Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 466Get this manual
STARTING SYSTEM (F8CW) CHECKING THE BATTERY
Check: Battery electrolyte level and specific gravityRefer to "CHECKING THE BATTERY" on page 3-22Check: Main switch continuity Refer to "CHECKING THE MAIN SWITCH" on page 8-15
CHECKING THE MAIN SWITCH
CHECKING THE STARTER RELAY
1Check: Starter relay continuity Out of specification ReplaceStarter relay continuity
TerminalTerminal Brown (Br)Black (B)