Fuel filter change, now no start

[SquareOne]

Also check voltage while cranking. You mentioned the starter being 'weak', but you could possibly have an issue with one or more of your batteries depending on there age. See how far it drops when cranking. You may just have a low voltage issue causing the no-start.

----> BTW , a weak starter will pull a $hitload of amperage when compared to a new, healthy unit