Adjust regulator gas range oven?

Bought a used free standing gas range. Hooked to natural gas. Lights, but very low preasure to burners and oven. There is a regulator. Is that adjustable?

If your gas pressure is ok and since the whole range
is affected the unit has most likely been converted
to LP gas. If this is the case then basically what you would
need to do is reverse the conversion that they speak of in the instructions.
Since the range is used the other owner probably threw away
or lost the original natural gas orifice spuds which thread into the end
of each stove top burner valve, so you would need these to convert them back.
Part Details - WHIRLPOOL Spuds, natural gas (kit of 4), part number: 814391

Here are the installation instructions for the range.
Gas conversion is towards the end.
http://shared.whirlpoolcorp.com/assets/pdfs/literature/Installation%20Instructions%20-%208053705.pdf

I did order this spud kit. The orfice is much smaller than the ones that are in it now. The link to the instructions provides some options for the regulator also. Thanks for your help.

Keep in mind I’m just assuming its been converted to LP.
Without seeing the appliance I cant know for certainty.
If its been converted to LP you will need to reverse
every step that the conversion instruction give.
This includes the regulator and the adjusting the orifices
on the oven and broiler burner valves.

LP runs at a higher pressure than natural gas.
So when running natural everything has to be set to restrict
the pressure “less” in order to get the same flame size.
The spuds for natural gas should have a slightly larger
hole in the center than ones used for LP because of the difference
in pressure.

Followed insturctions to convert from LP to Natural Gas. Top burners work good. Oven lights, flame goes from centered burner to outer edge, 12". Seems really hot. It does not cycle on and off. Just stays on full blast. Is a new termostat the best place to start?