Today's Message Index:
----------------------
1. 04:00 AM - problems with power (Txusma y Merche)
2. 05:26 AM - Re: problems with power (A. Dennis Savarese)
3. 06:29 AM - Re: problems with power (Brian Lloyd)
4. 06:50 AM - Re: problems with power (A. Dennis Savarese)
5. 01:42 PM - Re: problems with power (Craig Payne)
6. 04:22 PM - Re: problems with power (A. Dennis Savarese)
7. 06:25 PM - Need Balkan 5 VHF Radio Control Unit (PSalter@aol.com)
8. 10:12 PM - Flyovers to welcome the USS Abraham Lincoln (Yakjock)
Message 1
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| Subject: | problems with power |
--> Yak-List message posted by: "Txusma y Merche" <jsagastuy@euskalnet.net>
Thank you with your former advices but I continue with the problems
I check magnetos and propeller at 70% without problems.
But when I increase to 80% and try to increase the admision pression to more or
less 750 the powers goes down. If I reduce the admision presion the power recover
80 %. The problem always appears at the same pressure.
It is imposible to get more than 80% or more pression. Is this a problem with the
turbocompresor ??
Thank you
Jesus EC-IAQ
Message 2
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| Subject: | Re: problems with power |
--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
Check the intake gland nuts for looseness. Check the intake collars on the
cylinders. Check that the primer pump is vertical when starting the engine.
Primer pump could be defective as well. Clean both the course AND fine fuel
filters. Try pumping the primer pump on both the system side and the engine
side while at 80% to see if that affects the operation.
Good luck.
Dennis Savarese
----- Original Message -----
From: "Txusma y Merche" <jsagastuy@euskalnet.net>
Subject: Yak-List: problems with power
> --> Yak-List message posted by: "Txusma y Merche"
<jsagastuy@euskalnet.net>
>
> Thank you with your former advices but I continue with the problems
> I check magnetos and propeller at 70% without problems.
> But when I increase to 80% and try to increase the admision pression to
more or less 750 the powers goes down. If I reduce the admision presion the
power recover 80 %. The problem always appears at the same pressure.
> It is imposible to get more than 80% or more pression. Is this a problem
with the turbocompresor ??
>
> Thank you
>
> Jesus EC-IAQ
>
>
Message 3
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| Subject: | Re: problems with power |
--> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
Txusma y Merche wrote:
> --> Yak-List message posted by: "Txusma y Merche" <jsagastuy@euskalnet.net>
>
> Thank you with your former advices but I continue with the problems
> I check magnetos and propeller at 70% without problems.
> But when I increase to 80% and try to increase the admision pression to more
or less 750 the powers goes down. If I reduce the admision presion the power recover
80 %. The problem always appears at the same pressure.
> It is imposible to get more than 80% or more pression. Is this a problem with
the turbocompresor ??
No, that is not likely. If the supercharger were not working properly it would
show up as a reduction or a failue to increase the manifold pressure (admission
pressure).
The advice that Dennis gave you is very good and you should try the things that
he suggests. My only disagreement is that I do not think that your problem is
caused by an induction leak. That would more likely show up as poor running and
perhaps backfiring at low throttle settings when extra air is being admitted by
the leak causing the mixture to be too lean at idle, not at high throttle settings.
So you have a possibility of three problems: not enough fuel getting to the
engine, not enough air getting to the engine, or spark plugs failing to fire
when the pressure is high in the cylinder.
Does the engine run poorly and roughly as the RPM decreases when you advance the
throttle? If so, change the plugs first. If not, look for a reduction in fuel
flow.
Do check your airbox to see if perhaps the alternate air door or something like
it is somehow coming loose and blocking the intake to the carburetor. That
could choke off the airflow when it increases. Also have someone look at the
exhaust to see if it shows black smoke when you try to advance the throttle to
full power. That would indicated excessively rich mixture which could also
indicate an induction blockage.
--
Brian Lloyd 6501 Red Hook Plaza, Suite 201
brian@lloyd.com St. Thomas, VI 00802
+1.340.998.9447 - voice +1.360.838.9669 - fax
Message 4
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| Subject: | Re: problems with power |
--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
One other tried and true fix for a vast percentage of the misfiring problems
on the M14, particularly at higher RPM, is to lubricate all plug wires in
the wiring harness with a silicone type spray or something similar. Arcing
occurs between the poor Russian 5 mm wire and the braided shield or the
wiring harness ring itself. Loosen the 22 mm nuts on both the plug elbow
end and on the wiring harness ring on the back side of the engine and spray
the silicone lubricant into the braided plug wires. This is not an easy
task on the wiring harness ring. But it should be done. You can also spray
the silicone onto the braided shields as the lubricant will wick through the
braid. All plug wires above the horizontal position can usually be done
from the plug elbow end only as the lubricant will run down hill. But for
all plug wires below the horizontal position, you should remove the 22 mm
nut on the wiring harness ring and spray in between the 5 mm plug wire and
the braid.
Dennis Savarese
----- Original Message -----
From: "Brian Lloyd" <brian@lloyd.com>
Subject: Re: Yak-List: problems with power
> --> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
>
> Txusma y Merche wrote:
> > --> Yak-List message posted by: "Txusma y Merche"
<jsagastuy@euskalnet.net>
> >
> > Thank you with your former advices but I continue with the problems
> > I check magnetos and propeller at 70% without problems.
> > But when I increase to 80% and try to increase the admision pression to
more or less 750 the powers goes down. If I reduce the admision presion the
power recover 80 %. The problem always appears at the same pressure.
> > It is imposible to get more than 80% or more pression. Is this a problem
with the turbocompresor ??
>
> No, that is not likely. If the supercharger were not working properly it
would
> show up as a reduction or a failue to increase the manifold pressure
(admission
> pressure).
>
> The advice that Dennis gave you is very good and you should try the things
that
> he suggests. My only disagreement is that I do not think that your
problem is
> caused by an induction leak. That would more likely show up as poor
running and
> perhaps backfiring at low throttle settings when extra air is being
admitted by
> the leak causing the mixture to be too lean at idle, not at high throttle
settings.
>
> So you have a possibility of three problems: not enough fuel getting to
the
> engine, not enough air getting to the engine, or spark plugs failing to
fire
> when the pressure is high in the cylinder.
>
> Does the engine run poorly and roughly as the RPM decreases when you
advance the
> throttle? If so, change the plugs first. If not, look for a reduction in
fuel
> flow.
>
> Do check your airbox to see if perhaps the alternate air door or something
like
> it is somehow coming loose and blocking the intake to the carburetor.
That
> could choke off the airflow when it increases. Also have someone look at
the
> exhaust to see if it shows black smoke when you try to advance the
throttle to
> full power. That would indicated excessively rich mixture which could
also
> indicate an induction blockage.
>
> --
>
> Brian Lloyd 6501 Red Hook Plaza, Suite 201
> brian@lloyd.com St. Thomas, VI 00802
> +1.340.998.9447 - voice +1.360.838.9669 - fax
>
>
Message 5
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| Subject: | Re: problems with power |
--> Yak-List message posted by: Craig Payne <cpayne@mc.net>
Dennis,
I agree, the plug wires manifest a mess of problems that never seem to
look like "plug wires". However, on my way back from SNF this year
(another 3 day trip) I got caught in two days of rain with no hanger.
On a cool damp morning, in, can you believe Georgia, the engine started
normally and I warmed up taxiied out but during my run up the engine
would almost die when I advanced the throttle, even slowly. Back at the
ramp I dropped the cowl and did a mini-annual. No joy.
Started again and after 15 mins of run time on the ramp; same problem.
Then in desperation, I gave the primer a stroke. Amazing, the engine
suddenly got past the dead spot and ran normally. No problems since.
Diagnosis: During the previous late afternoon, I think that some water
and an air leak resulted from rainwater coming in through the canopy.
Yes I did the old 180 turn when I really ran into a wall of wet and no
sooner than after I beat feet back to the nearest airport away from the
storm, it caught up with me and soaked the cockpit.
Geez I love the taste of airport coffee during a
thunderstorm...especially from the safety of the hanger and not sweating
behind the needles.
Craig Payne
A. Dennis Savarese wrote:
>
> --> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
>
> One other tried and true fix for a vast percentage of the misfiring problems
> on the M14, particularly at higher RPM, is to lubricate all plug wires in
> the wiring harness with a silicone type spray or something similar. Arcing
> occurs between the poor Russian 5 mm wire and the braided shield or the
> wiring harness ring itself. Loosen the 22 mm nuts on both the plug elbow
> end and on the wiring harness ring on the back side of the engine and spray
> the silicone lubricant into the braided plug wires. This is not an easy
> task on the wiring harness ring. But it should be done. You can also spray
> the silicone onto the braided shields as the lubricant will wick through the
> braid. All plug wires above the horizontal position can usually be done
> from the plug elbow end only as the lubricant will run down hill. But for
> all plug wires below the horizontal position, you should remove the 22 mm
> nut on the wiring harness ring and spray in between the 5 mm plug wire and
> the braid.
> Dennis Savarese
-======================================================================
Message 6
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| Subject: | Re: problems with power |
--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
Craig,
I also agree about the primer. It's amazing what symptoms have showed up
because of a leaking primer or moisture or air in the priming system. Heck,
all we have to do is leave the primer handle in the 45 degree position and
you'll definitely have a misfiring and belching engine. One of my close YAK
52 friends has been chasing a problem that "cures itself" whenever he pumps
the primer. Then he flies for a couple of hours and bingo, same problem all
over again. Pump the primer hard on the system side and poof it disappears
again. Fuel pressure is always right on the money. I loaned him a new
primer pump I had in my spares so that he could R & R his to see if that
fixes the problem.
Dennis Savarese
----- Original Message -----
From: "Craig Payne" <cpayne@mc.net>
Subject: Re: Yak-List: problems with power
> --> Yak-List message posted by: Craig Payne <cpayne@mc.net>
>
> Dennis,
>
> I agree, the plug wires manifest a mess of problems that never seem to
> look like "plug wires". However, on my way back from SNF this year
> (another 3 day trip) I got caught in two days of rain with no hanger.
>
> On a cool damp morning, in, can you believe Georgia, the engine started
> normally and I warmed up taxiied out but during my run up the engine
> would almost die when I advanced the throttle, even slowly. Back at the
> ramp I dropped the cowl and did a mini-annual. No joy.
>
> Started again and after 15 mins of run time on the ramp; same problem.
> Then in desperation, I gave the primer a stroke. Amazing, the engine
> suddenly got past the dead spot and ran normally. No problems since.
>
> Diagnosis: During the previous late afternoon, I think that some water
> and an air leak resulted from rainwater coming in through the canopy.
> Yes I did the old 180 turn when I really ran into a wall of wet and no
> sooner than after I beat feet back to the nearest airport away from the
> storm, it caught up with me and soaked the cockpit.
>
> Geez I love the taste of airport coffee during a
> thunderstorm...especially from the safety of the hanger and not sweating
> behind the needles.
>
> Craig Payne
>
> A. Dennis Savarese wrote:
> >
> > --> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
> >
> > One other tried and true fix for a vast percentage of the misfiring
problems
> > on the M14, particularly at higher RPM, is to lubricate all plug wires
in
> > the wiring harness with a silicone type spray or something similar.
Arcing
> > occurs between the poor Russian 5 mm wire and the braided shield or the
> > wiring harness ring itself. Loosen the 22 mm nuts on both the plug
elbow
> > end and on the wiring harness ring on the back side of the engine and
spray
> > the silicone lubricant into the braided plug wires. This is not an easy
> > task on the wiring harness ring. But it should be done. You can also
spray
> > the silicone onto the braided shields as the lubricant will wick through
the
> > braid. All plug wires above the horizontal position can usually be done
> > from the plug elbow end only as the lubricant will run down hill. But
for
> > all plug wires below the horizontal position, you should remove the 22
mm
> > nut on the wiring harness ring and spray in between the 5 mm plug wire
and
> > the braid.
> > Dennis Savarese
> -======================================================================
>
>
Message 7
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| Subject: | Need Balkan 5 VHF Radio Control Unit |
--> Yak-List message posted by: PSalter@aol.com
Greetings,
If anyone has a Balkan 5 radio control unit for sale, I need to purchase one.
Email me at psalter@aol.com
Thanks
Phil Salter
Message 8
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| Subject: | Flyovers to welcome the USS Abraham Lincoln |
--> Yak-List message posted by: "Yakjock" <Yakjock@msn.com>
The Lincoln docks at Everett, Washington about 9:30 Tuesday morning (PDT). A group
I belong to, the Cascade Warbirds, will have about 21 planes - including
my solo CJ - doing flyovers as she nears the dock. Would have loved to have had
a four ship or two!
Cheers,
Hal
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