1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 287Get this manual
Gear Housing Removal WARNING
To prevent accidental engine starting, remove (and isolate) spark plug leads from spark plugs before removing gear housing1R emove (and isolate) spark plug le ads from spark plugs2Shift into AL3Loosen jam nutUnscrew attaching nut to separate