If you run out of fuel, you want to be sure everything is working properly first before starting the engine. Things to be checked are:

1. clogged in-tank fuel strainer (blow air back to clean it).
2. Clogged In-line fuel filters.
3. Clogged air filter.
4. Leaking fuel line.
5. Weak Starter.
6. Weak battery.
7. glow plug problem.
8. incorrect valve clearance or low compression.

Good luck

David