Well I have a new (to me) GT-18 Hydro 917.257070. It has led a rough life and I'm doing some of the "routine" maintenance that has been ignored for some time.\n\nI disassembled and soaked and cleaned the carb. I reassembled with the old gaskets and float and it ran great, for a while. It now runs like poop.\n\nThe next to do items are new fuel line from the filter to the tank, and a float for the carb (it has the "original" foam type float).\n\nI have searched and it is recommended to buy the brass float.\n\nMy question is: should I buy the Onan brand float with the assist spring or can I buy the knock-off and get the same results?\n\nThe Onan float is about $50 and includes an "assist" spring. http:\/\/onanparts.com\/index.php?main_page=product_info&cPath=1_12&products_id=287\n\nThe "off brand" float is on eBay. It runs about $25. http:\/\/www.ebay.com\/itm\/ONAN-146-0380-CARBURETOR-FLOAT-BF-BG-B-43-B-48-\/120821948682?pt=LH_DefaultDomain_0&hash=item1c218ca10a It appears to be compatible, but does NOT have the float spring.\n\nDo I NEED to spend the extra $25 for the spring? Has any one bought the knock-off and then had to replace it with the onan to get it to run right?\n\nI'm torn...\n\nThanks for your responses.