I have one other idea,
what about a momentary push and the motor cranks until it fires?
that is how it is in my truck, I just turn the key, let it go and it cranks until it starts
now this would really only be useful for boats that are injected I would think
so a no accessory, push once to start the motor turning over and it turns over until it starts
I live in my own little world. But it's OK - They know me here