Jayco 17.55-4/Jackaroo 3.1 Deisel combination

You'll have no worries with that setup, the Jack has a towball max of 250kg and can legally tow 2500kg.... I pull a 2500kg Gin Palace with mine no worries....

Should be ok on paper, as mentioned - by the time you are loaded up though, the 3.1 will be working hard. Re the download spec on the ball - my 3.0L 99 Jack (have just sold it) originally had a spec of 120kg - if you have the right towbar, you might be ok with a 250kg limit for all practical purposes, but insurance (and claims) issues can't be discounted. Suggest you make sure you are in the clear. BTW - we have only towed our Campomatic with the Jack - with a decent van in mind for the near future, I moved up to the higher specs of a LC 100.