I think that boat can be set up for either a 3.5 or 7.5. All depends on your budget. The engine trimming is the most important part to get it to run proper no matter what engine. Ron is right on the OS for the better choice if you can get your hands on a K&B. But K&B's are very popular & I have even seen new ones in the box for sale on this site in the marketplace. Ebay also has a good choice most of the time for new in the box engines.