The vent hose appeared to be free and in good shape, other than being coated with mud and grease.
I did some checking online and found that while compression should be in the range you mentioned, it would be impossible to get a good reading with a 4 stroke.
I do have a leakdown tester in the toolbox as well though, so it might be a better indication of what's going on. Still need that pesky little adapter though... hahaha
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