1925 Star F should have Tillotson MV-1B or MV-1A on the W5A engine. Replacement new Zenith is 68-14544

http://www.thecarburetorshop.com/PkitS.htm#PSTAR

Where Are You From? Ottawa Ont Canada

Do You own a car built by Durant? 1932 614 sedan made by Dominion Motors

The Tillotsen carbs are often available on eBay. I find it to be better than the Zenith. Also, I had to flip the throttle on the Zenith to make it compatible with the linkage.

Where Are You From? North of Golden Gate Bridge

Do You own a car built by Durant? 1925 Star