1976 Evinrude 200 HP Outboards Service Manual, PN 5199, Page 80Get this manual
With continued operation of the motor, the cylinder walls will take on glaze which reduces the effectiveness of the seal between the piston rings and cylinder wallsThe result will be reduced compression and decrease in 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 Figure 5-41 63496
Figure 5-42Surfacing Cylinder Head
Cylinder block and crankcase must be completely clean of all foreign matter prior to reassemblyUse Solvasol for cleaningDO NOT scratch cylinder head gasket surfaces of cylinderCRANKSHAFT SEAL RINGS Check crankshaft seals for excessive wearSeal rings should fit snugly in cylinder block and crankcase, and should form tight seal around crankshaft webs
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Figure 5-41Deglazing Cylinder Walls