Join Date: Aug 2018
Location: Lowell area, MA
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Researching the EF2000iS vs EU2000i a few years ago, the Honda had a bigger engine (99cc vs 79cc). This helped it deal better with sudden surge loads (like starting a compressor, etc). And the Honda was able to run above the rated 1600W output (but below the 2000W) for a half hour, vs about 30 seconds for the Yamaha.
The EU2200i increased from 99cc (EU2000i) to 121cc. The Yamaha EF2200iS remained at 79cc, like the EF2000iS.
I have heard great things about the Yamaha quality. I'd prefer to not have a timing belt in my Honda, due to wondering how it will fare in 10+ years. And for the 2000W versions, the Yamaha was quieter at idle, I think, with the smaller engine, though it became louder at a full load. But depending on how you expect to load it, things like engine size and surge ability may be considerations.