1998-2004 Yamaha WaveRunner XL700 XL760 XL1200 Factory Service Manual, Page 42Get this manual
'''''''EL_E_C_T_R_IC_A_L_ '''''' ELECTRICAL Battery inspection
CAUTION:
Be carefu not to place the battery on its sideBefore adding the battery fluid or recharging, be sure to remove it from the battery compartmentWhen checking the battery, make sure the breather hose is connected to the battery and is not pinched shut anywhere in the battery compartment
A WARNING