jungpeter
Guru
My relatively low-time (~400 hrs) Kohler 6EKOD genset has a persistent shutdown after about 45 minutes of operation. The data panel exhibits a low-speed shutdown error. After clearing the error code, the genset will restart, but fails again within minutes with the same error code. The manual states to "consult a Kohler professional" to diagnose this problem.
In an attempt to address the problem myself, and assuming the issue was fuel-related, I changed both the primary Racor and the on-engine secondary fuel filter elements. This genset has an electric fuel lift pump. There is a menu-driven "prime" function, which according to the manual, should fill the secondary filter and bleed the fuel system after a filter change. However, this function doesn't appear to work when the engine is hot (no "clicking" of the pump can be heard, no fuel out of the filter bleed valve can be seen). After manually filling the secondary filter, a an eventual restart occured, and the genset operated normally. Firmly patting myself on my back, I went back to boating as usual. 45 minutes later, same shutdown, same low-speed error code.
I'm baffled. Seems like an air leak would manifest itself well before 45 minutes, and careful inspection of the fuel system has not revealed a leak. All other operating parameters of the genset appear nominal (oil pressure, coolant temperature, output voltage, frequency, etc.) And yup, there is fuel in the tank!
Any ideas? May be time for the "Kohler professional" to step aboard?
Regards,
Pete
In an attempt to address the problem myself, and assuming the issue was fuel-related, I changed both the primary Racor and the on-engine secondary fuel filter elements. This genset has an electric fuel lift pump. There is a menu-driven "prime" function, which according to the manual, should fill the secondary filter and bleed the fuel system after a filter change. However, this function doesn't appear to work when the engine is hot (no "clicking" of the pump can be heard, no fuel out of the filter bleed valve can be seen). After manually filling the secondary filter, a an eventual restart occured, and the genset operated normally. Firmly patting myself on my back, I went back to boating as usual. 45 minutes later, same shutdown, same low-speed error code.
I'm baffled. Seems like an air leak would manifest itself well before 45 minutes, and careful inspection of the fuel system has not revealed a leak. All other operating parameters of the genset appear nominal (oil pressure, coolant temperature, output voltage, frequency, etc.) And yup, there is fuel in the tank!
Any ideas? May be time for the "Kohler professional" to step aboard?
Regards,
Pete