[AT] Cub problem

[Bo Hinch]

Several years ago a distance friend was having trouble with a ford 2000
that was a real problem as it started in early winter and while putting out
hay would always act up about the time he had to drive thur a bad spot and
some times would bog down as the tractor would run so bad . He had the
carburetor rebuilt and it seamed to help ( for a little while) , and then
got worse again . He bought a NEW carburetor , installed it and still had
the same problem . I went and checked it early one cold ( 38*) morning and
first thing I checked was the POINTS . The platinum had become unsoldered
and was just floating around and not making good contact . Replace both
points and condenser which solved his problems . A lot of money was spent
for nothing because of misdiagnosis . Live and Learn .

On Fri, May 13, 2016 at 6:38 AM, Cecil Bearden <crbearden at copper.net> wrote:

> If you ran the cheap unleaded gas in it, then I would bet there are some
> white flakes of dried surfactant in the carburetor.  If the gas had any
> ethanol ( as all of it has some, even the no ethanol ) then there is a
> flake of rust in it.    I run only the highest grade of ethanol free
> gasoline in all of my older engines that were built prior to unleaded
> gas.   I think I have told the story before of having to use the high
> grade of gas on my fire pumps to get them to meet the test
> requirements.  I have lost a lot of small engine carburetors to ethanol
> in the gas even  the no ethanol grade.  A little Marvel Mystery Oil
> seems to help keep the ethanol from attaching the carburetor when it
> dries out.    Unleaded low octane gas has a surfactant in it to make it
> burn at a lower temperature for less emissions.  It seems counter
> productive, but that's the EPA... The engine needs heat to operate
> efficiently and the gas has water added to lower the heat content.   I
> was told by a petroleum engineer that the white powder/flakes in the
> carburetor left  when the gas evaporates is the surfactant  to make the
> water mix... Ethanol just causes more water to be pulled from the air...
>
> I once had an Onan Generator with a 30 gal tank.  I had to run Methanol
> in the gas to keep the carb from icing when running in the middle of the
> night.  This was during the 2001 Ice Storm.   We ran for 27 days on
> Generator.   I bought a diesel generator and sold the Onan.  The buyer
> brought the generator back as it only ran one tank of gas through it
> and then would not start.   Rust from had built up in the bottom of the
> tank and blocked the fuel inlet.   The rust was very finely powdered.
> The gas tank was completely dry from the methanol.  I connected a 1/2
> inch pipe to my shop vacuum and sucked every bit of rust out of the
> tank.  I then put a 1 inch long tubing in the fuel bowl inlet to stick
> up in the tank and prevent water and sediment  from plugging up the fuel
> line...
>
> Just my $0.02
>
> Cecil in OKla
>
>
> On 5/12/2016 10:14 PM, Mike M wrote:
> >
> > On 5/12/2016 2:15 PM, Greg Hass wrote:
> >> Am having trouble with my 1949 Farmall Cub. It sat from fall until about
> >> April when I started it.
> >>
> > IT SAT.  If it had fuel in the carb, my money would bet on a fuel system
> > issue. These carbs are so easy to pull apart, why not pull it and give
> > it a good cleaning and blow out? Stop trying to find the the zebra in
> > the room when the 900 lb gorilla is staring you in the face. Make sure
> > all the orifices and jets are squeaky clean. Then check for crap
> > floating around your fuel tank that could clog the screen if so equipped.
> >
> > Mike M
> >>
> >
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