Yogi02,
I assume that when you try to start the machine the rope pulls out of your hand and that happens when the blade plate is loose.
When you put the blade plate back on did you read the wrighting on the washer. It has nut side stamped on one side and that stamp should face the nut when you put the blade plate back on.
We have a manual under parts list and manuals area in this forum that shows how to put it back together. It has pictures on the procedure as it can be a bit hard to explain.
If you have a rattle noise when you start the motor then I would say that the decompresser valve is broken and you will need to replace it (cost about $25.00).
Let us know how you get on with the repair.