boat sway behind tow vehicle

Status
Not open for further replies.
Jun 16, 2010
29
Hunter h23 slidell, la
Is it too little tongue weight the reason a boat wiil start to sway normally. I moved mine to storage until I can come back and get it to go to fl.
 

MrUnix

.
Mar 24, 2010
626
Hunter 23 Gainesville, FL
Yes.. too little tongue weight will cause the towed vehicle to sway (fishtail). Too much tongue weight will make it difficult to steer. Ideal tongue weight should be about 10-15% of gross weight (boat+trailer+gear).

Cheers,
Brad
 
Oct 3, 2006
1,029
Hunter 29.5 Toms River
I moved the axle on my boat's trailer - I had an F150 4x4 and the max tounge weight was "500 lbs" . Well, I don't have a scale to weight a whole trailer, but a can stick the tounge on a 2x4 between two "human size" scales and add them together to get the tounge weight.
Stock it was about 150, I went backwards until I got more like 300, and it towed so, so much better.
 
Feb 26, 2004
161
Hunter 23 Lake Keystone, OK
I have to get my h23 all the way forward on the trailer. A few inches makes a big difference in the sway.
 

RichH

.
Feb 14, 2005
4,773
Tayana 37 cutter; I20/M20 SCOWS Worton Creek, MD
If moving the weight forward does not dampen the sway, consider having the drawbar lengthened.
There is a 'magic ratio' of drawbar length (distance from axel to hitch) to 'track' (distance that the tires are apart) that reduces sway instability --- drawbar length to track @ 3:1. The longer the drawbar over that dimension/ratio, the less the instability.
 

caguy

.
Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
Do you leave your motor on the boat while trailering? On my Mac 25 I used to notice the difference.
 
Jun 8, 2004
10,532
-na -NA Anywhere USA
I have towed many different brands of boats over the years as a but now retired dealer to include ComPac, Precision, Hunter, Catalina, Beneteau, MacGregor and so on.

Many manuals will say emphatically at least 10 of the towing weight should be on the tongue of the trailer attached to the tow vehicle. What many do not realize, less than that, in essence you are raising the back end of the tow vehicle, thus in a sense loosing traction and in some sense towing capability. That can be dangerous. A good example is that F150 truck with no weight over the rear axle will simply spin its tires when pulling out on a wet ramp unless it is a 4 X4 that is engaged. Then you have to add weight over the rear axle.

On some trailers, you can move the axle back but on some for example the Hunter 23 wing keel from KWS, the axle was welded to the trailer so putting weight in the V berth was mandatory for my customers.

As for the motor, never leave the motor in the up position on the outboard motor bracket when trailering is what I use to preach but I did instruct tying the motor handle up with a line onto the back of the boat so it will not bounce up and down which over time could damage the transom.

crazy dave condon
 
Status
Not open for further replies.