To the OP
Per the Ansung web page -
Home you bought the following;
ER Series Features
ANSUNG LOADER MODEL : ER062 / ER074
• High strength and longer lasting durability by specially designed side gear drive
• Light weight more than the same description
• Field selectable Cat. 1 type lower hitch
• Standard Slip-Clutch shaft to protect tractor
I have the YJR 074 and it is built like a tank and I am sure its weight is what they say. Its a fantastic tiller and does what I want it too. I am also running it with a lot less HP than what they recommend - a plus in my book.
Add some weight (concrete blocks, barbell weights, etc) to bring it up to what you think you need and get on with your work. You have not mentioned if you have used it yet, or actually weighed it yet. Personally their web page says it clear. "light weight unit". Manufactures change their specifications frequently.
Sorry - no offense - I call it as I see it.
It will probably do what you need it to do, or ship it back to the folks you bought it from and get on with your life.
Wishing you the best for this Holiday Season
Keith