Factorio Forums

TL;DR

Enable fuel leech for the default burner inserters.

What?

The inserter fuel leech (InserterPrototype::allow_burner_leech) was introduced in 0.17.69, but never added to the base game for burner inserters.

75864: Version 0.17.69 - Stable 1

FactorioBot wrote: Thu Sep 19, 2019 3:29 pm Modding

• Added 'allow_burner_leech' to inserter prototypes. If set to true, burner inserters will look in the pickup targets fuel inventory when refueling.

It's intended usage is to allow outputting burner inserters grab fuel from the machine they are outputting from.

Why?

Seriously, why?
There're mods to do so, BTW, but they do extra work affecting UPS: Mod Portal: Inserter Fuel Leech -- Discussion -- Working on 2.0 and UPS improvements

Currently, these horrible abominations are required to make a burner base on unmodded: Edit #1: Attachment re-uploaded after disappearing. See: 117527: Attachment disappears after submitting a post
Edit #2: Image replaced to a more appropriate as assemblers are no burner in the base game

See Also

• YouTube: I 100%'d Factorio in the worst way I could imagine | Antipatience -- a burner 100% "speedrun"
• Mod Portal: Inserter Fuel Leech -- Mentioned mod, currently not supported for 2.0. Dependency in SE official modpack
• Mod Portal: Burner Leech -- Same idea but supports 2.0 with no extra functionality
• API Docs: InserterPrototype::allow_burner_leech -- Property description
• 125744: Add "Read fuel" to burner inserters -- Related FR

It’s almost as if the “burner phase” was deliberately designed in a way so that burner inserters never have a reason to output out of a machine…