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Message: <blockquote data-quote="Pappy" data-source="post: 475794" data-attributes="member: 3278">Since that engine was apparently run on a 24:1 mixture I would doubt the bearings are worn. The way you are "testing" it is not a valid way. As Shaugh mentioned. Keep oiling it down and turning it. Put the head back on and check compression. Those old engines are pretty bullet proof. Let's go this route first before assuming you have failing parts internally.Perhaps a better way to check a rod bearing or piston pin would be to turn the rotating assembly so that a piston is on the down stroke. Stop and lock the assembly in place. Place the wooden handle of a hammer against the piston and push straight down. There should be next to no movement. Compare the two assemblies. </blockquote>