Wanted: Outboard engine security

[butters]

Can anyone recommend a suitable security bolt /lock that you would recommend for securing your outboard to the transom?
I have been given severan but just want someone to point me in the right direction as to the best and most vandal proof.

Thanks

[m3mm0s rib]

With a welding bet you are Covered

[Richard B]

The Mercury / Quicksilver one saved mine from an attempted theft. It freewheels so it's resistant to saw/angle grinder by design rather than material. The Yahaha ones have a different strategy by encapsulating the nut in a huge hardened steel case.

I would fit two devices as the thieves almost smashed the Mercury device before giving up. I reckon I was probably only a few minutes away for losing the engine.