60" Bad Boy ZT Elite cooling fan vibration

Beanpole

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Aug 23, 2023
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Hi. First-time user. My Bad Boy mower with Kohler 747cc engine has a vibration coming from the cooling fan. I removed the grille cover to eliminate that as a source. I have always kept it free of debris. It does not happen at low rpms, only when it is at 75% or higher rpms. The mower is two years old. Has anyone had this problem? I would greatly appreciate any input. Thank you.
 

mechanic mark

Lawn Pro
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Jul 15, 2013
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Inspect fan for cracks etc. & loose or missing engine parts, reinstall blower housing after cleaning engine cooling fins.
 

Beanpole

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Aug 23, 2023
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Mechanic Mark. After taking the engine shroud off I used an air hose to clean the fins and everything else. I discovered two loose bolts. Tightened them and no more vibration noise. Thank you.
 
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