Small Engines (Lawn Mowers, etc.): craftsman lawn tractor - no start, twin cylinder engines, craftsman lawn tractor

Question
I have a 3 year old twin cyl 22 hp briggs & stratton powered mower  It slowly
became harder and harder to start, to the point where I needed to replace the
starter and it still will not start.   Just by accident I found that if I removed the
spark plugs and then re-installed them it would start.  I should mention that
I use this unit to move around our property at usually slower rpm as I am
partially disabled  and noticed over time that the unit seems to have lost some
of its power.  Your assistance would be appreciated. thank you

Answer
Hello Richard:

From your Description, it Sounds like the Valves Require Adjusting. **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 (Both Rocker Arms will have Play in them when the Engine is at TDC) When Setting the Valve Clearance. Now Loosen the Valve Adjuster Locks and Set the Intake Valve Clearance to .004in -.006in and the Exhaust to .007in - .009in. 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.**  Send me the Model and Type or Spec Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. The Model Numbers May be Stamped Into the Blower Housing (metal engine cover) Above the Spark Plug. 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