[AT] Super M hard to start

[Ron Cook]

A closed throttle is essentially a choke.  We are not talking an 
injected engine here.

Ron

On 2/8/2020 12:37 PM, Dean Vinson wrote:
>
> 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.  :)
>
> I didn’t start the tractor this morning but it looked nice with a 
> little snow on it.
>
> Dean Vinson
>
> Saint Paris, Ohio
>
> *From:* AT [mailto:at-bounces at lists.antique-tractor.com] *On Behalf Of 
> *Dean Vinson
> *Sent:* Wednesday, February 5, 2020 8:29 PM
> *To:* 'Antique Tractor Email Discussion Group' 
> <at at lists.antique-tractor.com>
> *Subject:* [AT] Super M hard to start
>
> 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.
>
> 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).
>
> 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.
>
> 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.
>
> Dean Vinson
>
> Saint Paris, Ohio
>
>
> _______________________________________________
> AT mailing list
> AT at lists.antique-tractor.com
> http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.antique-tractor.com/pipermail/at-antique-tractor.com/attachments/20200208/145e171c/attachment.htm>