Chrysler 70, 75 and 85 HP Outboard Motors Service Manual OB 3438, Page 134Get this manual
CResurface cylinder headif it is only slightly warpedlay sheet of No 120 emery cloth on the glass and slide cover around in figure motionexerting light and even pressureDExamine gasket surface areahigh spots will be dull, low spots unchanged Continue until entire gasket surface has dull finish Finish off with No180 emery cloth Figure 30 CInspect reed plate screens
Figure 30Resurfacing Cylinder Head
Figure 32Inspecting Cylinder Drain Screens
6Inspect and disassemble cylinder drain reed plate as followsAInspect reeds for wear or damageBTo replace reedsremove three (3) pan head screws and washers that secure reed stops and reeds to reed plateFigure 31