On Mon, 03 Mar 2008 21:21:44 GMT, "LoogyPicker"
wrote:

Dual axle boat trailers normally need no more than 3% tongue weight.

That has *not* been my experience, at least not for interstate highway
speeds. After a lot of tuning I ended up with around 7or 8% before I
felt comfortable with my old boat/trailer combo. Proper tire
inflation on both truck and trailer is important also.