Over the last few years , daughters FIL x585 that I mow with, has been overheating at times. Didn't matter the outside temp could be cold doing leaves and temp gauge would go near or on the red of the gauge.
Come down to the garage , take a water hose, spray some water from engine side toward the seat and temp gauge would go back to normal.
The owner even had his dealer check it a couple of years ago and could find no problem. Shop foreman even asked if when it showed hot did the engine shut off,,,no never has..
OK today while mowing for about a hour, happen to look at temp gauge and it is completely buried, way, way past the re line, like 1-2" guessing as farr as the needle could go.
So within 50' or so of his garage, raised the hood and drove it to his building. Gauge going no where, with engine running , sprayed some water toward the radiator. Still no change on gauge and noticed the overflow tank still at normal level, thinking this thing is not overheating. After a few minutes, cracked the radiator cap and then finally removed . Very little steam and no bubbling of antifreeze inside radiator. At this point had a senior moment even touched the antifreeze with finger, It's NOT overly HOT..Well at least to burn me. So that tells me engine is not overheating.
So either the gauge cluster or sending unit at the end of radiator hose. Or at least this is my thought.
So is there anyway to check the sending unit ?
Or is there something else that could be causing this . ?
Oh I did take the connection loose at sending unit and gauge went back to normal . After engine running maybe 3 mins pegged again, disconnected it one more time ,needle went to normal position , reattached , did the same thing. Ran the mower another 2-3 hrs ran fine , needle pegged.
Looks like sending unit around $50.00 new cluster close to $400.00
x585 has right at 900 hrs and 10 yrs old.
Thanks for any help..!