1997 Johnson Evinrude "EU" Accessories Service Manual, P/N 507270, Page 70Get this manual
General Safety Warnings
Before working on any part of the fuel system, read the section called Safety at the end of this manualCheck nonmetallic fuel system parts for signs of deterioration, cuts, cracking, or abrasionAlways replace with specified partsAfter completing any service procedure, momentarily pressurize fuel system and check for leaks! Fuel leakage could contribute to fire or explosionWhen using shop air for cleaning or drying parts: Be sure air supply is regulated to not more than 25 PSI (172 kPa) Be sure you use appropriate eye protection to avoid personal injuryReplace any locking fastener (locknut or patch screw) if its locking feature becomes weakDefinite resistance to tightening must be felt when reusing locking fastenerIf replacement is indicated, use only authorized replacement or equivalent