Small Engines (Lawn Mowers, etc.): valve settings, twin cylinder engines, compression stroke

Question
I have a 17 hp ohv briggs engine and i need to know the setting for the valves. Model 310707 type 0137 E1 code 020416ZA. A freind tried to set them. What the mower was doing when trying to starting the engine it would drag down on the compression stroke he said the valves needed setting it does the same thing now. We change the starter didn't help I am lost on what to do

Answer
Hello David:

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 .008in - .010in. I have had Better Performance Out of the Mowers and Less Burnt Valves Using these Settings. If the Valve Setting are Correct and the Starter Still Turns the Engine as you Described, then Check the Battery for a Weak/Dead Cell. Check the Flywheel Key for Damage. You can View a Breakdown/IPL of this Engine at this Site Addy, http://www.smallenginepartswarehouse.com/parts.asp and Select the Shop Online Parts Look Up. Then Select the Model Tab. Then Select the OEM and Enter the Model and Type Numbers. Then Double Click on the Model in the Results Area. Now you can Select the Section of the Engine you Wish to View. Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. 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 9pm EST (US). My New Day Starts then. Thanks.

Respectfully

John