2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 68Get this manual
MAINTENANCE BATTERY AND BATTERY CONNECTIONS
BATTERY AND BATTERY CONNECTIONS
Check battery connections frequentlyPeriodically remove battery to clean and service connections
FUEL AND OIL SYSTEMS
Routine replacement of filters reduces the possibility of foreign material restricting the incoming fuel or oil suppliesReplacement filter elements are available through EvinrudeJohnson Genuine Parts
WARNING
Battery electrolyte is acidic-handle with careIf electrolyte contacts any part of the body, immediately flush with water and seek medical attention Confirm that battery meets the minimum engine requirements Connections must be clean and tight Observe all wiring connections prior to disassemblyDisconnect battery negative (-) cable first and the battery positive (+) cable lastClean all terminals, battery posts, and connectors with solution of baking soda and waterUse wire brush or battery terminal tool to remove corrosion buildupRinse and clean all surfacesReinstall battery and tighten connections securelyRefer to Installing Battery on p47