1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 287Get this manual
COA2462
1 31 Remove the high pressure port O-ring 491 1501 32Remove the trim-down relief valve and spring r-:;l 33 Clean and inspect the components of the trim-down pump relief valve Replace the rubber sealif necessaryThe seal can be easily removed from the valve with your fingernailPress new seal in place with the ridge facing out
34Remove the spring from the expansion relief valve
1531 35 Remove the expansion relief valve core 1541 36Remove the expansion relief valve seat1551 37 Clean and inspect all the components of the expansion