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#1
07-21-2025, 08:06 AM
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2005 Cub Cadet LT1042 Slight Knocking Noise
Hopefully this is not a rinse and repeat thread. I have a 2005 Cub Cadet LT1042 with only 225 engine hours on it. I noticed recently that there is a slight knocking noise when running but it seems to be intermittent while running. I checked all the issues know to this situation and cannot find anything related. Things I have gone over such as Engine Frame and Head Bolts, Deck Spindles, PTO assembly etc...and cannot find anything loose.
No engine case cracks or oil leaks as well. I take excellent care of the mower and due its routine maintenance. It sounds like a rod bearing but I could be wrong. No flywheel key issues all seems tight under the hood. 
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#2
07-21-2025, 08:51 AM
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The only thing that I can offer is that the infamous Kohler Courage engines are known for the bolts (#13) holding the top and bottom crankcase halves together come loose and eventually the case cracks,
but I do not know if any sounds precede the upcoming disaster. Something you could check.
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#4
07-22-2025, 07:39 AM
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One thing you could do is remove your deck entirely and drive around and see if you hear it. If it goes away you have likely eliminated an engine issue. A bit of a work but also a good time to do some deck maintenance.
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I did the deck maintenance in the spring BTW
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