Small Engines (Lawn Mowers, etc.): lawn mower trouble shooting, air mixture, air filter oil

Question
i have a scotts tecumseh 6.5 ohv i have replaced the spark plug air filter oil problem is sevral things when i push the prime button it dose nothing won,t start it,s hard to pull when i put gas dirtly in carb it will start for a secondor two but the pull cord rips out of my hand won,t stay going please help
thanks steve  

Answer
 Hello Steve:

 Has the Mower Hit Anything Lately? Make Sure the Blade is Tight. If the Blade is Tight, then it Sounds Like the Flywheel Key is Damaged. The Kick Back is Usually a Sign of a Loose Blade or a Damaged Flywheel Key. The Flywheel has to be Removed to Check this Key. If the Key is Good, then Remove, Disassemble and Soak the Carburetor Overnight in Carburetor Cleaning Solution(I use Gunk) and then Blow Out the Passages with Compressed Air. Install New Kit. In Case you Carburetor has Air Mixture Screws; I am Including the Instructions for Setting them. **The High Air Mixture Screw is In the Carburetor Bowl in the Center of the Nut or Some Carburetors have Both the Low and High Side by Side on the Top Side of the Carburetor. The Screw Closest to the Engine Is Usually the High Air Mixture Screw on this Type Carburetor.The Low Air Mixture is the One at Top on the Side and Goes Into the Carburetor.   Some have the Idle Air Mixture Screw Going Vertically Into the Top of the Carburetor. The Idle Screw is the One that Moves the Throttle Plate. The Following is the Directions for Setting these Screws. **If the Carburetor was Soaked Overnight in Carburetor Cleaning Solution and the Passages Blown Out with Compressed Air and a New Kit Installed,  then we can Set the Air Mixture Screws. Turn Both Air Mixture Screws In Until Seated. **DO NOT JAM  SNUG ONLY** Turn Both Screws Out 1 1/2 Turns. Set the Throttle to Full Open and Start the Engine. Override the Throttle by Pushing the Governor Arm by Hand and Turn the High Air Mixture Screw(bottom of the bowl) In Until the Engine is Revving Properly. Now Slow Engine to Idle. Set the Low Air Mixture Screw so there is No Hesitation when Throttling from Idle to Full Throttle. Now Set the Idle if Required.** Check the Valve Tappet Clearance, also. Hope this Helps. I am here if you Require more Assistance. Let me know what Happens, Please. Thanks.

 Good Luck

 Respectfully

 John