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Problem with Toro mower Art Todesco 06-16-2006
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Posted by Art Todesco on June 16, 2006, 8:30 pm
I have an old Tora (Tecomsa engine)
mower. About 10 years ago I had
problems with the electrical system
(points, etc.) so I replace it with the
"electronic" unit .... no points, all
self contained. After that it never
started like before. What I mean is,
before it would be running before 1/2 of
the pull cord was pulled out. After the
electronic modification, it starts on
the 1st pull, however, but now, at the
end of the pull cord. I also started
more slowly and then ramped up, with
each pop getting closer together until
it was at full speed. It work ok for
all these years, however, it started
acting up when a "helper" put gas in it
from the 2 cycle can (oil). It now
doesn't want to start. I cleaned out
the gas tank, replaced the gas and
cleaned the carb with spray carb cleaner
. When this problem 1st started
happening (after the oil/gas mixture),
it would pop a few times and then try to
turn, sometimes backwards! I assumed
this was something with bad timing.
The spark was also very weak so I again
replace the electronic magneto thing
again ... still doesn't start. Now it
doesn't even pop once. I also tried
starting fluid to no avail Any ideas?

Posted by Jim McLaughlin on June 17, 2006, 1:10 am
The 2 cycle oil / gas ful mixture would have badly badly fuled your spark
plug.

You haven't mentioned the plug. Replace it.


When you pull the old plug, spray a lot of carb cleaner or ether / starting
flid in the cylinder before installing h new plug. Cleans th oil crud off
the piston head and cylinder walls.


--
Jim McLaughlin

Reply address is deliberately munged.
If you really need to reply directly, try:
jimdotmclaughlinatcomcastdotcom

And you know it is a dotnet not a dotcom
address.
> I have an old Tora (Tecomsa engine)
> mower. About 10 years ago I had
> problems with the electrical system
> (points, etc.) so I replace it with the
> "electronic" unit .... no points, all
> self contained. After that it never
> started like before. What I mean is,
> before it would be running before 1/2 of
> the pull cord was pulled out. After the
> electronic modification, it starts on
> the 1st pull, however, but now, at the
> end of the pull cord. I also started
> more slowly and then ramped up, with
> each pop getting closer together until
> it was at full speed. It work ok for
> all these years, however, it started
> acting up when a "helper" put gas in it
> from the 2 cycle can (oil). It now
> doesn't want to start. I cleaned out
> the gas tank, replaced the gas and
> cleaned the carb with spray carb cleaner
> . When this problem 1st started
> happening (after the oil/gas mixture),
> it would pop a few times and then try to
> turn, sometimes backwards! I assumed
> this was something with bad timing.
> The spark was also very weak so I again
> replace the electronic magneto thing
> again ... still doesn't start. Now it
> doesn't even pop once. I also tried
> starting fluid to no avail Any ideas?



Posted by Art Todesco on June 17, 2006, 10:23 am
Thanks Jim,
I did change the plug, however, I think
the new plug is defective. Why?
When I tested it with a ground wire
attached, it didn't spark, however,
the old one did! But I will check it
out, when I get back from a short
vacation.

I should have been a mechanical engineer
rather than electrical!

Jim McLaughlin wrote:
> The 2 cycle oil / gas ful mixture would have badly badly fuled your spark
> plug.
>
> You haven't mentioned the plug. Replace it.
>
>
> When you pull the old plug, spray a lot of carb cleaner or ether / starting
> flid in the cylinder before installing h new plug. Cleans th oil crud off
> the piston head and cylinder walls.
>
>

Posted by Jim McLaughlin on June 17, 2006, 4:54 pm
First, have fun on your vacation.

Second, the symptoms you are describing sure do seem like a spark /
ignition problem
Two other items to check are:

(a). the plug wire end where it grips onto the top of the plug electrode.
Make sure thats tight.

(b). plug wires can break internally, and have only intermittent contact,
passing juice to the plug only at random. While you haveth flywheel off
again to look at the electronic module, use a continuity checker / multi
meter to make sure that the plug wire hasn't died the death of a billon
vibrations.

You being a double E, you know what a pain intermittent continuity problems
can be.
--
Jim McLaughlin

Reply address is deliberately munged.
If you really need to reply directly, try:
jimdotmclaughlinatcomcastdotcom

And you know it is a dotnet not a dotcom
address.
> Thanks Jim,
> I did change the plug, however, I think
> the new plug is defective. Why?
> When I tested it with a ground wire
> attached, it didn't spark, however,
> the old one did! But I will check it
> out, when I get back from a short
> vacation.
>
> I should have been a mechanical engineer
> rather than electrical!
>
> Jim McLaughlin wrote:
> > The 2 cycle oil / gas ful mixture would have badly badly fuled your
spark
> > plug.
> >
> > You haven't mentioned the plug. Replace it.
> >
> >
> > When you pull the old plug, spray a lot of carb cleaner or ether /
starting
> > flid in the cylinder before installing h new plug. Cleans th oil crud
off
> > the piston head and cylinder walls.
> >
> >



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