Maintenance65them ineffective.TIP:Inspect ground leads attached to externalanodes on equipped models. Consult aYamaha dealer for inspection and replace-ment of internal anodes attached to the pow-er unit.EMU29323Checking battery (for electric startmodels)WARNINGEWM01902Battery electrolyte is poisonous andcaustic, and batteries generate explosivehydrogen gas. When working near thebattery:● Wear protective eye gear and rubbergloves.● Do not smoke or bring any other sourceof ignition near the battery.The procedure for checking the battery var-ies for different batteries. This procedurecontains typical checks that apply to manybatteries, but you should always refer to thebattery manufacturer’s instructions.NOTICEECM01920A poorly maintained battery will quicklydeteriorate.1. Check the electrolyte level.2. Check the battery’s charge. If your boatis equipped with the digital speedome-ter, the voltmeter and low battery alertfunctions will help you monitor the bat-tery’s charge. If the battery needs charg-ing, consult your Yamaha dealer.3. Check the battery connections. Theyshould be clean, secure, and covered byan insulating cover. WARNING! Badconnections can produce shorting orarcing and cause an explosion.[EWM01912]EMU29334Connecting the batteryWARNINGEWM00572Mount the battery holder securely in adry, well-ventilated, vibration-free loca-tion in the boat. Install a fully charged bat-tery in the holder.ZMU01901ZMU03888