1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Repair Manual P/N 507947, Page 331Get this manual
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16 Place the ball of the down relief valve in the manifold 17 Install the down relief valve guide and spring[!z] 18 Oil and install two new pressue port O-ringsr:t8119 Install the pump assembIyThe pum