Jim,
1. Go to marine.honda.com/parts
2. then select service & support
3. then select parts & accessories
4. then select parts
5. plug in your engine serial number or full model number
The fuel filter you are talking about is in the Vapor Separator section of the parts and is called "screen, fuel strainer". The Honda part number is probably 16911-ZY3-010, however it is best to put in your engine serial number to make sure
Dick