Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 26Get this manual
Following Complete Submersion Salt Water Submersion
Due to the corrosive effect of salt water on internal engine components, complete disassembly is necessary before any attempt is made to start the engine
6Drain water from air compressor system as follows: aDry or replace the air filter for the compressorbRemove air outlet hose for the air compressor and drain water from compressor and hoseReinstall hosecRemove the air hose from bottom of port side fuel rail and drain waterReinstall hose