Just Enough Mekanism Multiblocks guide for FTB StoneBlock 4 1.9.0 to 1.20.1

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Just Enough Mekanism Multiblocks guide for FTB StoneBlock 4

Written for FTB StoneBlock 4 1.20.1 · also fits 1.9.0 to 1.20.0 · updated Oct 15, 2026

Last verified for FTB StoneBlock 4 v1.20.1 on Oct 15, 2026 · text last changed Oct 15, 2026

A newer release (1.23.0) is out Guide for the current version

Also applies to:All the Mods 10 0.32 to 8.1All the Mons 0.3.0-beta to 1.3.0FTB Skies 2 1.9.0 to 1.24.0FTB Skies 2: Aero 1.0.3 to 1.10.0

Sections
4

None of these sections are written for this pack; 4 are shared from another pack's guide.

Every recipe and number here was checked against FTB StoneBlock 4 1.20.1's own files.

What is Just Enough Mekanism Multiblocks?

Same as in the All the Mods 10 4.14 guide

Just Enough Mekanism Multiblocks is part of this pack at version 7.11, shipped as the 1.21.1 build of the mod. It has been in the pack since version 2.16 or earlier, so it's a long-standing part of the mod list.[1]

Unverified The sources I have don't describe what the mod does or who it's aimed at, so I can't confirm its features from them. Going by the name alone, it looks like a Mekanism multiblock helper for JEI, but that is unconfirmed here. Check in-game before relying on it. This site does hold FTB StoneBlock 4's own recipes, read from the pack itself: look the item up in the item browser.

Unverified I found no confirmed recipes, config options, quests or ATM Star path steps for this mod in the sources. Don't assume it gates any progression until you've verified that in-game.

How do you get started with Just Enough Mekanism Multiblocks?

1 part

Same as in the All the Mods 10 8.1 guide

Here's the honest starting point for this one: Just Enough Mekanism Multiblocks doesn't give you a crafting path to follow. Judging by its in-game text, it's a planning helper for Mekanism multiblocks, not a machine you build. So there's no first-items list to run through.[2]

What the mod's text tells us

The text includes two building entries, Better Fusion Reactor and Reinforced Induction Matrix. It also has import and export messages, including an option to import from the clipboard. That suggests you can share or reload a layout you've worked out.[2]

The results and tooltips are mostly about fusion reactor planning. Here's what the text mentions:[2]

  • Result lines for Energy Per Antimatter and Required Heater Usage, with the heater usage tooltips split into the coldest and hottest biome.[2]
  • Counts for Heating Elements and Supercharging Elements.[2]
  • A note that a heater must be placed right next to another named part.[2]
  • Reminders to set the reactor's Injection Rate to a specific value, and an entry for the reactor's Burn Rate.[2]
  • Warnings that the reactor will be damaged or that water will be lost, plus a readout of the time from 0% to 100% damage in ticks.[2]
  • A production-per-flow readout and a steam height note, described as the distance from the ceiling to a named part.[2]
Tip: Treat those tooltip warnings as a checklist. If a result says the reactor will be damaged or water will be lost, rethink your design before you build it.[2]

Unverified How to open the mod's screen, which Mekanism items you need first, and any pack-specific changes are not confirmed by the available sources. No quests or recipes in this pack involve the mod, so there are no recipe blocks here.

How does Just Enough Mekanism Multiblocks work?

3 parts

Same as in the All the Mods 10 8.1 guide

This mod doesn't add machines or blocks of its own. Everything the sources show is text for a planning and information display built around Mekanism multiblocks, mainly the fusion reactor and the induction matrix. That means the mechanics below are things the tool reports to you, not systems it adds.[2]

What it can plan

The building options are named "Better Fusion Reactor" and "Reinforced Induction Matrix". These are the two multiblock layouts the sources mention.[2]

There are also import and export functions. You can import a layout from the clipboard, and the tool confirms with "Imported successfully" or "Exported successfully". Use this to share a design or bring one in.[2]

Fusion reactor readouts

The results screen reports a few values for a reactor design: Energy Per Antimatter, Required Heater Usage, and the number of Supercharging Elements. The specs list also shows how many Heating Elements the design has.[2]

Required Heater Usage is given for two cases, the coldest biome and the hottest biome. Biome temperature changes how much heating the design needs, so check both figures before you build.[2]

Some tooltips are tied to the Burn Rate setting, so the displayed values apply at a specific burn rate. Another tooltip says you need to set the reactor's Injection Rate to a particular value. Set it to the number shown, not just any value.[2]

  • Placement rule: a heater must be placed right next to its sink. The tooltip names both parts, so follow the pairing it shows.[2]
  • Production per flow: the tool shows a production figure for each flow.[2]
  • Steam height: the tooltip gives the distance from the ceiling to a named component, which tells you how high to place it.[2]
  • Damage timing: a tooltip shows the time from 0% to 100% damage in ticks.[2]
Watch out: The tool can flag a bad design. Watch for the warnings "Reactor will be damaged" and "Water will be losing". If either shows up, rework the design before you build it.[2]

What the sources don't cover

Unverified The sources contain only interface text, so the formulas behind these values, the exact numbers, the layout rules, and any item, power, fluid or automation handling are unverified. This pack also has no config files for this mod, and no recipes produce its items.

Which Just Enough Mekanism Multiblocks config options matter?

3 parts

Same as in the FTB Skies 2 1.23.0 guide

This mod has one config file in the pack, the client file at multiblocks.mekanism.boiler.visible and its siblings. Every option in it is a simple on/off switch that controls whether a multiblock gets its own page in the recipe viewer. Because it is a client file, it only changes what you see on your own screen.[3]

In this pack, every one of these switches is set to true, so all the multiblock pages are shown.[3]

Base Mekanism multiblocks

Mekanism Generators multiblocks

Addon multiblocks

Tip: If a multiblock page is cluttering your recipe viewer, set its visible option to false in this file. Everything is shown by default in this pack, so you only need to touch it if you want to hide pages.[3]

Unverified The sources do not show the mod's own default values, so it is unverified whether any of these switches differ from the mod default.

Sources

  1. All the Mods 10 4.14 mod list · pack file
  2. jei_mekanism_multiblocks tooltips and descriptions (English lang file) · official mod data
  3. FTB Skies 2 1.23.0 config: config/jei_mekanism_multiblocks-client.toml · pack file
Where this guide comes from

Written from what FTB StoneBlock 4 itself ships: its files and recipes, the in-game guidebooks and the mods' own pages. Every statement links to the source it came from, and the numbers are checked against the pack before publishing.

Guide last verified Oct 15, 2026.

Guides for other versions: 1.23.0 · 1.22.0 · 1.21.0 · 1.1.1 to 1.8.1

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