1994 Johnson/Evinrude "ER" 60 thru 70 outboards Service Manual, Page 320Get this manual
149131Remove the high pressure port O-ring 150132Remove the trim-down relief valve and spring33Clean and inspect the components of the trim-down pump relief valveReplace the rubber sealif necessaryThe seal can be easily removed from the valve with your fingernailPress new seal in place with the ridge facing out
152134Remove the spring from the expansion relief valve153135Remove the expansion relief valve core154136Remove the expansion relief valve seat155137Clean and inspect all the components of the expansion