Re: 2004 Nissan 9.8 hp Four Stroke
Welcome,You will get more and better help in the Honda/Nissan/Tohatsu section.
I can tell you the 8hp and 9.8 share the same parts book.The 15 is a different book.
In order for a simple carb change you would need to have a 9.8 be a choked down 15.
I'm pretty sure the 15 is a larger displacement shared with the 20.
