How do I start a boat without a key?

Other answer:

S4 Active:
With a starter button and jumper wire, the same way a marine mechanic starts customers boats
CMV:
Bent paperclip
krazybob613:
Call a locksmith and prove your ownership then he will replace the lock for you.
Tbone:
Try using the spare key…. Hope this helps……
Johnny Thunder:
With one of these bad boys
Square basher!:
You don't!
Just leave it to the owner!