ModsJava
OpenBoatUtils
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
OpenBoatUtils
OpenBoatUtils is a client mod that gives server plugins an interface to modify boat physics. If you want to play with modified physics, you can join servers that support OpenBoatUtils (like frosthex.com and mc.boatlabs.net, where certain tracks have modified physics), or you can test the mod with commands in singleplayer.
Feature showcase:
There is more information about the features and how they work on the wiki.
For plugin developers, the wiki also includes documentation for the packet api.
Requires Fabric API.
Credits:
- BoatHub, for creating the original BoatUtils
- Pigalala, for help with porting to 1.21
- Kikugie, for maintaining stonecutter
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.9, 1.21.10, 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as OpenBoatUtils-0.5.1c+1.21.9-1.21.11.jar — drop this file into the mods folder
- Download size: 435 KB
- Download link checked 27 Aug 2026 — working
These come from our own check of the pack file, not from the source page.