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<p>A closed throttle is essentially a choke. We are not talking an
injected engine here.</p>
<p>Ron<br>
</p>
<div class="moz-cite-prefix">On 2/8/2020 12:37 PM, Dean Vinson
wrote:<br>
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<p class="MsoNormal"><span style="color:#1F497D">Thanks,
everyone. I don’t know about the timing, will have to look
into it. Gasoline in the tractor is pretty fresh… it gets
used at least weekly. Freeze plugs appear to be good. :)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I didn’t start
the tractor this morning but it looked nice with a little
snow on it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Dean Vinson<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Saint Paris,
Ohio<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> AT
[<a class="moz-txt-link-freetext" href="mailto:at-bounces@lists.antique-tractor.com">mailto:at-bounces@lists.antique-tractor.com</a>] <b>On
Behalf Of </b>Dean Vinson<br>
<b>Sent:</b> Wednesday, February 5, 2020 8:29 PM<br>
<b>To:</b> 'Antique Tractor Email Discussion Group'
<a class="moz-txt-link-rfc2396E" href="mailto:at@lists.antique-tractor.com"><at@lists.antique-tractor.com></a><br>
<b>Subject:</b> [AT] Super M hard to start<o:p></o:p></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My Super M is hard to start in cold
weather. It always does start, eventually, but if the
weather is cold it’ll take maybe five or six or eight
attempts, with each one resulting in a few pops or a second or
two of running before it dies. I always think I just need to
find the right amount of choke vs throttle, but I don’t know
whether I’m really finding it or whether the engine just gets
warmed up enough by the repeated attempts that finally it
settles down and is just plain ready to start. In warm
weather it typically fires right up with no hesitation.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">12 volt battery is well charged, and a few
years ago I had the starter rewound for 12 volts, so there’s
no shortage of cranking power and it turns the engine over
nice and fast (but not crazy fast like it used to with the 12V
battery on the original 6-volt starter). <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It does have pretty high compression,
resulting I assume from a rebuild shortly before I bought the
tractor ten years or so ago, and which helps it put out about
55 hp on the dyno. I can’t remember the compression numbers
right now, but I remember checking compression after buying
the tractor and thinking “Wow, those are some high numbers,
and all four cylinders are just about dead-on equal.” When
hot the engine typically diesels at shut-down unless I let it
sit and idle for several minutes, so I’m wondering if the hard
cold starting is related. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anybody have similar experiences or
recommendations? The other thing I was wondering is if maybe
the non sequitur is out of adjustment, but I can’t find the
factory specs for it in the service manual.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dean Vinson<o:p></o:p></p>
<p class="MsoNormal">Saint Paris, Ohio<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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