[AT] Super M hard to start

[Cecil Bearden]

I should also note that my arctic cat 700 ATV runs better on the cheap 
stuff tool
Cecil

On 2/5/2020 8:24 PM, Indiana Robinson wrote:
> Hi Dean:
> My Super M and Super MTA both tend to be cold natured at start up and 
> when working hard prone to dieseling at shut down. Both have thin-wall 
> sleeves and oversized pistons. To start up "cold" I typically open the 
> throttle maybe about 5 % or less and use the choke heavily. For the 
> dieseling I keep the idle speed backed off so that the throttle plate 
> shuts completely when I shove the lever all the way forward. I keep a 
> small paint mark on the quadrant back a few notches as an idling 
> setting. They can't diesel if they can't get any fuel. :-)  It has 
> always served me well.
>
>
> .
>
> On Wed, Feb 5, 2020 at 8:29 PM Dean Vinson <dean at vinsonfarm.net 
> <mailto:dean at vinsonfarm.net>> wrote:
>
>     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
>
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>
> -- 
> -- 
>
> Francis Robinson
> aka "farmer"
> Central Indiana USA
> robinson46176 at gmail.com <mailto:robinson46176 at gmail.com>
>
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