I looked at the exploded diagram found in the manual and all washers and prop nuts are accounted for (I got a replacement prop nut and prop washer from the flying field, they have a box of extra little parts that people find lying around on the ground).
thing is when I run it at (aproximates here) 1/2 or more throttle it runs and does good, no sign of death. if I throttle it down it will die and the prop will be stuck at the "hard spot" im now assuming is TDC (Top Dead Center piston position). now I wonder if I let it run long enough to get hot ,like leave it on full throttle for 10 min., and then throttle it down to see how far I can get before I kill it. if its just tight when cold it should idle fine when warmed up and should run with a normal attitude. am I right??? Might be the basis for an experiment.