How do I adjust valves on thiss engine? I have a fuel and oil mixture going into the carb,

Thanks

Hi,
Be a bit better if you said how many cylinders, but here are they both;
Lawn Mower Repair Valve Adjustment - YouTube (http://www.youtube.com/watch?v=NjzX-PUjKmo)
Lawn Mower Repair Valve Adjustment - YouTube (http://www.youtube.com/watch?v=NjzX-PUjKmo)
Be that as it may!
Peace,
Clarke