My stock fitting got broken. I made up a new one that goes from the pipe thread in the manifold to a piece of steel line that I attach the hose to.
I'm assuming that's what happened to mine, ol' farmer fred fixed it by screwing in a piece of pipe, capped the end, and drilled and tapped the cap to accept a compression fitting with a short piece of copper line that the rubber line slips over.....
Again.... anyone know of some one who sells this fitting or do I need to try McMaster Carr?