1991 Johnson/Evinrude EI 60 thru 70 outboards Service Manual, Page 337Get this manual
(8) 1491 1501 31Remove the high pressure port O-ring 32 Remove the trim-down relief valve and spring
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r;;-:;l 33Clean 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
34Remove the spring from the expansion relief valve
1531 35Remove the expansion relief valve core1541 36Remove the expansion relief valve seat1551 37Clean and inspect all the components of the expansion