Every one of the planes by any manufacturer on the market is designed to accept a wide array of usable engines. Weights differ substantially between one engine manufacturer and another in engines of the same size and class. Not one of the planes is designed around a specific wing loading and all of them will fly very nicely with a couple of pounds difference between them. The Sukhette is also one that is not limited to a single weight. Too many worry far too much over minor differences in weights when in truth sometimes the plane that weighs a few ounces more flies better than the lighter one. In tumbles the heavier plane performs better.

The difference in wing loading between the Fuji and another engine is not a factor. Your engine will be just fine.