Please see the following specifications for the cover: approximately 28.75 in. L x 18.5 in. D x 24 in. H.
Bot sure the size of that, but it does have strap adjustment on bottom to ensure it wraps the bottom.
There is a GENCOVMC - it will fit the GEN4000. There is also the GENCOVER-L that is waterproof.
Width for sure, length I'm pretty sure it will fit. It fits loosely over mine( 28.5WX25"long) but I have not measured it. It does have draw cords to tighten it up around the bottom.
It is made to fit that generator and ones that are that size.
Look at a box. How long is the box? How wide is the box? How high is the box?
I would imagine so. I have a 4000, and it is well oversize for it.
Fits 7000 Watt Generators size: 28.75" x 18.5" x 24"