I have a weedie that says McCulloch on the rewind but the whole thing looks like an Echo to me. Only info on it is a serial # tag on the bottom that says 400035B and then some #s that look like the serial # itself. Can you tell me which kind of bearings are in it? Will it make good power? Has 100 lbs. compression. Spark is good. I tore down an Echo that looked just like it,Echo 100, and it had points. But the engine was shot, no compression and scored. thanks for any info; Jim