Engine housing question

I purchased a Craftsman 919.762500 pressure washer. I am going to try to get it running, but there is something I need to identify before I start. Between the pump and the motor there is a small hole in the top of the housing. I have no idea what it is for. Can anyone provide any information? The image is taken looking down.

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Posted 3 years ago by Kathy Overman in Home Repair

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