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JohnF2015, Small Engine Technician
Category: Small Engine
Satisfied Customers: 1102
Experience:  Owner/Service Technician at S & J Small Engines
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2011 craftsman riding mower YT 3000 how do I adjust valves

Customer Question

2011 craftsman riding mower YT 3000 how do I adjust valves
Submitted: 1 year ago.
Category: Small Engine
Expert:  JohnF2015 replied 1 year ago.

Hi, my name is***** will be assisting you.

Which engine do you have on this machine?

Customer: replied 1 year ago.
Yt 3000 craftman riding lawn mower 21 hp briggs and stranton
Expert:  JohnF2015 replied 1 year ago.

You will want to remove the valve cover(s) to access the rocker arms and adjustment nuts. Once you have access to the adjustment nuts, there is a set screw in the center of the nut that will have to be loosened in order to make the adjustment, this screw normally has a torx head.

You will want to set all valves at .004 inches with the engine cold. Be sure that you tighten the set screw back down once the adjustment has been made.

Customer: replied 1 year ago.
Does the piston have to be top dead center with air blowing out of plug?
Do both valves set at this same position?
Do the nut or torex screw have a torque setting?
Expert:  JohnF2015 replied 1 year ago.

Normally I like to set the valves by turning the engine until one valve it fully open set the opposite valve, then turn the engine until the valve that you just set is fully open and set the other one. This takes any and all chances or mistakes out of the equation. Otherwise you have to be concerned about the compression release and finding tdc.

No there are no torque specs for either of those.