2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 258Get this manual
Ignition and ignition control systemEngine electric control system NOTE: To prevent the engine from starting when cranking it, be sure to disconnect both spark plug caps Do not remove the clip from the engine stop lanyard switch When using the manual starter to crank the engine, the voltage values may vary depending on the speed at which the starter handle is pulled Be sure to check the charge coil and pulser coil before measuring the CDI unit output peak voltageCDI unit output peak voltage: Orange (O) Black (B) rmin DC Loaded Cranking 140 1,500 150 3,500 150 Thermoswitch input voltage (reference data): Grayblack (GyB) Black (B) 7.5 at engine idle speed 3Push the engine stop button(Tiller handle model) Turn the engine start switch to "OFF (Remote control model) 4Remove the thermoswitch5Place the thermoswitch in container of water and slowly heat the water