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Old 05-19-2018, 11:58 AM
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I don't think 1 hp short is significant. It might be if you are breaking tough sod.

In this old thread I have pictures of the 54" tiller that was sold in Japan matched to my 20 hp (pto) Yanmar, and the 15 (pto) little Yanmar I actually use the tiller on. The little guy is working at full load and can be stalled occasionally so it's clearly underpowered for this tiller at 25% short of recommended hp, but your 4% variance doesn't sound serious.

You can take less than a full-width cut if you occasionally hit a difficult patch.
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