[AT] [External] Re: Spark Plug Fouling Ferguson TO20

[Mark Johnson]

I always wondered why our JD 620 had something as (relatively) advanced 
as a 2-barrel carburetor. This explains a lot.

Mark J

On 6/24/2019 10:08 PM, deanvp at att.net wrote:
> I only call my Iowa Snowbird friends in AZ : IOWA= Idiots Out Walking Around
> But if they are nice to me I call them Intellectuals Out Walking Around.  So
> you are safe.  Even with only Two Cylinders JD could not get both cylinders
> to get the same shot of gas. One cylinder was always on the short end of the
> stick.. They solved that by going to a duplex carburetor and picked up 2 HP
> just because both cylinders were now being fed equally. Not all cylinders
> are created equally. But have not heard of any discrimination suits lately.
>
> Dean VP
> Snohomish, WA 98290
>
> -----Original Message-----
> From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Henry Miller
> Sent: Monday, June 24, 2019 7:01 PM
> To: at at lists.antique-tractor.com
> Subject: Re: [AT] [External] Re: Spark Plug Fouling Ferguson TO20
>
> It is really hard to get all cylinders to pull the same amount of fuel /air.
> The intake manifold has different curves, lengths, and sometimes
> restrictions. It adds up to one cylinder running richer than another. The
> richest will foul plugs of course.
>
> Thats my theory anyway. Feel free to call me an idiot as everyone else one
> the internet does.
>
> --
>    Henry Miller
>    hank at millerfarm.com
>
> On Mon, Jun 24, 2019, at 12:53 PM, Greg Hass wrote:
>> Sort of a review of what some have already said, but years ago we had
>> a IH 350 utility tractor. It was our loader tractor but also ran the
>> baler all summer. It got so it would always foul the front plug, what
>> ever number that is, but no other plug would foul. The parts guy said
>> to try a hotter plug; how much hotter I don't remember. So we put a
>> hotter plug in just that cylinder and had the tractor for another 10
>> years and never fouled another plug. Never did figure out why that one
>> cylinder fouled but did not argue with success.
>>          Greg Hass
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