I have a 1976 15hp Johnson and am wondering what is involved in replacing the Upper crankshaft bearing. I was replacing the upper crank seal as it was gone. I noticed the main bearing has worked its way up, it is not seated all the way down and pushed the seal onto the cam and wore the seal out, or appears like it has. I was wondering if these are pressed in and what it would take to replace it. It looks worn and I am afraid of flywheel wobble. Can you press a new bearing in, or does the block have to come apart. From appearances it looks like a new one can be pressed in. I was hoping for advice. The part number is 0386008 NEEDLE BEARING ASSY