[Shop-talk] Mower blade orientaaion relative to piston

[Thomas Coradeschi]

As others have noted, I can’t imagine any reason why it would make a difference. Multiple blade mowers require you to pay attention to that, for obvious reasons. My old Troy Bilt had keyed hubs and a cogged belt driving them, so that was easy (as long as you didn’t dork up replacing the cogged belt). My current Exmark requires you to actually think about the blade orientations when you install them:-)

—
Tom Coradeschi
tjcora at icloud.com


> On 18 May 2021, at 5:52 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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