Small Engine Gets DIY EFI Upgrade
A DIY enthusiast upgraded a small internal combustion engine to electronic fuel injection (EFI). The project involved a Predator 212 engine and included custom components like a fuel cell and a Teensy 4.0 microcontroller. The build process is detailed on GitHub for those interested in similar modifications.
- ▪Carlos Takeshita upgraded a small engine from carburetors to electronic fuel injection.
- ▪The project utilized a Predator 212 engine and included a custom-built aluminum fuel cell.
- ▪A Teensy 4.0 microcontroller was used to monitor engine parameters and control fuel injection.
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Small Engine Gets DIY EFI Upgrade 2 Comments by: Zoe Skyforest May 18, 2026 Title: Copy Short Link: Copy Small internal combustion engines usually keep things simple, relying on carburetors to handle metering the correct amount of fuel and air. Recently, [Carlos Takeshita] decided his small engine could use an upgrade in the form of electronic fuel injection (EFI). The build began with a Predator 212, a popular gasoline engine from Harbor Freight. [Carlos] set about kitting it out with a missing tooth trigger wheel to measure the crankshaft position with a hall effect sensor. The engine also scored a custom-built aluminium fuel cell, complete with a high-pressure fuel pump and regulator suitable for driving the solitary fuel injector installed in the custom intake manifold.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hackaday.
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