1967 Evinrude StarFlite 80 HP Outboards Service Manual, PN 4359, Page 50Get this manual
To check for flatness, lay sheet of No120 emery cloth on surface plate or piece of plate glassPlace the part to be surfaced on the emery cloth and move slowly back and forth several times in figure motion, exerting evenly distributed, light pressureIf the surface is actually warped or sprung, high
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spots making contact with the surface plate will take on dull polish, while the low areas will have retained their original stateTo insure flatness over the entire surface, continue surfacing until the entire gasket surface has been polished to dull lusterFinish surfacing with No180 emery clothSee Figure 5-23NOTE Cylinder block and crankcase must be completely clean of all foreign matter prior to reassemblyUse Solvasol for cleaning DO NOT scratch cylinder head gasket surfaces of cylinderHEAT EXCHANGER If motor is equipped with heat exchangerexamine it for damageClean it out to remove any forei gn matter that may be accumulatedReplace if damagedIf removed, use Gasoila varnish in reassembling to exhaust cover and torque nuts(See Torque Chart, Page 2- When reassembling be sure tube is firmly positioned in choke housing and heat exchanger recess before tightening gland nut