boat trailers with too little tongue weight tend to do what

I ran into the same problem last summer. With insufficient tongue weight the trailer would bounce a lot, especially when hitting a bump. It made the front end of the ATV feel loose and I kept over‑steering. I ended up adding a few sandbags on the trailer deck to bring the tongue weight up to about 10‑12% of the total load. It cured the sway and the steering felt much more planted. Just make sure the weight is centered and secured so it doesn't shift while riding.

A word of caution: if you ignore the tongue weight issue you could get trailer sway at highway speeds, which is dangerous on any surface. I once tried to compensate by tightening the hitch too much, but that only made the pivot point stiff and caused the rear wheels to lift slightly on rough spots. The safest route is to get a proper tongue‑weight scale or use a bathroom scale with a lever arm to measure and then add weight accordingly. Safety first.

I took a different approach and installed a weight‑distribution hitch instead of just tossing sandbags. It spreads the load across the front axle and dramatically improves stability. It was a bit pricey, but the ride is smoother and I don't have to worry about the trailer digging into the ground on soft trails. If you plan on hauling heavy boats regularly, investing in a good hitch can save you a lot of hassle.

From my experience, too little tongue weight can actually cause the trailer to fishtail when you brake hard. I once slammed on the brakes on a gravel road and the trailer swung side‑to‑side, almost clipping the ATV's side mirrors. I recommend checking the brake controller settings too—if the trailer brakes are too aggressive relative to the load, it can exacerbate the problem. Balance the brakes and add weight, then test in a safe area.

I’d add that sometimes the issue isn’t just tongue weight but also the hitch height. If the trailer sits too low, the pivot point changes and you get that loose feeling even with adequate weight. I raised the hitch a couple of inches using a spacer plate and combined it with a modest amount of weight in the bow. The result was a tighter feel without overloading the front axle. Just keep an eye on the ATV’s load rating so you don’t exceed it.