I'm new to this machine and to excavators. The unit has been running fine until about a week ago. It suddenly idles down while working. I have to shut it down and restart to get the engine speed backup. Any ideas? In checking things I saw that there was too much oil in the crankcase. Probably caused by me when I last changed the oil. Could that cause the engine speed problem? A safety- to prevent some sort of damage? Thanks in advance for any help anyone can provide. Jackson
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