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I have a 4kw onan MDK genset. Last fall I had to replace the pan and had no luck finding an onan part. Long story short, I found the KUBOTA pan that ONAN had marinized and installed it. Only difference is I now have to drain the pan through the dipstick. The pan dimensions were the same as I placed them side by side and compared. Fast forward two months. First trip out was in February, a flat calm day. Generator runs great all day. Second trip out (a bit rough) generator runs forty minutes and trips on a fault. Upon returning to the dock, I ran the machine under full load for an hour and could not duplicate the fault. Yesterday, I ran the machine again and it cut out after forty minutes on a fault. Upon resetting the machine and restarting it cut out in approx. three-five minutes. Again it ran over an hour loaded at the dock. Am I correct to assume that this cannot be a hi temp or EGT trip being that the gene restarts immediately upon cutting out? Forgot to mention at dock gauges on machine read 175 deg. and 40psi. Oil level looks fine 10w30. I am planning on changing oil and trying again as pressure is only thing I can see shutting machine down. Anyone else ever had a similar issue where machine only stalls at sea?
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