My kawasaki mule keeps blowing the hose off of the thermostat housing. I did a compression check and both cylinders were approx 175 psi. There is no thermostat installed and resevoir is blocked off. What is causing my problem?

I assume there is only ONE fuse, since you are not specific.
The solution therefore is just hard work and long hours with your ohmmeter disconnecting wires and tracking it down one wire at a time.

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

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

I would be having a compression test done to confirm that there is no head gasket or cracked head problems as what you describe can only be coming from excess pressure in the coolant system from compression pressure.

if its firing ok on other cylinders, unlikely to be pump or fuel filter, focus on electrics, plug, ht lead etc

contact the parts store for specs they should have it on the computer system under overhaul specs..ask for a printout of rebuild proceedures..

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..

GOOD COMPRESSION SHOULD BE 120 - 175 PSI IF COMPRESSION 100 PSI ACCEPTABLE. 90 PSI LOWER CYLINDER WEAK IF COMPRESSION 50 - 20 BLOWN HEAD GASKET.

leaking valve or head gasket leaking

underneath the top rad. hose on the engine.