1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 13Get this manual
NOTE: CYLMODELS
Following Complete Submersion
Submerged engine treatment is divided into distinct problem areasThe most critical is submersion in salt water; the second is submersion while running
Salt Water Submersion (Special Instructions)
Due to the corrosive effect of salt water on internal engine components, complete disassembly is necessary before any attempt is made to start the engine11
Submerged While Running (Special Instructions)
11 Lubrication Points for Accelerator Pump Cam on Cylinder Models Only