EMGLO oil change

I just got a old used EMGLO model K15A-8P. Engine is K0.
I would like to check the oil level. What I found is a round plug near the oil drain.
My question is: How do I get the plug out?
I have tried twisting clockwise and counter clockwise. but it only moves about 1/8 on a inch.
Tried prying it up, (thinking it might be like a car dipstick) with no luck.
The above was done with medium pressure. Was concerened I might break something.
So which way do I twist or pry?
I am new to this type of online help. If I do not respond to a question or what ever, it is because I do not know what button to push.

 

Does the round plug have two ears on it? If so, just unscrew it completely and it will come right out. Some have dipsticks attached, some use eyesight to detect the level of oil.

 

This guy is a good source for compressor questions.



image credit: mastertoolrepair dot com

You are probably on the right track if you are turning the plug on the base of the motor.

Don't bother checking the oil level, just drain and replace with the correct amount of oil. If the oil is dirty it needs to be changed. If I recall, on my little Emglo, they suggest changing oil once for every 24 hours of operation. (like i've ever done that! LOL) But I should do it more often.

On the schematic, 26/27 is the cap and nipple to drain oil, the oil plug is above and to the right.

 

Looking at both of your answers, If I am reading them correctly, the oil fill hole just unscrews like the lid in a jar.
The reason to ask is it only moves 1/8 of a inch and locks up. It may be that someone crossed threaded it.
just a bit scared to apply too much presure and snap it off. There are no tabs, just a round cap. I am using pliers to try to take it off.
Any thoughts about useing heat (propane torch) to help free it up!