1998 Johnson Evinrude "EC" 150, 175 FFI Service Manual, P/N 520211, Page 31Get this manual
8If the engine is removed from the boat, examine all hardware you loosened or removed from the motor and its steering, throttle, and shift systemsReplace damaged or missing parts with genuine OMC parts or equivalentThese fasteners are made of special materials to resist weakening and rustingDo not substitute these fasteners with nuts and bolts which look the sameUsing the wrong nuts and bolts may result in sudden, unexpected loss of engine control9Inspect the entire boat steering system for damage due to corrosion, aging, lack of maintenance, or abuseInspect mechanical steering cables for deterioration or cracksInspect power steering models for fluid leaks or other external signs of problemsFollow equipment manufacturer's maintenance and lubrication recommendations when servicing the steering system&
10Remove the battery and check its condition and water level, then chargeStore it in cool, dry place, out of direct sunlightCheck the water level and charge periodically during storageRefer to OMC Accessories Service Manual for battery maintenance information11Service the boat fuel filter following instructions on canisterReplace the engine's filter canister12Clean and inspect oil reservoir and pickup filterReplace filter if it is damaged or contaminatedLeave the oil hoses connected to the engineFill the oil tank with recommended oil to reduce or prevent condensation from forming in the tank during storage