Hey Ralph,

I recently gotanother OS 61 SFN engine off the bay (auction site). I completely go through the engines from there just ot be sure they're ok. This particular one had a badly gunked up piston pin.

The reason I bring this up was this also could have been your problem as well. In my case it was justdryed up castor. I had to heat up the engine with my heat gun to get the conrod to move enough to get it off the crankpin. I tried soaking in fuel but was taking to long.

In your case, if that was part of the problem,running the engine maybe loosened it up. On mine it looks like the previous owner left copious amouts of fuel in the crankcase.

Bryan