[grwngmnd]

hey all, can anyone tell me the proper procedure for adjusting the rockers on my used Techumseh 12HP OVH valve vertical shaft engine in my lawn tractor, or where I could find the info, thanks.

 

[davidg]

i cant help, but :Welcome1:

 

[WNYTractorTinkerer]

The newer motors aren't adjustable.. The only way is to grind down the bottom of the valves to gain adequate clearance.. :goodl:

 

[Glenn M]

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.

 

[Bill Kapaun]

Service Manual

http://www.cpdonline.com/695244a.pdf