cmosier1
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- Nov 6, 2025
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Sorry if this is long but the details seem important. I took my ex mark laser Z 60 inch mower to the shop to have the blade engage switch repaired. I had them do a general service, including an oil change as well. I had an oil leak that I asked them to look at during the service.
They said that the part that the oil filter screws into seemed to be the issue. They replaced it and put in a new O-ring. Once I got it back, I mowed my lawn, put it in the barn. No oil leak visible. No oil on the floor after a couple of weeks.
About a month has passed and I got it out to use it again. Pretty sure this was the 1st mow since the day I got it back. About an hour into my mow it started running rough. I thought that it was bogging down due to high grass so I upped my throttle a little bit and after about a minute or two of it, not getting any better, I parked the mower and got off to see what was going on. There was a large amount of oil on the back of the mower and before I could move to turn the mower off the engine died.
I called the repair company and had them take it back in to see what happened. They are saying that the oil line going to the oil cooler burst due to rubbing, which is what caused all of the oil to go out of the machine. The engine is now toast and will have to be replaced.
I’m just having a hard time reconciling the idea that with no visible leaks on the mower before I started using it, and showing full oil on the dip stick, that this oil cooling line would just spontaneously explode with no warning so badly that it killed my mower. Has anyone experienced this before any thoughts?
They said that the part that the oil filter screws into seemed to be the issue. They replaced it and put in a new O-ring. Once I got it back, I mowed my lawn, put it in the barn. No oil leak visible. No oil on the floor after a couple of weeks.
About a month has passed and I got it out to use it again. Pretty sure this was the 1st mow since the day I got it back. About an hour into my mow it started running rough. I thought that it was bogging down due to high grass so I upped my throttle a little bit and after about a minute or two of it, not getting any better, I parked the mower and got off to see what was going on. There was a large amount of oil on the back of the mower and before I could move to turn the mower off the engine died.
I called the repair company and had them take it back in to see what happened. They are saying that the oil line going to the oil cooler burst due to rubbing, which is what caused all of the oil to go out of the machine. The engine is now toast and will have to be replaced.
I’m just having a hard time reconciling the idea that with no visible leaks on the mower before I started using it, and showing full oil on the dip stick, that this oil cooling line would just spontaneously explode with no warning so badly that it killed my mower. Has anyone experienced this before any thoughts?