98-231Remove flywheel coverPull out vent hose

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