Jet Pump Not Protected

Open the lid so it can expand. Pull the drain plugs so if it melts a little it will drain.
 
It’s pretty frozen and I didn’t want to put too much pressure. Should I use a hammer to open the lid?
Either use a scrap of 2x4 to cushion the blows or a rubber mallet.

Be careful. If you use too much force you may crack it.
 
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