Four-stroke engine. No power, no engine? / Valve Clearance Adjustment Method (Advanced Technology) 

Four-stroke engine. No power, no engine? / Valve Clearance Adjustment Method (Advanced Technology)
Don't you use the 4-cycle lawn mower a lot?
One day, it's been weak, it's not starting well. It's a little emotional.
Engine valve may be a problem.
We are informing you in detail how to repair the valve. ^^