Weighing your hull? Methods?

[towman2277]

Fellas, I know I can talk and ask 2000 questions, but I'm learning, and won't ask the same one twice!! :D
When you weigh your hull, considering its fully rigged in the driveway now, do you weigh it all at a "trucker's scale", then go throw it in the water, and weigh the trailer by itself, then deduct the "known" motor weight?? Is there a hidden trick to any of this? I know, silly question, right?

[dynobo]

YEP. That's pretty much how you do it.................

[Burke Kilgour]

There was a method where you weigh the tongue of the trailer, then move the boat back on the trailer and re-weigh the tongue. You then plunk these numbers into a formula and voila!! your boat weight.
I'll take a look for the formula for ya. ;)

[Burke Kilgour]

Here it is.............
http://forums.screamandfly.com/forums/showthread.php?t=29309&highlight=weigh+boat

[towman2277]

Thanks for the formula....I called a "geek" buddy who is too smart to change a spare tire ( yaw' know the kind!) and he said that formula will work, just gotta measure it very correctly!! :D

[Burke Kilgour]

I haven't tried it myself, but it's "supposed ta" work. LOL :D
Let us know how it works out.

[towman2277]

I'll do it tommorow, and If I feel like it doesn't sound right, i'll also do the "scale" method and see just how close the two figures are....:D

[Ted Stryker]

The formula works, My Brother and I weighed 3 of Our boats on the same day and all the weights came out to be very close to what they were supposed to...

[Bartman39]

Might find this useful...? Only problem is the limited use time...?

http://www.iboats.com/b/

[chynewalkr]

ive used the trailer tounge method for a couple boats and it comes out pretty close to what it should be

[Techno]

Weighing the whole rig, then the trailer is the easiest and best but not always possible.
When you do this though you don't subtract the engine since its part of the boat. You want the boat to be its heaviest. Full tank anchor and everything you'll likely carry.
Hull weight would be the opposite and everything not the hull is subtracted or removed.
My hull with floor is 560 lbs and rigged is expected to be 1250 lbs
With the engine on the tongue was 30 lbs and with it off its about 260 lbs. I stopped picking it up after finding that out.:D

[towman2277]

I did the formula, and my hull weighs 1170 with the calculation.

I then weighed it at the scale, then threw it in the water, weighed my trailer, deducted my motor weight and WALA! 1145 true weight....a lot less then I guessed earlier. :D :D :D

[Techno]

Another tip is if you weigh the boat at scales record the trailers weight.
Record it somewhere it won't be lost like your puter or something.
I have the weights of my bare hull and trailer when I weighed it at work. Now I can find out the new total boat weight just by repeating and subtracting the known trailer weight.

Which brings me to point 2. These trailers should be a known constant. Mine is home made so isn't. But others have identical trailers to others and this would simplifiy a truck scale weigh in. I don't know how dependable the registration is for that.:confused: