1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 77Get this manual
CHARGINGSTARTING SYSTEM
Special Tools
1DMT 2000 Digital Tachometer Multi-meter PN 91-854009A1
Battery
Recommended Battery
A 12 volt battery with minimum rating of 465 marine cranking amps (MCA) or 350 cold cranking amps (CCA)For operation below 32 (0 C) rating of 1000 Marine Cranking Amps (MCA) or 775 Cold Cranking Amps (CCA) is recommended