B&S L head valve clearance adjustment

[Tig]

Adjusting the valve clearance on my riding mower engine finally made it to the top of my list. I believe the clearance is too large causing the starter to labor. To my dismay I found that I have a B&S twin with an L head (420000 series). It seems that valve clearance is not a simple matter on this motor. Does anyone know what my options are?
Can I buy a longer push rod or valve with a longer stem?
Can I shim a push rod seat?
Lapping the valves would probably close the gap a bit, but I think I need much more.
I just want to know what I'm up against before I pull the heads.
Thanks.

 

[Scooby074]

I have a Lhead in my craftsman.

Somewheres i hae the manual. Ill see if i can find it

As to the valves, how much are you out of spec? Are you following the proper procedure for checking gap?

You'll have to lap them to tighten up the lash, if not its new valve time. If i remember theyre around $80 each

Edit: Looks like i deleted the shop manual? but ill post up the spec sheet.

 

[montanaman]

I just want to know what I'm up against before I pull the heads.
Thanks.

I don't do much Briggs work, but you shouldn't need to pull the heads just to check it. Should be a cover that can be removed to check push rod to valve clearance.

If it is too loose, then worry about pulling the heads.