Hi Al
Yes the crank and lower rod journal are badly pitted.I an in no rush for parts,i have about 8 projects in boxes.I thought i had everything for a Mc70 when i got bearings and seals for this one.I got enough for 2 saws.Turned out that the Mc70 has a bigger bearing on the PTO side then the Mc101.So i packed it all back up again as i wait for the bearing guy to get me some non Chinese bearings.
Lee H i will see what it measures out.Had a piston from a PM 275 handy it fit nice in the jug,the PM390 piston makes the 101 piston look small.
John it will run again... some day. I did get a 125 engine in Mc20 dressing that could be used,but there has been work done on the 101 block,so it would be a waste to not try using it.