2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 252Get this manual
Starting system 2Push the engine start button, and then measure the input voltage between the neutral switch connector (engine start button end) and the groundCheck the engine start button and wiring harness if below specificationNeutral switch continuity: Brown (Br) Brown (Br) Switch position Pushed (neutral) Free (forward or reverse) Continuity Yes No
4Connect the neutral switch connectors
Checking the neutral switch (remote control model)
1Set the remote control lever to the neutral, forward or reverse positionR Br Br Br
S6AG8210
2Turn the engine start switch to "START," and then check the engine start switch for continuity at the 10-pin main harness coupler (remote control box end)Check the wiring harness or replace the neutral switch if out of specificationOFF ON START