Should this be under my generator?

[TEO]

My onan 5500 gen has shutdown twice while driving once on the freeway and once while driving roads at 45-50 mph both times with the 36 code.
It has never stopped while sitting still, I did some research online and read about having to much oil and also getting to hot and having fuel issues "vapor lock/fuel pump/fuel filter"
Both times this has happened it was over 100* here in town.
Today I pulled out a little oil still showing almost halfway between full and add and brought it to my house it ran sitting out front for an hour at least then drove it back to were I store it and it ran the whole time. The temperature Today was under 90*
The Gen itself seems extremely hot to the touch and was wondering if this shield under the Gen is supposed to be there? It looks a little homemade-ish. Not sure we're the intake for cool air is but wondering if this shield sending the hot air to the intake and heating everything up even more?
Gen was surfaced a few weeks ago when I got the coach it has 315hrs
All new to this so any comments or suggestions welcome.
First image is upside down and last one is sideways, not sure why.

 

[Rollin Ollen]

Ours is wide open underneath. I think your air flow may be restricted. When we are parked on grass for a while, the area beneath the Gen becomes very dry and the grass brown quickly so there is a lot of heat being pushed out. That may be the reason the shield was installed on your rig. How easy will it be to remove the shield?

 

[TEO]

Ours is wide open underneath. I think your air flow may be restricted. When we are parked on grass for a while, the area beneath the Gen becomes very dry and the grass brown quickly so there is a lot of heat being pushed out. That may be the reason the shield was installed on your rig. How easy will it be to remove the shield?

It should be simple to remove just a couple screws.
It's actually 2 pieces with some silver tape were they meet, the one piece definitely looks homemade as the end isn't cut straight and smooth.

 

[MemoriesByTheMile]

We have a larger gen, but its radiator is open below to allow for air flow.