Tiger,
Note that if you do not have the washer on the correct way (Nut side stamped on washer) it will not lock the blade plate in position (if put on incorrectly) even if you think it is tight it will not hold.
The blade plate is like a flywheel which balances the engine so if it is loose it throws the timing out.
If you take your time and think about what you are doing you will get the job done twice as quick than if you try to race it. If you are not sure then please ask (for your own safety) here because the moderators, who are a great bunch of guys are waiting to help every member if they can.
