The A015058 diaphragm is a replacement part for 2 stroke gasoline carburetors. The black rubber sheet carries a central metal disc with five large and five small ports, and the fuel and air timing of the carburetor depends on that hole pattern. A sealing edge with mounting holes at the corners and a row along the bottom seats it into the matching recess in the carburetor. Replace the diaphragm when the rubber turns white and hard, fine cracks appear, the metal disc warps, or the port edges wear through. Handle the thin sheet with clean hands or a soft cloth, never a sharp tool, and when fitting it, wipe a thin film of engine oil on the sealing surface so it rebounds well and does not curl. A rough idle, a dull throttle, or oil weeping at the carburetor all start with checking the diaphragm first. The A015058 matches the carburetor's original part number, and similar numbers are not always interchangeable, so compare the old part's number and hole pattern before ordering, or send a photo to confirm.

 FAQ 

Q1: What is the A015058 diaphragm for?

It is a replacement diaphragm for two stroke carburetors: a rubber sheet with a central metal disc that sets the fuel and air timing, with a sealing edge and mounting holes.

Q2: How do I know if the diaphragm has failed?

Look for a rough wandering idle, a dull throttle response, or oil weeping at the carburetor. Remove the diaphragm and check it against the light for cracks, hard white rubber or a warped metal disc.

Q3: Will it fit my machine?

The A015058 matches the carburetor part number, and close numbers are not always interchangeable. Compare the old diaphragm's number and hole pattern, or send a photo before ordering.