Today's Message Index:
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1. 03:09 PM - use of carb cleaner (canadian.outdoor.sales@gmail.com)
2. 03:10 PM - Auto Response (A. Dennis Savarese)
3. 04:56 PM - Re: use of carb cleaner (Bitterlich, Mark G CIV NAVAIR, WD)
Message 1
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| Subject: | use of carb cleaner |
I have an m14p installed on a Moose and wondering if a non ethanol carb
cleaner can be used on the carb. I have developed a stumble when pulling
power off in the descent. Usually around 18"mp and 2000rpm. The stumble
quits if I continue to decrease power or increase rpm. I am thinking it
is when the carb is transitioning from high to low speed jet. I have
blocked the accelerator jet as per the Kimble mod. No stumble now when
applying power. Any opinions are appreciated.
Best
Mike Mahoney
Message 2
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I am regrettably having computer problems and I am doing everything possible to
get back up and running as quickly as possible. Thank you for your understanding.
If it is urgent, please telephone me at +1 334-546-8182.
Best regards,
Dennis
Message 3
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| Subject: | use of carb cleaner |
Well you asked for an opinion.
I do not agree with the "Kimble Mod" of blocking the accelerator jet. This was
something that was the E Ticket Ride a long time ago before folks realized that
this jet had a way to be ADJUSTED, by using different jets that came in a PACK.
Obtaining the accelerator jet kit allows you to tailor the carb to the engine.
This issue seemed to primarily be with the M-14PF engine and less so the
M-14P. Either way, the jet kit eliminates the problem properly, but if you
are happy with what you have done, so be it.
I would not recommend ANY kind of "carb cleaner". This is not a float fed carb,
with a venturi and jets. This is a pressure carb that is very close to fuel
injection principles. It is.. in my humble opinion, very unlikely that your
carb is at fault here if it has been working fine.. especially pulling the power
BACK.
I would suspect instead some kind of intake leak. For example, if you have the
intake drain kit installed... look that puppy dog over CAREFULLY for any cracks
or leaks. The stumble sounds to me like an engine going lean as you come
out of the supercharger and start to come back to ambient or below. An intake
leak of any type here could cause that. Intake drains, tubes, you name it.
One of the things you can do is to get some WD-40, or ... heaven forbid starter
fluid.... I'm pretty scared of that stuff.... and spray it around the intake
at idle and listen for change in engine sound. An intake leak will suck that
stuff up and you'll hear it in the engine sound. Starter fluid works, but man...
scary stuff. A compression check on all the cylinders is also called for
in case you have a really weak cylinder which also might go lean with throttle
pullback.
I would listen to some of the better engine experts on this list. Dennis, George
Coy, M-14P, etc. I am not a Russian engine super duper mechanic. I have
been around same and have learned from them. I just doubt that this is a carb
issue based on my 14 years or so being around them.
Mark
________________________________
From: owner-m14pengines-list-server@matronics.com [owner-m14pengines-list-server@matronics.com]
on behalf of canadian.outdoor.sales@gmail.com [canadian.outdoor.sales@gmail.com]
Sent: Wednesday, May 28, 2014 6:10 PM
Subject: M14PEngines-List: use of carb cleaner
I have an m14p installed on a Moose and wondering if a non ethanol carb cleaner
can be used on the carb. I have developed a stumble when pulling power off in
the descent. Usually around 18"mp and 2000rpm. The stumble quits if I continue
to decrease power or increase rpm. I am thinking it is when the carb is transitioning
from high to low speed jet. I have blocked the accelerator jet as per
the Kimble mod. No stumble now when applying power. Any opinions are appreciated.
Best
Mike Mahoney
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