Today's Message Index:
----------------------
1. 06:54 AM - Re: No Title (keithmckinley)
2. 07:28 AM - Accelerator jet modification (Steven Johnson)
3. 07:37 AM - Re: Accelerator jet modification (Eric Wobschall)
4. 07:50 AM - Re: Accelerator jet modification (Steven Johnson)
5. 07:55 AM - Re: Accelerator jet modification (Eric Wobschall)
6. 07:55 AM - Re: Accelerator jet modification (Eric Wobschall)
7. 08:01 AM - Re: Accelerator jet modification (Steven Johnson)
8. 08:11 AM - Re: Accelerator jet modification (Eric Wobschall)
9. 09:59 AM - Re: Accelerator jet modification (Andy Hawes)
10. 10:22 AM - Re: Accelerator jet modification (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
11. 10:28 AM - Re: Accelerator jet modification (Richard Goode)
12. 01:44 PM - Re: Accelerator jet modification (cjpilot710@aol.com)
13. 07:42 PM - Re: Accelerator jet modification (Roger Kemp M.D.)
Message 1
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Waste of my time. Please don't post that junk here.
--------
Keith McKinley
700HS
KFIT
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=311219#311219
Message 2
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| Subject: | Accelerator jet modification |
I recently had Dennis Savarese swap the two accelerator jets on the
carburetor of my M14P. This totally eliminated all hesitation when adding
power on final. It is an easy modification that takes about an hour. The
carb is a little difficult to reach but the time spent is well worth it. He
merely switched the two jets with each other, no new parts needed. Thanks
Dennis.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
Message 3
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| Subject: | Re: Accelerator jet modification |
Steve:
Have you noticed any difference in CHT?
-Eric
On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
> I recently had Dennis Savarese swap the two accelerator jets on the
> carburetor of my M14P. This totally eliminated all hesitation when
> adding power on final. It is an easy modification that takes about
> an hour. The carb is a little difficult to reach but the time spent
> is well worth it. He merely switched the two jets with each other,
> no new parts needed. Thanks Dennis.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
>
Message 4
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| Subject: | Accelerator jet modification |
I did not observe any change in CHT. My engine is running better than
before, although Dennis also found a couple of loose intake gland nuts and
tightened them at the same time he switched the jets in the carb. It is
really nice to push the throttle forward and feel an immediate surge in
power.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:32 AM
Subject: Re: Yak-List: Accelerator jet modification
Steve:
Have you noticed any difference in CHT?
-Eric
On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
I recently had Dennis Savarese swap the two accelerator jets on the
carburetor of my M14P. This totally eliminated all hesitation when adding
power on final. It is an easy modification that takes about an hour. The
carb is a little difficult to reach but the time spent is well worth it. He
merely switched the two jets with each other, no new parts needed. Thanks
Dennis.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
style="color: blue; text-decoration: underline;
">http://www.matronics.com/Navigator?Yak-List
blue; text-decoration: underline; ">http://forums.matronics.com
style="color: blue; text-decoration: underline;
">http://www.matronics.com/contribution
Message 5
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| Subject: | Re: Accelerator jet modification |
Great!
On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
> I did not observe any change in CHT. My engine is running better
> than before, although Dennis also found a couple of loose intake
> gland nuts and tightened them at the same time he switched the jets
> in the carb. It is really nice to push the throttle forward and feel
> an immediate surge in power.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com
> ] On Behalf Of Eric Wobschall
> Sent: Friday, September 03, 2010 10:32 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Accelerator jet modification
>
> Steve:
>
> Have you noticed any difference in CHT?
>
> -Eric
>
>
> On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
>
>
> I recently had Dennis Savarese swap the two accelerator jets on the
> carburetor of my M14P. This totally eliminated all hesitation when
> adding power on final. It is an easy modification that takes about
> an hour. The carb is a little difficult to reach but the time spent
> is well worth it. He merely switched the two jets with each other,
> no new parts needed. Thanks Dennis.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
>
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/Navigator?Yak-List
> blue; text-decoration: underline; ">http://forums.matronics.com
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/contribution
>
>
> http://www.matronics.com/Navigator?Yak-List
> http://forums.matronics.com
> http://www.matronics.com/contribution
>
>
Message 6
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| Subject: | Re: Accelerator jet modification |
Which size jets did you use?
On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
> I did not observe any change in CHT. My engine is running better
> than before, although Dennis also found a couple of loose intake
> gland nuts and tightened them at the same time he switched the jets
> in the carb. It is really nice to push the throttle forward and feel
> an immediate surge in power.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com
> ] On Behalf Of Eric Wobschall
> Sent: Friday, September 03, 2010 10:32 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Accelerator jet modification
>
> Steve:
>
> Have you noticed any difference in CHT?
>
> -Eric
>
>
> On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
>
>
> I recently had Dennis Savarese swap the two accelerator jets on the
> carburetor of my M14P. This totally eliminated all hesitation when
> adding power on final. It is an easy modification that takes about
> an hour. The carb is a little difficult to reach but the time spent
> is well worth it. He merely switched the two jets with each other,
> no new parts needed. Thanks Dennis.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
>
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/Navigator?Yak-List
> blue; text-decoration: underline; ">http://forums.matronics.com
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/contribution
>
>
> http://www.matronics.com/Navigator?Yak-List
> http://forums.matronics.com
> http://www.matronics.com/contribution
>
>
Message 7
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| Subject: | Accelerator jet modification |
He just switched the two jets. The sizes were hard to read but I think one
indicated 1.0mm and the other 0.6mm.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:55 AM
Subject: Re: Yak-List: Accelerator jet modification
Which size jets did you use?
On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
I did not observe any change in CHT. My engine is running better than
before, although Dennis also found a couple of loose intake gland nuts and
tightened them at the same time he switched the jets in the carb. It is
really nice to push the throttle forward and feel an immediate surge in
power.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:32 AM
Subject: Re: Yak-List: Accelerator jet modification
Steve:
Have you noticed any difference in CHT?
-Eric
On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
I recently had Dennis Savarese swap the two accelerator jets on the
carburetor of my M14P. This totally eliminated all hesitation when adding
power on final. It is an easy modification that takes about an hour. The
carb is a little difficult to reach but the time spent is well worth it. He
merely switched the two jets with each other, no new parts needed. Thanks
Dennis.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
style="color: blue; text-decoration: underline;
">http://www.matronics.com/Navigator?Yak-List
blue; text-decoration: underline; ">http://forums.matronics.com
style="color: blue; text-decoration: underline;
">http://www.matronics.com/contribution
http://www.matronics.com/Navigator?Yak-List
http://forums.matronics.com
http://www.matronics.com/contribution
style="color: blue; text-decoration: underline;
">http://www.matronics.com/Navigator?Yak-List
blue; text-decoration: underline; ">http://forums.matronics.com
style="color: blue; text-decoration: underline;
">http://www.matronics.com/contribution
Message 8
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| Subject: | Re: Accelerator jet modification |
thx
On Sep 3, 2010, at 11:00 AM, Steven Johnson wrote:
> He just switched the two jets. The sizes were hard to read but I
> think one indicated 1.0mm and the other 0.6mm.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com
> ] On Behalf Of Eric Wobschall
> Sent: Friday, September 03, 2010 10:55 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Accelerator jet modification
>
> Which size jets did you use?
>
>
> On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
>
>
> I did not observe any change in CHT. My engine is running better
> than before, although Dennis also found a couple of loose intake
> gland nuts and tightened them at the same time he switched the jets
> in the carb. It is really nice to push the throttle forward and feel
> an immediate surge in power.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com
> ] On Behalf Of Eric Wobschall
> Sent: Friday, September 03, 2010 10:32 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Accelerator jet modification
>
> Steve:
>
> Have you noticed any difference in CHT?
>
> -Eric
>
>
> On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
>
>
> I recently had Dennis Savarese swap the two accelerator jets on the
> carburetor of my M14P. This totally eliminated all hesitation when
> adding power on final. It is an easy modification that takes about
> an hour. The carb is a little difficult to reach but the time spent
> is well worth it. He merely switched the two jets with each other,
> no new parts needed. Thanks Dennis.
>
> Steve Johnson
> Yak 52 N9900X 0B5
> 413 522-1130 Cell
>
>
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/Navigator?Yak-List
> blue; text-decoration: underline; ">http://forums.matronics.com
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/contribution
>
>
> http://www.matronics.com/Navigator?Yak-List
> http://forums.matronics.com
> http://www.matronics.com/contribution
>
>
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/Navigator?Yak-List
> blue; text-decoration: underline; ">http://forums.matronics.com
> style="color: blue; text-decoration: underline; ">http://www.matronics.com/contribution
>
>
> http://www.matronics.com/Navigator?Yak-List
> http://forums.matronics.com
> http://www.matronics.com/contribution
>
>
Message 9
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| Subject: | Re: Accelerator jet modification |
I am actually getting fairly close to pulling out my M14 and was thinking
this might be a good time to do this modification. Does Dennis or anyone
have any documentation that might take me through this step by step? I hav
e
0 time working on this engine, so if you guys think this is too technical,
I=B9ll hold off.
It would be nice to not have to go through the =B3hesitancy=B2 learning curve -
-
Thank you,
Andy Hawes
Radial Rocket
Nashville, TN
On 9/3/10 10:10 AM, "Eric Wobschall" <eric@buffaloskyline.com> wrote:
> thx
>
>
> On Sep 3, 2010, at 11:00 AM, Steven Johnson wrote:
>
>> He just switched the two jets. The sizes were hard to read but I think o
ne
>> indicated 1.0mm and the other 0.6mm.
>>
>> Steve Johnson
>> Yak 52 N9900X 0B5
>> 413 522-1130 Cell
>>
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
>> Sent: Friday, September 03, 2010 10:55 AM
>> To: yak-list@matronics.com
>> Subject: Re: Yak-List: Accelerator jet modification
>>
>> Which size jets did you use?
>>
>>
>> On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
>>
>>
>> I did not observe any change in CHT. My engine is running better than be
fore,
>> although Dennis also found a couple of loose intake gland nuts and tight
ened
>> them at the same time he switched the jets in the carb. It is really nic
e to
>> push the throttle forward and feel an immediate surge in power.
>>
>> Steve Johnson
>> Yak 52 N9900X 0B5
>> 413 522-1130 Cell
>>
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
>> Sent: Friday, September 03, 2010 10:32 AM
>> To: yak-list@matronics.com
>> Subject: Re: Yak-List: Accelerator jet modification
>>
>> Steve:
>>
>> Have you noticed any difference in CHT?
>>
>> -Eric
>>
>>
>> On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
>>
>>
>>
>> I recently had Dennis Savarese swap the two accelerator jets on the
>> carburetor of my M14P. This totally eliminated all hesitation when addin
g
>> power on final. It is an easy modification that takes about an hour. The
carb
>> is a little difficult to reach but the time spent is well worth it. He
>> merely switched the two jets with each other, no new parts needed. Thank
s
>> Dennis.
>>
>> Steve Johnson
>> Yak 52 N9900X 0B5
>> 413 522-1130 Cell
>>
>>
>>
>> style="color: blue; text-decoration: underline;
>> ">http://www.matronics.com/Navigator?Yak-List
>> blue; text-decoration: underline; ">http://forums.matronics.com
>> style="color: blue; text-decoration: underline;
>> ">http://www.matronics.com/contribution
>>
>>
>>
>>
>>
>> http://www.matronics.com/Navigator?Yak-List
>> http://forums.matronics.com
>> http://www.matronics.com/contribution
>>
>>
>>
>> style="color: blue; text-decoration: underline;
>> ">http://www.matronics.com/Navigator?Yak-List
>> blue; text-decoration: underline; ">http://forums.matronics.com
>> style="color: blue; text-decoration: underline;
>> ">http://www.matronics.com/contribution
>>
>>
>>
>>
>>
>> http://www.matronics.com/Navigator?Yak-List
>> http://forums.matronics.com
>> http://www.matronics.com/contribution
>>
>>
>>
>> style="color: blue; text-decoration: underline;
>> ">http://www.matronics.com/Navigator?Yak-List
>> <http://www.matronics.com/contribution>
>> blue; text-decoration: underline; ">http://forums.matronics.com
>> <http://www.matronics.com/contribution>
>> style="color: blue; text-decoration: underline;
>> ">http://www.matronics.com/contribution
>> <http://www.matronics.com/contribution>
>>
>>
>
>
>
>
>
Message 10
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| Subject: | Accelerator jet modification |
Just a heads up. Not ALL M-14P's have this hesitation problem. For
example... Mine does not! The problem is fairly common on the 400
horsepower PF model... But a lot of M-14P (360 horsepower) work just
fine without modifying the carb and for that matter, so do some
M-14PF's!
This is a TUNING change to the carb. The pressure carb used in the M-14
has a lot of jets that can be changed to make the engine perform as it
should. The jet being changed here impacts the way the engine reacts
when you MOVE the throttle. It does not impact the amount of fuel the
engine is receiving when it is just "running" normally, with your hand
off the throttle. As such changing this jet should not impact normal
running "fuel to air ratio", ... Thus it does not impact cylinder head
temps.
But it is not a change that you should just put into your engine just
because someone else did. If you are experiencing problems where when
you ADD POWER to the engine, it HESITATES and kind of "thinks about it
for a split second" and THEN kind of catches up with a surge of power,
then this would be a good thing to try in order to correct that
particular problem.
On the other hand, if your engine reacts properly when you add throttle,
with a smooth and immediate change in power... Just like when you push
down on the gas pedal in your car, then DO NOT MESS WITH THIS AT ALL!
Just saying.... :-)
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Andy Hawes
Sent: Friday, September 03, 2010 12:59
Subject: Re: Yak-List: Accelerator jet modification
I am actually getting fairly close to pulling out my M14 and was
thinking this might be a good time to do this modification. Does Dennis
or anyone have any documentation that might take me through this step by
step? I have 0 time working on this engine, so if you guys think this
is too technical, I'll hold off.
It would be nice to not have to go through the "hesitancy" learning
curve --
Thank you,
Andy Hawes
Radial Rocket
Nashville, TN
On 9/3/10 10:10 AM, "Eric Wobschall" <eric@buffaloskyline.com> wrote:
thx
On Sep 3, 2010, at 11:00 AM, Steven Johnson wrote:
He just switched the two jets. The sizes were hard to
read but I think one indicated 1.0mm and the other 0.6mm.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:55 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Which size jets did you use?
On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
I did not observe any change in CHT. My engine is
running better than before, although Dennis also found a couple of loose
intake gland nuts and tightened them at the same time he switched the
jets in the carb. It is really nice to push the throttle forward and
feel an immediate surge in power.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:32 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Steve:
Have you noticed any difference in CHT?
-Eric
On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
I recently had Dennis Savarese swap the two accelerator
jets on the carburetor of my M14P. This totally eliminated all
hesitation when adding power on final. It is an easy modification that
takes about an hour. The carb is a little difficult to reach but the
time spent is well worth it. He merely switched the two jets with each
other, no new parts needed. Thanks Dennis.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
Message 11
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| Subject: | Re: Accelerator jet modification |
Re: Yak-List: Accelerator jet modificationI'm concerned that Yak owners
might think that there is a simple mod for all engines in which 2 jets
are changed.
Of course this might well work in one engine,but there are five
jets,three of which can be changed for size.
I addition there are various other adjustments in terms of fuel
pressure;altitude control.
It is not a simple carburetor,but so many in service are well out of
adjustment!!
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
----- Original Message -----
From: Andy Hawes
To: yak-list@matronics.com
Sent: Friday, September 03, 2010 5:59 PM
Subject: Re: Yak-List: Accelerator jet modification
I am actually getting fairly close to pulling out my M14 and was
thinking this might be a good time to do this modification. Does Dennis
or anyone have any documentation that might take me through this step by
step? I have 0 time working on this engine, so if you guys think this
is too technical, I'll hold off.
It would be nice to not have to go through the "hesitancy" learning
curve --
Thank you,
Andy Hawes
Radial Rocket
Nashville, TN
On 9/3/10 10:10 AM, "Eric Wobschall" <eric@buffaloskyline.com> wrote:
thx
On Sep 3, 2010, at 11:00 AM, Steven Johnson wrote:
He just switched the two jets. The sizes were hard to read but I
think one indicated 1.0mm and the other 0.6mm.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:55 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Which size jets did you use?
On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
I did not observe any change in CHT. My engine is running better
than before, although Dennis also found a couple of loose intake gland
nuts and tightened them at the same time he switched the jets in the
carb. It is really nice to push the throttle forward and feel an
immediate surge in power.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:32 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Steve:
Have you noticed any difference in CHT?
-Eric
On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
I recently had Dennis Savarese swap the two accelerator jets on
the carburetor of my M14P. This totally eliminated all hesitation when
adding power on final. It is an easy modification that takes about an
hour. The carb is a little difficult to reach but the time spent is
well worth it. He merely switched the two jets with each other, no new
parts needed. Thanks Dennis.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
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Message 12
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| Subject: | Re: Accelerator jet modification |
When I received my M-14 from the factory (over 1,500 hours ago) and mounte
d it my CJ, I too had a hesitation problem. In the parts kit that came wi
th the engine, were a set of jets for the carburetor acceleration pump.
I simply got out the smallest one and installed it. I have had that jet
in the engine since and not one hesitation problem since.
One group of guys recommended to put a be be in - in effect closing that
jet entirely. I DO NOT IN ANYWAY SUGGEST THAT. But I do believe you ne
ed a smaller jet than the one you have now.
Pappy
-----Original Message-----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E <mark.bitterlic
h@navy.mil>
Sent: Fri, Sep 3, 2010 1:16 pm
Subject: RE: Yak-List: Accelerator jet modification
ALS-14 64E" <mark.bitterlich@navy.mil>
ust a heads up. Not ALL M-14P's have this hesitation problem. For
xample... Mine does not! The problem is fairly common on the 400
orsepower PF model... But a lot of M-14P (360 horsepower) work just
ine without modifying the carb and for that matter, so do some
-14PF's!
This is a TUNING change to the carb. The pressure carb used in the M-14
as a lot of jets that can be changed to make the engine perform as it
hould. The jet being changed here impacts the way the engine reacts
hen you MOVE the throttle. It does not impact the amount of fuel the
ngine is receiving when it is just "running" normally, with your hand
ff the throttle. As such changing this jet should not impact normal
unning "fuel to air ratio", ... Thus it does not impact cylinder head
emps.
But it is not a change that you should just put into your engine just
ecause someone else did. If you are experiencing problems where when
ou ADD POWER to the engine, it HESITATES and kind of "thinks about it
or a split second" and THEN kind of catches up with a surge of power,
hen this would be a good thing to try in order to correct that
articular problem.
On the other hand, if your engine reacts properly when you add throttle,
ith a smooth and immediate change in power... Just like when you push
own on the gas pedal in your car, then DO NOT MESS WITH THIS AT ALL!
Just saying.... :-)
Mark Bitterlich
-----Original Message-----
rom: owner-yak-list-server@matronics.com
mailto:owner-yak-list-server@matronics.com] On Behalf Of Andy Hawes
ent: Friday, September 03, 2010 12:59
o: yak-list@matronics.com
ubject: Re: Yak-List: Accelerator jet modification
I am actually getting fairly close to pulling out my M14 and was
hinking this might be a good time to do this modification. Does Dennis
r anyone have any documentation that might take me through this step by
tep? I have 0 time working on this engine, so if you guys think this
s too technical, I'll hold off.
It would be nice to not have to go through the "hesitancy" learning
urve --
Thank you,
ndy Hawes
adial Rocket
ashville, TN
n 9/3/10 10:10 AM, "Eric Wobschall" <eric@buffaloskyline.com> wrote:
thx
On Sep 3, 2010, at 11:00 AM, Steven Johnson wrote:
He just switched the two jets. The sizes were hard to
ead but I think one indicated 1.0mm and the other 0.6mm.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:55 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Which size jets did you use?
On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
I did not observe any change in CHT. My engine is
unning better than before, although Dennis also found a couple of loose
ntake gland nuts and tightened them at the same time he switched the
ets in the carb. It is really nice to push the throttle forward and
eel an immediate surge in power.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
mailto:owner-yak-list-server@matronics.com] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:32 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Steve:
Have you noticed any difference in CHT?
-Eric
On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
I recently had Dennis Savarese swap the two accelerator
ets on the carburetor of my M14P. This totally eliminated all
esitation when adding power on final. It is an easy modification that
akes about an hour. The carb is a little difficult to reach but the
ime spent is well worth it. He merely switched the two jets with each
ther, no new parts needed. Thanks Dennis.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
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Message 13
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| Subject: | Accelerator jet modification |
Unless you want to simulate the hesitancy experienced when behind the power
curve at the controls of a turbo jet. Which would the next aircraft you flew
as a UPT student in the Russian AF. Not much need for that here now is it
unless you going to be flying a L-29, L-39 in the near future, or T-37 in
the near future.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of cjpilot710@aol.com
Sent: Friday, September 03, 2010 3:43 PM
Subject: Re: Yak-List: Accelerator jet modification
When I received my M-14 from the factory (over 1,500 hours ago) and mounted
it my CJ, I too had a hesitation problem. In the parts kit that came with
the engine, were a set of jets for the carburetor acceleration pump. I
simply got out the smallest one and installed it. I have had that jet in
the engine since and not one hesitation problem since.
One group of guys recommended to put a be be in - in effect closing that jet
entirely. I DO NOT IN ANYWAY SUGGEST THAT. But I do believe you need a
smaller jet than the one you have now.
Pappy
-----Original Message-----
From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mark.bitterlich@navy.mil>
Sent: Fri, Sep 3, 2010 1:16 pm
Subject: RE: Yak-List: Accelerator jet modification
MALS-14 64E" <mark.bitterlich@navy.mil>
Just a heads up. Not ALL M-14P's have this hesitation problem. For
example... Mine does not! The problem is fairly common on the 400
horsepower PF model... But a lot of M-14P (360 horsepower) work just
fine without modifying the carb and for that matter, so do some
M-14PF's!
This is a TUNING change to the carb. The pressure carb used in the M-14
has a lot of jets that can be changed to make the engine perform as it
should. The jet being changed here impacts the way the engine reacts
when you MOVE the throttle. It does not impact the amount of fuel the
engine is receiving when it is just "running" normally, with your hand
off the throttle. As such changing this jet should not impact normal
running "fuel to air ratio", ... Thus it does not impact cylinder head
temps.
But it is not a change that you should just put into your engine just
because someone else did. If you are experiencing problems where when
you ADD POWER to the engine, it HESITATES and kind of "thinks about it
for a split second" and THEN kind of catches up with a surge of power,
then this would be a good thing to try in order to correct that
particular problem.
On the other hand, if your engine reacts properly when you add throttle,
with a smooth and immediate change in power... Just like when you push
down on the gas pedal in your car, then DO NOT MESS WITH THIS AT ALL!
Just saying.... :-)
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com?> ] On Behalf Of Andy Hawes
Sent: Friday, September 03, 2010 12:59
Subject: Re: Yak-List: Accelerator jet modification
I am actually getting fairly close to pulling out my M14 and was
thinking this might be a good time to do this modification. Does Dennis
or anyone have any documentation that might take me through this step by
step? I have 0 time working on this engine, so if you guys think this
is too technical, I'll hold off.
It would be nice to not have to go through the "hesitancy" learning
curve --
Thank you,
Andy Hawes
Radial Rocket
Nashville, TN
On 9/3/10 10:10 AM, "Eric Wobschall" <eric@buffaloskyline.com> wrote:
thx
On Sep 3, 2010, at 11:00 AM, Steven Johnson wrote:
He just switched the two jets. The sizes were hard to
read but I think one indicated 1.0mm and the other 0.6mm.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com?> ] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:55 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Which size jets did you use?
On Sep 3, 2010, at 10:50 AM, Steven Johnson wrote:
I did not observe any change in CHT. My engine is
running better than before, although Dennis also found a couple of loose
intake gland nuts and tightened them at the same time he switched the
jets in the carb. It is really nice to push the throttle forward and
feel an immediate surge in power.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com?> ] On Behalf Of Eric Wobschall
Sent: Friday, September 03, 2010 10:32 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Accelerator jet modification
Steve:
Have you noticed any difference in CHT?
-Eric
On Sep 3, 2010, at 10:22 AM, Steven Johnson wrote:
I recently had Dennis Savarese swap the two accelerator
jets on the carburetor of my M14P. This totally eliminated all
hesitation when adding power on final. It is an easy modification that
takes about an hour. The carb is a little difficult to reach but the
time spent is well worth it. He merely switched the two jets with each
other, no new parts needed. Thanks Dennis.
Steve Johnson
Yak 52 N9900X 0B5
413 522-1130 Cell
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