Measuring tongue weight

Dave Abrahamson

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May 8, 2003
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When you measure tongue weight on a floor scale, do you measure from the wheel jack or do you measure from the tip if the tongue with a 2X4 or something? I would think the distance from the jack to the end of the tongue would account for some weight difference.<br />TIA<br /><br />Dave
 

Silvertip

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Sep 22, 2003
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Re: Measuring tongue weight

Yes - put the coupler on the scale using a block of wood to make sure the trailer is level.
 

brine

Petty Officer 1st Class
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Jul 24, 2005
Messages
262
Re: Measuring tongue weight

The weight you would get at the tongue will be less than the weight at a jack. The tongue weight will be equal to:<br /><br />Jack weight x axle to jack length divided by axle to ball length<br /><br />IT CAN BE DANGEROUS PROPPING UP TONGUE TO WEIGH. (unless you want to make a decent bracket to take the weight when you lower the jack) :) :)
 

Pony

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Jun 27, 2004
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Re: Measuring tongue weight

well you could also raise the level of the scale.....like putting it on a bench or a cinder block with a piece of plywood on top to act like a table.(just shim it with 1x6 or 2x4 scraps until you get it level) that is at a height that would make the trailer level.
 

phantoms

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May 14, 2005
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Re: Measuring tongue weight

Jack up the trailer past level with the trailer jack, assemble whatever you're going to use between the scale, ground, tongue, and then let the jack back down until it's just free of the ground. The weighing assembly should have been measured out so the trailer is level at this point. Record your measurement and be confident that if something should fail in your weighing assembly, that the jack is just off the ground and will catch your trailer.
 

notarealone

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Joined
Oct 21, 2005
Messages
36
Re: Measuring tongue weight

If you don't have access to a scale that goes up high enough for this measurement, here is something I found on the internet one day.<br />Measure the height of the scale you want to use, such as a bathroom scale. Now find a 2x4 about 18" long and a block of wood or something that is the same height as the scale was. PLace the 2x4 completely across the top of the scale and out onto the block. Now set your jack onto the the middle of the 2x4 and read the weight. Then multiply by 2. Works everytime.
 

rwidman

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May 27, 2004
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1,396
Re: Measuring tongue weight

Originally posted by Dave Abrahamson:<br /> When you measure tongue weight on a floor scale, do you measure from the wheel jack or do you measure from the tip if the tongue with a 2X4 or something? I would think the distance from the jack to the end of the tongue would account for some weight difference.<br />TIA<br /><br />Dave
You are correct. The "tongue weight" is measured at the coupler, the same place the trailer connects to the tow vehicle. And the trailer should be level when taking this weight.
 

EdBB

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Oct 27, 2004
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5
Re: Measuring tongue weight

Here's a quick way to get an idea of what the tongue weight is on your vehicle. It assumes that you know your own weight.<br /><br />1. With no weight on the draw bar of the vehicle, measure the height of the bar above level ground. It doesn't matter whether you measure from the top or the bottom of the bar, as long as you use the same point consistently.<br /><br />2. Now stand on the draw bar yourself and measure the height of the drawbar above level ground. In my case, I weigh about 200 pounds. The difference between #1 and #2 is how many inches a 200 pound weight on the draw bar pushes the bar down.<br />For example, if I push the drawbar down 2 inches, then that means about 100 pounds per inch.<br /><br />3. Hitch up your boat and trailer to the draw bar and measure the height of the drawbar above the ground. Suppose it pushed the drawbar down 3 inches.<br /><br />4. Calculate the weight of the boat and trailer on the drawbar by comparing the measurements in #2 and # 3. Using the examples above, that suggests that the tongue weight is about 300 pounds.<br /><br />5. This doesn't require subjecting a set of bathroom scales to excess weight ( assuming that your own weight fits within the limits of the scale).<br /><br />6. This method, like all the others, assumes that you know approximately what your loaded boat, motor and trailer weigh. This is important to ensure that your tongue weight is in the appropriate range.<br /><br />HTH,<br /><br />Ed
 

wgander

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Mar 26, 2004
Messages
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Re: Measuring tongue weight

I just paid $10 to use the scale at a moving company. First I weighed the trailer with the boat on it. Then I hitched the trailer to my van and weighed just the trailer axle. The difference is tongue weight.
 

rwidman

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May 27, 2004
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1,396
Re: Measuring tongue weight

Originally posted by Bill Andersen:<br /> I just paid $10 to use the scale at a moving company. First I weighed the trailer with the boat on it. Then I hitched the trailer to my van and weighed just the trailer axle. The difference is tongue weight.
The simplest and most accurate way to do it! ;)
 
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