Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 9Get this manual
Periodic Inspection Conduct periodicsystematic inspection to uncover and correct fail ure before it can cause inconvenience or mecha ni cal damageInspectio interva is based on average pe rating condi ion in utility serviceUnder severe co nditi ons, the inspecti on interval shou ld be shortened Inspection includes: 1Clea ntire unit thoroug hlyinclud ing all accessible power head paris
1Remove prope ll er and related mounting hard ware2Co mpress rubber cup (a) and guide flu sh kit onto
ant i-ven tilation plate, position ing cup over water intake opening (b )
2Check en tire unit for loose, damaged or missing pa rtsTighten or rep lace as requ ired 3Lubr icate gear housing as instructed previously4l ubr icate other points as indicatedpreceding5Se rvice spark pl ugInspect spark plug lead and electrica lead for amag deteriorati on, as ex plai ned in Section 2A,Igniti on System
6In spect fuel hoses for da mage or deterio ration and