How much capacity do you want? Might look for a Moeller Marine Portable Fuel Tanks | Moeller Marine portable fuel tank. I have a 3 gallon on my dinghy with a 9.9 hp Mercury outboard. They come in various sizes for example:
3 gallon: Amazon.com : Moeller Ultra3 Portable Fuel Tank, 3 Gallon with EPA Cap : Boat Fuel Tanks : Sports & Outdoors
9 gallon: Amazon.com : Moeller 9-Gallon Portable Fuel Tank : Sports & Outdoors
Hi! Thanks, I'll take a look at Tohatsu as well.If I'm not mistaken, the small Mercury outboards are identical to Tohatsu outboards, so you could try them too.