On Jul 5, 9:24*pm, wrote:
On Tue, 5 Jul 2011 10:42:19 -0700 (PDT), jamesgangnc





wrote:
On Jul 5, 11:58*am, dpb wrote:
On 7/5/2011 10:47 AM, Bob F wrote: jamesgangnc wrote:

...

Almost always fuel issues. *Sometimes gas evaporates from the carb
while it sits for long periods and deposits form. *Remove,
disassemble, and clean the carb. *Make sure the jets are clean. *If
you see deposits then use a small piece of wire to clean out the main
jet. *If it's just 2 years old and you are careful you probably will
be able to reuse the gaskets.

One way to help prevent deposits from forming is ti shut the gas off
and let the engine run until it dies. *You don't need to do that
during the summer but you should at the end of the year if it's going
to sit for the winter.

...

I keep hearing this but in 50+ something years I've seen the feared gas
deposits in the small engine carb exactly -- well, let me count: *yes,
zero times. *Sediment in fuel from contamination, yes; the fuel itself I
just don't see it and never do more than close the cutoff in winter
storage. *Come spring, a spritz of fresh in the carb itself for starting
and away she goes; fresh in the tank to top it off will mix in and by
time need a refill you're all brand new again for another year.

I don't buy it...if it's a fuel issue it could be but I'll bet it's more
of a contamination than otherwise caused. *Older leaded gas was somewhat
worse because the lead would gum out but unleaded "not so much"...

$0.02, imo, ymmv, etc., etc., etc., ...

--

I've fixed multiple carbs that had deposits inside the jets. *Causes a
lean condition and make them run rough or surge. *Is it just the fuel,
or is it the fuel plus contaminants, could be. *But with lawn
equipment the likelyhood of contaminants in the gas is pretty high.
In gravity fed carbs vented to the atmosphere evaporation will just
continue all year. *Turning off the gas stops that. *Running the gas
down is even better. *It's not a problem with the little diaphram
carbs. *They don't have a float bowl.

*But it is STILL a problem - because it's not JUST evaporation that
causes the problem- Hide quoted text -

- Show quoted text -

I agree, water and ethanol is another problem. It settles out when
the amount of water absorbed by the ethanol reaches a certain
saturation. Worse with small engines because they sit longer and
their fuel systems are more exposed to the atmosphere. I use premium
and add stabilizer all year. I'm never sure when I'm going to stop
using gas equipment. I run the bowl dry on my generator because it
sits longer than anything else.