Hi need some advice on a 10 hp honda my wifes 2 uncles changed the oil in it and each thought the other put oil in while doing other things to make a long story short they put it on the boat and went about 50 yards and motor locked up brought it back home pulled spark plug sprayed oil in cyclinder and left it sit next day tried to pull it over wouldn't budge put a big socket on the flywheel and worked it a little and it broke loose do you guys think it hurt the motor what should we do compression check? or put plug in and cross fingers and see what happens ? It is a 4 stroke engine