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<DIV>Where is the timing? Stock it should be 0 degrees at cranking speed
and 30 at high idle. With overbore and fire crater pistons the distributor
should be modified to 0 at cranking speed and 20 at high idle. If the 0 is
right, the rest of it probably won’t matter for starting. The 20 vs. 30
could explain the dieseling.</DIV>
<DIV> </DIV>
<DIV>Jim Becker</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=dean@vinsonfarm.net>Dean
Vinson</A> </DIV>
<DIV><B>Sent:</B> Wednesday, February 05, 2020 7:28 PM</DIV>
<DIV><B>To:</B> <A title=at@lists.antique-tractor.com>'Antique Tractor Email
Discussion Group'</A> </DIV>
<DIV><B>Subject:</B> [AT] Super M hard to start</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<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></DIV>
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