Compression results

[Joker2]

Did comp. test this morning with a brand new screw in type tester. Had to do it with the engine cold, I can't start it. I got 120 lbs. on all three starboard side cyl. Had 100 lbs. on all three port side cyl. Also this is the 3rd time I found black buildup on the lower starboard side plug. I just changed the plugs last week, only ran motor about 2 hours since. I will try seperate fuel, I think those numbers were like that since I got boat, I feel yesterday was fuel related, just wanted to check comp. Is there a problem with these comp. numbers ?