Stop in for a cup of coffee

Lets see if this link works...
Jd 6200 Wiring Diagram Yamaha Outboard Kill Switch Wiring
I'm not quite making sense out of this, but here's the circuit. I see a seat switch/relay- looks like it needs that before the key relay. Ties to PTO...
Hmm, not quite, but if you click below the schematic and then advance through the pics there are other schematics. Don't know how correct they are, but bottom line, it's probably got a few safety points before it will let you start other than just the solenoid.