On Mon, 5 Jul 2010 09:47:37 -0400, Stormin Mormon wrote:
Shear key between flywheel and shaft.

It's a Briggs & Stratten 6.5 HP 21" cut Craftsman part number 917.388853
push mower. I found the manual he
http://www.managemylife.com/mmh/lis_...M/L0505023.pdf
http://www.hammerwall.com/Download_Manual/14875/
http://tinyurl.com/32mzm2n

From the owners manual, the engine of the Craftsman 917.388853 6.5HP 21"
push mower is a Briggs & Stratton, Model-Type-Trim of 123KO2-0444-E1.
Model = 123KO2
Type = 0444
Trim = E1

Looking at the web site for that Briggs & Stratton Model Number
123KO2-0444-E1 engine, I can't find the owners manual for the engine
itself.
http://www.briggsandstratton.com/mai...123KO2-0444-E1

I think I'll call Briggs & Stratton in the morning to find out WHY that
Model/Type/Trim combination isn't shown on their web site.