1990 Johnson Evinrude "ES" Electric Trollers Service Manual, P/N 507869, Page 6Get this manual
& General Safety Warnings When replacement parts are required, use genuine OMC parts or parts with equivalent characteristics including type, strength and materialFailure to do so may result in product malfunction and possible injury to the operator andor passengers To prevent possible eye injury, always wear SAFETY GLASSES while servicing the unit Always read and follow safety related precautions found on containers of hazardous substances such as parts cleaners, primers, sealants and sealant removers Replace 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 To prevent possible damage, make sure all wiring is properly routed and clamped in its original position away from rotating motor components When using shop air for cleaning or drying parts: aBe sure air supply is regulated to not more than 25 PSI (172 kPa)bBe sure you use appropriate eye protection to avoid personal injury