1981 Johnson/Evinrude 4HP Outboards Service Manual, Page 48Get this manual
performance of the engineBefore reinstalling the pistons, break the glaze by using fine cylinder honeUse low rpm on drill with rapid up and down movement to obtain good crosshatch pattern for good oil retentionUse hone with medium stone (220 grit)GASKET SURFACES Remove all traces of dried cement from gasket surfaces, using OMC Gel Seal and Gasket Remover No390928Check all gasket faces for flatnessUnder certain conditions, gasket faces may warp or spring, particularly where thin sections or flanges are employed and are subject to temperature changes81 0311
Figure 5-13Surfacing Cylinder Head
CRANKSHAFT BEARINGS Check upper needle bearing and center main bearing liners and needle pin wearCheck lower ball bearing for roughnessIf bearings show excessive wear, replaceCONNECTING ROD NEEDLE BEARINGS AND LINERS Check for flat spots on needlesNeedles and liners are supplied as setWhen replacing needle bearings, install the new liners supplied with the needlesInspect wrist pin bearing in connecting rod If worn, replace bearing and wrist pin Figure 5-12Honing Cylinder