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Possibly of some interest: I had a Craftsman walk-behind that quit
running suddenly. I tore the engine down, didn't find anything, then
finally took it to a repair shop. They told me the blade had a crack in
it that caused the problem; supposedly the blade is part of a timing
loop that fires the spark. Sort of makes sense if you think of the blade
as a flywheel with a position sensor on it.
Bob
On 5/18/2021 2:55 PM, Brian and Wendy Warrick wrote:
> I run Snapper walk behind mowers and have never gave it a thought. I
> can't see why it would matter. If it did, they would have designed the
> adapter differently.
>
> Brian
> Nampa, ID
>
> ------------------------------------------------------------------------
> *From:* Shop-talk <shop-talk-bounces@autox.team.net> on behalf of Karl
> Vacek <stearman809@gmail.com>
> *Sent:* Tuesday, May 18, 2021 3:52 PM
> *To:* 'shop-talk@autox.team.net' <Shop-talk@autox.team.net>
> *Subject:* [Shop-talk] Mower blade orientaaion relative to piston
>
> 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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Possibly of some interest: I had a Craftsman walk-behind that quit
running suddenly. I tore the engine down, didn't find anything, then
finally took it to a repair shop. They told me the blade had a crack
in it that caused the problem; supposedly the blade is part of a
timing loop that fires the spark. Sort of makes sense if you think
of the blade as a flywheel with a position sensor on it.<br>
<br>
Bob<br>
<br>
<div class="moz-cite-prefix">On 5/18/2021 2:55 PM, Brian and Wendy
Warrick wrote:<br>
</div>
<blockquote type="cite"
cite="mid:MW2PR07MB397889AB84D2574BA8B851DCBB2C9@MW2PR07MB3978.namprd07.prod.outlook.com">
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<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
I run Snapper walk behind mowers and have never gave it a
thought. I can't see why it would matter. If it did, they would
have designed the adapter differently.</div>
<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
Brian</div>
<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
Nampa, ID</div>
<div>
<div style="font-family:Calibri,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Shop-talk <a class="moz-txt-link-rfc2396E"
href="mailto:shop-talk-bounces@autox.team.net";><shop-talk-bounces@autox.team.net></a>
on behalf
of Karl Vacek <a class="moz-txt-link-rfc2396E"
href="mailto:stearman809@gmail.com";><stearman809@gmail.com></a><br>
<b>Sent:</b> Tuesday, May 18, 2021 3:52 PM<br>
<b>To:</b> '<a class="moz-txt-link-abbreviated"
href="mailto:shop-talk@autox.team.net";>shop-talk@autox.team.net</a>'
<a class="moz-txt-link-rfc2396E"
href="mailto:Shop-talk@autox.team.net";><Shop-talk@autox.team.net></a><br>
<b>Subject:</b> [Shop-talk] Mower blade orientaaion relative
to piston</font>
<div> </div>
</div>
<div lang="EN-US">
<div class="x_WordSection1">
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
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..</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
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.</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
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.</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
Power stroke shouldn?t matter, but maybe some dynamic
issue one way or the other?</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
</p>
<p class="x_MsoNormal" style="margin: 0in 0in 0.0001pt;
font-size: 11pt; font-family: Calibri, sans-serif;">
Thanks!<br>
Karl</p>
</div>
</div>
</div>
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