1954 5.5hp requires 2 line pressure tank, most maintainance part available at laingsoutboards.com i believe fuel/oil mix is 16-1 gas- tcw 3 outboard motor oil.
Thanks.....it is on ebay, has the original tank, supposedly bought new and still in the family....it looks good in the pics, I dont need it, just like it, and may sell it to my brother in law..........