1997 "EU" Johnson Evinrude 5 thru 15 Four Stroke Service Manual, P/N 507262, Page 134Get this manual
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13Inspect manifold and discard a-ring seals
14Remove screws retaining exhaust adapterRemove adapter and a-ring seal15Inspect adapter and discard a-ring seal
16Remove screws retaining the pressure relief valveRemove valve and gasket17Inspect valve and discard gasket
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18Remove eight screws retaining valve cover and bracket to cylinder headRemove cover and discard gasket19Remove six screws retaining cylinder head to cylinder blockTap on the cylinder head with plastic or leather malletRemove cylinder head and discard gasket