How long is the hose between your barrel and motor?
Very short, with the hose on [I'd estimate 6"], it barely scrunches by the motor inlet when installing or removing ,,, But thats the way I want it.
Hose has some springy flex of course, so I scrunch it down, when it is directly under the inlet I let it back up and it seats perfectly, and I spring clamp it in place.
I could have made the motor sit up higher, but then the motor outlet would not have been properly aligned with the filter inlet [which is very tight at that end as well, almost touching in fact]. Just enough room to get a short length of hose between them and slide over each housing, then clamped in place as well.
My setup was determined by my determination to use the included metal cart, else I probably would have designed a bit more slack into it if I designed and made my own.
Some might be nervous of a heavy motor bolted vertically to a wood sheet, no worries there.
3/4 plywood and 6 bolts are more than enough to hang it forever, and it is not top heavy at all. I have tried to tip it to see how much it will take, there is no way it would tip on its own. Didn't need help lifting when installing either, I installed the motor with the cart on its back, when the motor was bolted in I simply tipped it up and rolled it into place.