1994 Johnson Evinrude "ER" 60 LV 150, 150C, 175 Service Manual, P/N 500611, Page 230Get this manual
Battery Specifications
[!] For each motor provide one battery that is:
12-volt, heavy-duty, designated "marine" Ventedrefillable or maintenance-free Rated 500 CCA (620 MCA) with 90 minutes reserve (60 amp-hrs) Deep-cycle batteries are suitable IF they meet or exceed the minimum CCA requirementsInstalling and Connecting Batteries and Cables Place the battery so it is easily accessible for frequent checking and recharging and in hold-down systemInstall positive cable to positive post and negative cable to negative postWhen connecting to the battery, begin by placing largesurface star washer over the threaded battery post, then stack cables from accessories, then cables from the motorFin ish the connection with hex nut, tightened firmly with wrench DO NOT use wing nuts on battery connections even if they were supplied with the batteryWing nuts can loosen and cause errant warning horn signals or electrical system damageApply OMC Triple-Guard grease to connections
i If the battery mounting system does not cover the connections, install protective coversThis will help prevent shorting or arcing at the battery terminalsBattery Devices Battery IsolatorsIf the engine is equipped with fully regulated charging system and it's supporting two or more batteries, use only one of the following isolators (made by Guest Products)One engine to two batteriesModel 2420 One engine to three batteriesModel 2424 Two engines to three batteriesModel 2423 Battery ON-OFF SwitchesAny master on-off switch in the engine's electrical system must contain "make-before-break" circuit to protect the engine's charging systemAvoid switching batteries while the engine is running, and turn the switch off only while the engine is stoppedBattery Testing