I have a Honda HRT216SDA mower that I am having a problem with; that I
hope someone can help solve.

It starts fine but after about 30 seconds it quits. It seems like it
runs out of gas. If I let it sit dor a miniute or two it will start
again but run no more that ~30 seconds.

The gas is clean. The float in the carburetor is not stuck, carburetor
is clean. All linkages look fine.

Anything else I can check?