1999 "EE" Evinrude 200, 225 V6 FFI Outboards Service Manual, P/N 787025, Page 178Get this manual
Water Blow-Off Valve Removal
1Remove hoses from housing nipplesPush hose off with flat blade screwdriver2Remove the screws retaining the valve coverRemove valve assembly3Pry the seat from the valve cover
rn 4Inspect the valve cover, spring, seat, and valveReplace if damagedInstallation