Hi All:
If you actually plan on using that jack, carry it inside the vehicle.
Carrying a HiLift or similar jack outside the vehicle, exposed to the elements leads to a dirty, rusty jack with a gunked-up mechanism. This jack will not be easy, nor safe to operate when needed.
Just my US$00.02 on the issue.
Good luck!
Alan
You can use one of these to help but not eliminate all of the dirt/mud in the jack... http://www.hi-lift.com/accessories/jack-cover.html