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That's a Class 3, which is what the OP most likely has. If so, he's only good for 500. He needs to look on the hitch.
Since we're on this topic I have a question. I have a 6x12 trailer that weighs about 1400lbs single axle and I usually tow it with less than 2000lbs inside. With this info would you say my tongue weight is over 500lbs without measuring? I've never had an issue with sagging or anything