1967 Evinrude StarFlite 80 HP Outboards Service Manual, PN 4359, Page 49Get this manual
Refer to Section for specified dimensionsIf wear is greater than .003", replace cylinder block, or rebore block for oversize pistonsPistons and ring sets are available .020" and .040" oversizeNOTE If your shop is not equipped to rebore cylin-
der blocks, write the Evinrude Service Department about our reboring service Carbon accumulation on walls of the exhaust ports restricts the flow of exhaust gases and has considerable effect on performance of the motorCarefully scrape carbon from cylinder heads and exhaust ports with scraper or other blunt instrumentWalls of exhaust ports and all exhaust passages must be free from carbon deposits to insure maximum performance Avoid getting carbon in water jacketsWith continued operation of the motor, the cylinder walls will take on glaze which educes the effectiveness of the seal between the piston rings and cylinder wallsThe result will be reduced compression and decrease in performance of the motorBefore reinstalling the pistons, break the glaze by USing fine cylinder hone to refinish cylinder wallsA few up and down motions of the tool should be sufficient to remove cylinder wall glazeSee igur 5-22GASKET SURFACES Remove all traces of dried cement, USing lacquer thinner or trichorethyleneCheck ll gasket faces for flatnessUnder certain conditionsgasket faces may warp or spring, particularly where thin sections or flanges are employed and are subject to temperature changes