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Need to replace the reed valve on my Lawn Boy L21 with the F engine. Looks like usual R & R except that the valve is part of the crankcase itself. Any hints or things to look out for when taking off the case half section? How is the case sealed at the split? Can't find much info on this. Thanks.

It’s pretty straight forward. Clean mating surfaces good and use something like Permatex Anaerobic sealant (red) to seal the two halves. Just follow the on-manual and should be no problems. Below is the link for tear down/rebuild of the F series.

https://lookup3.toro.com/ttcGateway/Acrobat/manuals/lball37.pdf

Thanks for the info, and thanks a million for the download. Looks pretty straightforward, thankfully.

This is the correct stuff Lawnboy77 is referring to:

I've used this same stuff to seal Honda GCV crankcases.

Thanks for the pic and clarification on the sealant Russ, for some reason I had Permatex in mind, but the Loctite product in the pic is the same stuff I have always used.