That float needle seat part number has been updated to 396522.
375985 – Part Search Results – MarineEngine.com
Having rebuilt a QD-15 carburetor with the 439071 kit, it worked fine. These kits are for many different size motors, so the larger orifice may cater to the larger horsepower, yet it still works on as low as the 3-horsepower model. I’m guessing that OMC was simplifying for the purpose of a universal kit.
Improvise-Adapt-Overcome
