Small Engines (Lawn Mowers, etc.): ESP no longer functions, twin cylinder engines, compression stroke


Question
I have a Scott's 22" rear bagging self-propelled front drive mower, Model 229630x8 (8/2001). It has a Tecumseh Easy Start Performance (ESP) magna torque 6.5hp OHV engine, Model OVRM105-120. The mower actually starts and runs ok, but the ESP feature doesn't seem to be functioning any longer.  My wife used to be able to start this mower since the pull was so easy. But now I have to start it for her. I have checked the recoil line and it seems fine. ESP has disappeared.  Is there anything I can check or do to restore the ESP function?

Answer
Hello Bill:

This is Usually a Sign that the Valve Clearance Requires Resetting. The ESP Operates Off the Cam and Uses the Valves to Reduce the Compression During Starting. You can View a Breakdown/IPL of this Engine at this Site Addy, http://www.outdoordistributors.com/ and Select the T. Then Select Tecumseh. Then Select Don't have Part Numbers. Then Enter the Model Numbers (OVRM105). Then Select your Model and Download the File for Online Viewing. The Following is a Basic File I mad for this Procedure. 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). 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 Locks and Set the Intake Valve Clearance to .004in -.006in and the Exhaust to .004in - .006in. 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.** On Some Engines you can Us a Straightened Coat Hanger and Feel the Piston. Be Careful and Dont Jam the Wire in the Cylinder. Usually the Piston will Push the Wire Out of the Spark Plug Hole with No Problems. 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. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 10 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. Thanks.

Respectfully

John