I have a 1979 Hyster H30E with a Continental F163 engine.

The other day it was hard starting but fired up. After I turned it off and then on again it failed to start.

After trying a variety of methods, I found that I was able to get it running while continually pressing the primer button on the Impco Model J convertor and covering a 1/4" barbed tube coming out of the convertor with my finger...all while feathering the gas peddle.

So my question is what is the likely problem that is happening?

Is there a tube that is suppose to connect to the barbed fitting on the Model J convertor? If so where else is that tube suppose to connect?

Thank you!