Small Engines (Lawn Mowers, etc.): Engine Dies, twin cylinder engines, compression stroke

Question
Honda 9 Hp GX270. Stars and runs fine. After a few minutes, engine dies. Will not restart right away. After a few minutes she statts up and dies again. On and On. Replaced spark plug, ignition module, "NEW" carb., checked gas cap, cleaned fuel tank and all screens, check exhaust for blockage. Engine continues to stall once warmed up. Can you help?

Answer
Hello Rick:

>>Since this is a Honda, you can Use this Site Addy; http://www.honda-engines-eu.com/en/welcome.html and Select Service Information from the Drop Down Menu of the Service Tab. Then Select Troubleshooting, Owner Manual or Shop Manual (whichever you are Looking for). You want to View the Shop Manual.
>>From your Description it Sounds like the Valve Clearances May Require Setting.
>>The Following is a Basic File I made for Setting the Valve Clearances. Any Input is Appreciated.
>>**I Do Not Use the Setting Called for by the OEMs. I have Found that the Following Works Best.
>>Remove the Valve Cover (on the Dead Cylinder for Twin Cylinder Engines).
>>Check the Push Tubes and make Sure they are Not Bent.
>>Set the Cylinder you are Setting the Valves on to Top Dead Center on the Compression Stroke When Setting the Valve Clearance. Now Loosen the Valve Adjuster Lock and  Using a Blade Style Feeler Gauge, Set the Intake Valve Clearance to (per your model) and the Exhaust to (per your model). Loosen and Tighten the Rocker Arm and the Feeler Gauge is Placed Between the Rocker Arm and the Valve Top where the Rocker Arm Pushes on the Valve.
>>***BE SURE TO TIGHTEN THE ADJUSTER LOCK AFTER YOU HAVE THE PROPER VALVE CLEARANCE***
>>I have had Better Performance Out of the Mowers and Less Burnt Valves Using these Settings. Be Sure the Piston is at TDC on the Compression Stroke.**
>>If you Remove the Valve Cover and then Turn the Engine by Hand, you can Watch the Intake Valve Movement. When the Intake Valve Closes, the Piston will Just Starting the Compression/Power Stroke.
>>On Some Engines you can Us a Straightened Coat Hanger and Feel the Piston.
>>Be Careful and Don't Jam the Wire in the Cylinder. Usually the Piston will Push the Wire Out of the Spark Plug Hole with No Problems.
>>You can Locate the Valve Specifications at this Site Addy; http://outdoorpowerinfo.com/engine_specs/ .
>>If you Hit a Snag or this Does Not Correct the Problem,  I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Happy. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 5 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John