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#1
07-24-2025, 12:13 AM
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Pro Z 160L won't Start - Please help
I have a Pro Z 160 L, 60" with a EZT750 Kohler Confidant engine. It's older, but it only has 185 hours on it. Was mowing my yard about a week ago, everything was fine, and after about an hour of mowing it started to sputter a little bit, so I headed to the garage. Luckily i made it to the garage because after I shut it off it would not start anymore. I can't figure out whats wrong, been troubleshooting for about a week off and on when I am not working.
The engine turns over, has spark (put in new plugs and used a spark tester), and has fuel (I removed the fuel injectors and turned the key and fuel spurts out). I don't understand what is going on, it won't even sputter or fire at all. It just turns over and over. I have messed with the switches, but i don't think it is any of them because it turns over and has spark, right? Any help would be greatly appreciated, I am out of ideas. 
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#3
07-24-2025, 07:23 AM
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so I hooked up a compression tester to each cylinder, got 0 on one and like 30 on the other, but I didn't think it was legit. I read somewhere that a dual cylinder EFI engine like this probably has a pressure release or something, and also it only has 185 hours on it and it was running awesome now all of a sudden it won't even fire. Won't you lose compression kinda over time and start losing power gradually? would it be all of a sudden and on both cylinders? Do I need to take off the heads and look at valves or something?
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#4
07-24-2025, 08:11 AM
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maybe valves... sticking, bad lifter or bent rod.. Is this OHV? Pull the cover(s) and look see. Did motor overheat due to clogged fins or blocked grass screen?
__________________
Two 125's and a 124 all with 42" decks Plow blade #2 Cart QA36 snowthower
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#6
07-24-2025, 12:16 PM
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my grass isn't getting any shorter....... if I dont figure this out in the next couple days I will have to send it out to the mower shop, and that is the last thing I wanted to do, its going to cost me a fortune I dont have.
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