Ideas for carrying/securing open framed generator

Lwiddis wrote:
Road, its not the capacity of the rack that causes me concern but rather adding that 100 pounds plus rack to the tongue. Does your TV and hitch have that capacity?

The tongue weight, as per manufacturer, is 340 pounds. GMC says I should consider a WDH if I exceed 700 to 800 pounds tongue weight. The rack weighs 65.6 pounds. The generator is actually 98 pounds so it's a tad over 500.