Sudden vibration?
Shut down immediately!
Shut down immediately if the unit starts to shake or vibrate.
A sudden vibration is a sign there may be dangerous trouble, such as a broken flywheel, clutch or cutting attachment, or loose parts.
Do not use the unit until the problem has been properly diagnosed and corrected.
Keep feet and hands away until rotation stops.
When the unit is turned off, make sure the cutting attachment stops before the unit is set down.
A cutting attachment can injure while it continues to spin after the engine is shut off or throttle control is released.
If the cutting attachment rotates after throttle is returned to idle, carburettor adjustment is required. Follow instruction on this manual to make the adjustment yourself, or have the carburettor adjusted by your ECHO dealer.
All maintenance and adjustments given in this manual should be performed by you or your ECHO servicing dealer on a timely basis.
All required service or repair must be done only by ECHO servicing dealer. Never attempt to use an incomplete or one fitted with unauthorized modification.
Do not operate
Always use both hands on the handles. Do not operate
Always hold the unit with the fingers and thumbs encircling the handles.
Pull out 
Shaft tube
WARNING 
DANGER
IN CASE OF AN EMERGENCY, USE QUICK- RELEASE PIN ON HARNESS TO FREE YOURSELF FROM UNIT.
7SRM-2305