If you are referring to the pull-out "bike" rack, it does indicate on the rack a limit of 200 lbs. I think the general feeling here is that, coupled with the spare tire on the bumper and the integrity of it, you would be better off finding another method of carrying a generator/w box. First, with the rack fully extended plus the additional weight of either bikes or a generator, you would be subjecting the generator to considerable bouncing. Personally, I wouldn't want a generator fastened to that rack bouncing around back there.
If your RV doesn't have this pull-out extension then we are talking about a different matter.
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2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
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