1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 83Get this manual
Batteries vary among manufacturersConsult your battery manufacturer's instructions First, disconnect the negative lead, then the positive lead1Check: Battery fluid level Below the minimum level mark Add distilled water to the proper level Battery fluid specific gravity Less than 1.280 Recharge the bat-
1.280 at 20 (68 F)