I bought this a month ago at the Yamaha dealer, Oneida Lake Marina, for a $150 used. He told me it was the heavy duty 4stroke model. At first glance it does look like it and I did not notice the top sticker. So I looked it up online http://www.garelick.com/product.php?pnumber=71033 and it is on the limit of what I need so I just ordered what I orginaly was looking for and so I am looking to sell this one. I would like to to get my money back 150 for it. I am willing to ship it if need be. I'm located in Newfield, NY. I'm planning on going to Basspro tomorrow afternoon. If that helps. My #is 607 351 2137. You can call me anytime or PM. I will be up all night.