Honda BF115A, BF130A Outboard Motors Shop Manual., Page 32Get this manual
HONDA BF115A-130A
SPARK TEST
1) Set the remote control lever in the "N" (Neutral) position
No.1 SPARK PLUG
2) Remove each spark plug cap from the respective spark plugs3) Remove the spark plugsDisconnect the fuel injector connector of the respective cylinders (P2-15)
No.2 SPARK PLUG
No.3 SPARK PLUG No.4 SPARK PLUG
4) Attach the spark plugs removed in step to the No.1 and the No.4 spark plug caps respectively5) Connect ground wire between the negative (-1 electrode (threaded part) of the No.1 and the No.4 spark plugs and the body ground
No.1 SPARK PLUG CAP