Jungle Jack Lawn Mower Jack Lift. Brand new Jungle Jack Lift. The jack is small enough and light enough you can carry it around with your truck if you are commercially mowing and need to change blades at a customer site. When you receive your Jungle Jack it will have a paper in it with the information about this new lift assist bar and it will have a telephone number you can call to order the optional lift assist bar. If you have any questions or comments call us toll free at 1-888-473-6357