2004 SR Johnson 2 Stroke 9.9, 15, 25, 30 HP Outboards Service Manual, Page 48Get this manual
INSTALLATION AND PREDELIVERY BATIERY AND CABLES
BATTERY AND CABLES
Select battery that meets or exceeds the minimum requirementsMinimum 12 Volt Battery Requirements Model
9.915 or 2530
Installation
IMPORTANT: Connect the battery positive (+)
cable to the battery positive (+) post FIRSTConnect the battery negative (-) cable to the battery negative (-) post LASTInstall starwasher on the threaded battery postStack cables from the outboard, then cables from accessoriesFinish this connection with hex nut
Battery Rating 360 CCA (465 MCA), 50 amp-hr minimum
Installing Battery
Proper installation will prevent battery movement while underway
Location and Preparation
Secure all batteries in protected locations Position battery as close to the outboard as possible Battery location must provide access for periodic maintenance Use battery mounting trays or battery boxes on all battery installations Connections and terminals must be insulated Battery connections must be clean and free from corrosion Read and understand the safety information supplied with the battery before installation