Can you hear the fuel pump clicking when you turn the key on?
Yes. This morning I filled her up with fresh diesel and mowed without a hitch for about 5 minutes then the cycle started - bog down, almost quite and then come back up. It came back up faster if I took off the load. This evening the same scenario, worked fine even on a hill for about 10 minutes and then. How much fuel am I supposed to see in the forward filter? It's barely 25% full.