1976 Evinrude 4 HP Service Repair Manual Models P/N 506721, Page 38Get this manual

1976 Evinrude 4 HP Service Repair Manual Models P/N 506721, Page 38

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Sinee the pistons, with the piston rings, reeeive the foree of eombustion in the eylinder head, it is neeessary that both the pistons and piston rings properly fitted to form seal between the piston h