Re: NS15B2 Looking for Carburetor Kit or parts to rebuild
The B2 carb is quite different from the D2 carb. Different casting, different bowl, different float, etc. The only real "gasket" for the B2 is the bowl gasket. The early B2's had a cylindrical bowl with free-floating "donut-shaped" float, and almost nothing is available for those carbs. The later models (depends on serial number), had an "octagon" bowl, and hinged float. The gasket for that carb is: 350031210M, GASKET, FLOAT CHAMBER, $4.85, and is still available. OTOH, if you need bits for the integrated fuel pump, some are still available.