[Shop-talk] Mower blade orientaaion relative to piston

[Pat Horne]

Can’t say for sure but I would expect the engine to be balanced without blade installed so it “shouldn’t” make a difference. 

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On May 18, 2021, at 4:53 PM, Karl Vacek <stearman809 at gmail.com> wrote:


Last time I sharpened my 21” walk-behind mower blade I thought of something that’s never occurred to me, after using the same brand of mower for 25 years..
 
On a Snapper, the blade can actually go on any way onto the square adapter keyed to the crankshaft.  The mounting point is square, no pins, no longer side, nothing.
 
One way would be aligned with the cylinder at TDC/BDC, and the other way would be across.  It’s been off many times and there’s no way to tell how it was mounted originally.  The manual is silent on this.
 
Power stroke shouldn’t matter, but maybe some dynamic issue one way or the other?
 
Thanks!
Karl
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