I have a 2006 kawasaki mule trans 4x4 it gets gas spark plugs are firing but will not run

https://www.manualslib.com/manual/803081/Kawasaki-Mule-4010-Trans-4x4.html?page=37
You did not say what model you have
https://www.kawasakimotorcycle.org/forum/kawasaki-atv-mule/152674-2012-diesel-mule-4010-no-power-steering.html
https://www.kawasakiforums.com/forum/general-tech-9/kawasaki-mule-3010-trans-4x4-640/

Did you drain the carburetor at the end of the season, or shut off the gas valve and run the carburetor dry? If not, the issue is probably varnish and gum from the evaporated gas plugging up the carburetor. You will have to pull the carb apart and clean it.

Hey Keith, get a manual.. its easier than trying to "diagnose" on here.. Sorry..good luck.. kawasaki mule 1000 450b1 repair manual Google Search

Full tune up and carb clean .get new plug,air filter.oil Chang ,carb clean and adjustment.that should do it.,., try fuel filters and test fuel pump see if it's functioning properly.,.

There's a drain screw on the bowl of the carburetor - either run the gas out - or turn the valve to off and drain the gas in the carburetor. I also take the spark plug out and spray on top of the cylinder and all around - anything metal. GETSOME is a product out of Florida that actually works. Disconnect the battery and hook the battery up to a 2amp tender/not charger - you'll need the battery tender that keeps the voltage correct but doesn't over charge - reverse when the seasons change and you should be good to go -

Kawasaki Mule Update - YouTube

? 2:16
www.youtube.com/watch?v=Fw_jeQUU6Hw
Jan 25, 2013 - Uploaded by Penguinboy1995
solenoid is reading battery voltage and the constant hot, it is not sending the 12 volts from the switch to the ...

My lawn tractor with a Kawasaki engine had the same problem. I found that the linkage for the gas throttle had a lot of dirt on it and would not let the throttle close completely. So when I shut off the warm engine, gas leaked into the cylinder. It would take a lot of cranking to start. When it did start, the exhaust put out black smoke.

First is the engine Diesel or Gas?
if it is a diesel engine it has almost got to be a compression or fuel problem if it is a Gas engine it can be a valve adjustment, fuel, compression, or spark problem

Air leak .dirty air filter.,.fouled plug.,.bad gas.,.dirty carb?fuel injection? Bad fuel filter ,fuel pump test fuel pump that's the general stuff.go from there

Hello Anon..
First, I would check to make sure the carbs are getting fuel, and then fuel getting into the cylinders. Your question about low oil - did you let it get low and then it quit? ...
If you put oil into the cylinders and only got 100psi, this might be your problem. You should be pumping around 120+psi without putting anything into the cylinders... Recheck the compression.= .take out all spark plugs...screw the gauge in until the o-ring seats, hold the throttle wide open while spinning the engine over for about 5 seconds... you should get 120psi +/- 10psi.
If you are getting less than 100psi.. it might be time for a rebuild..