Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

egt

Matronics Email Lists Forum Index -> Kolb-List

View previous topic :: View next topic

Author Message

tc1917(at)bellsouth.net
Guest

Posted: Thu May 12, 2011 2:03 am Post subject: egt

well, got egt problems again.  seems like every time I get them straightened 

out, six months or so later, more trouble.  tried all kinds of tests, 

switching them, trying different ones, checked here and there.  cant seem to 

isolate the problem.  next I am going to remove the wires from the glass 

gauge unit and install a short extension right to the probes.  this should 

tell me something.   went flying and everything was cool and all of a sudden 

a bobble in the engine.  did it again and lost power.  was able to keep it 

running in order to have a little power on off field landing. (sixth time I 

have had an emergency landing off field)  landed okay and called my wife to 

come with the trailer.  the micro filter just slammed plain shut on me while 

flying.  never seen nothing like this.  could not even blow through it.  no 

light, no air and could not clean it.  don't know what clogged it.  replace 

it and the secondary filter and everything is fine.  now, back to the egt. 

I have a flashing light when something is wrong on the temps. the egt should 

have lighted up or at least shown a lean condition  when it ran out of gas 

in the carbs.  was wondering what do I need them for?  are the egts really 

necessary?  Anyone running without them.  I remember airwolf telling me they 

do not recommend them on 912s being as they are 2 strokers.  any comments? 

Ted Cowan, Slingshot 912 zoom zoom

Mike Welch

Joined: 13 Feb 2011
Posts: 272

Posted: Thu May 12, 2011 4:12 am Post subject: egt

 >the micro filter just slammed plain shut on me while 

 	  Quote: 	
		   flying.

 > I have a flashing light when something is wrong on the temps. the egt should 
	


 	  Quote: 	
		   have lighted up or at least shown a lean condition when it ran out of gas 

 in the carbs. was wondering what do I need them for? are the egts really 

 necessary? Anyone running without them. I remember airwolf telling me they 

 do not recommend them on 912s being as they are 2 strokers. any comments? 

 Ted Cowan, Slingshot 912 zoom zoom

  
	


 Ted,

  

   Comments?  Here's a couple;  

  

   I would use that microfilter again for NO amount of

 money.  I'd take that sucker apart and find out WHY it slammed shut. 



   Is an EGT necessary?  Some would say no, some say yes.  Personally,

 I LIKE knowing how well my engine is running (or how poorly).  I'd

 say, "if your engine always runs perfect, and never, ever has any problems,

 don't worry about an EGT."

  

   Lastly, tell the guy at Airwolf he should refrain from giving advice on

 912s 2 strokes.......'cause thar ain't any such critter!!'

  

 Mike Welch

 		 	   		    [quote][b]

Mike Welch

Joined: 13 Feb 2011
Posts: 272

Posted: Thu May 12, 2011 4:15 am Post subject: egt

Last response was supposed to say "WOULDN'T use that filter".  Note to

 self;  proof-read BEFORE you push 'send'.  At any rate, I'm sure you got

 the idea.

  

 Mike

 

  		 	   		    [quote][b]

zeprep251(at)aol.com
Guest

Posted: Thu May 12, 2011 4:23 am Post subject: egt

Ted,

 It is possible you have too fine a filter?I have seen a filter remove fuel additives and clog.It was a teflon additive that could pass through the carb and jetting with out problems but closed the filter.In theory,other than water,any particle smaller than the smallest orifice in the carb should not give you trouble,and that may be judged by the mesh of the filter screen that surrounds the main jet.

    The number of power failures you've had is amazing.Have you been able to locate the specific cause for each of them?I have a friend with a 912s on a mk3c that has had at least 2 events of lost power,fuel starvation in both cases ,but he has not identified the root cause for either.But he has stated that both times the fuel level in the tanks was close to half,but he failed to engage the aux pump either time.

   It takes a few seconds for the egt probe to sense change.You may have had not enough time to register the change on a 4 stroke.

         Could you give me some insight into your other power failures?

 Thanks,G.Aman MK3C jabiru2200A 600+hrs  .

  

    

  

    

     

  

     

  

    --

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Thu May 12, 2011 5:02 am Post subject: egt

are the egts really

necessary?  Anyone running without them.   Ted Cowan, Slingshot 912 zoom 

zoom



Ted C/Gang:



I have never run EGT gauges with my 912 engines.  Have never felt I needed 

to monitor EGTs, with nearly 3,000 hours flying in front of 912 engines.



john h

mkIII

Titus, Alabama

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

Richard Pike

Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

Posted: Thu May 12, 2011 7:01 am Post subject: Re: egt

Let me suggest that you Google "fuel strainer sock," for in-tank use as your fuel pickup. Something like this: http://www.ssdieselsupply.com/product_338_In_Tank_Fuel_StrainerSock.html

There are other versions that have the pickup outlet in the side. 



Then go to your friendly auto parts store with a good idea of what you want, and start browsing. As long as it is a likely candidate to go on the end of your fuel pickup tube, or inside the tank over your tank outlet, that's what you want. Pick out something with lots of surface area, and an opening that will easily adapt to your plumbing.  Then it will be unlikely for your inline filter to ever see any junk.



As Barney Fife says, "NIP IT IN THE BUD!"



Richard Pike

MKIII N420P (420ldPoops)

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Thu May 12, 2011 8:04 am Post subject: egt

Let me suggest that you Google "fuel strainer sock," for in-tank use as 

your fuel pickup. Something like this: 

http://www.ssdieselsupply.com/product_338_In_Tank_Fuel_StrainerSock.html

 Richard Pike





Richard P/Gang:



I use a finger strainer in the tank.



http://www.aircraftspruce.com/catalog/appages/fingstrainers.php



And a Purolator inline glass tube filter.  I replaced the glass tube with a 

piece of .58" alum tube.  Had my first glass tube crack first night it was 

installed.



Easy to stick a few elements in my flight bag if I should need them on a 

trip.  Usually get 100 hours on an element.



Elements can be cleaned in an emergency to get back into the air if you 

don't have a new replacement.



john h

mkIII

Titus, Alabama

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Thu May 12, 2011 8:24 am Post subject: egt

And a Purolator inline glass tube filter.   john h





Gang:



This is what the filter looks like:



http://www.eangler.com/product/MP80813459.htm?utm_medium=cpa&utm_source=Shopping



john h

mkIII

Titus, Alabama

_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

byoungplumbing(at)gmail.c
Guest

Posted: Thu May 12, 2011 10:58 am Post subject: egt

Gang:



This is what the filter looks like:



http://www.eangler.com/product/MP80813459.htm?utm_medium=cpa&utm_source=Shopping



john h

mkIII

Titus, Alabama



 	  Quote: 	
		  >>>>>>>>>>>>>>>>>>>>>>>>>>


	


i have had one of these filters in my boat for years,,,, and never once had 

an issue,   sold the boat to my son and i don't think he has had any 

problems.  unless there is a difference  in the elements,,,  mine was more 

of a fine mesh screen, not like a paper element,,,  i could take it apart to 

clean it.  being a fine mesh screen it would not plug up if there happened 

to be any moisture come through.    and if installed vertical, the moisture 

could accumulate in the bottom of the filter glass before it got to the 

filter element,  unless there were a LOT of water.



boyd young

mkiii utah

Thom Riddle

Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)

Posted: Fri May 13, 2011 4:26 am Post subject: Re: egt

"any particle smaller than the smallest orifice in the carb should not give you trouble,"



Gary,

Not to put too fine a point on this, but the smallest orifice in the carb may not be the smallest opening. The jet needle to needle jet gap gets pretty small at low throttle. The opening in this case is a very narrow annular ring. I think Bing specifies a .1 mm (.004") final fuel filter.

_________________
Thom Riddle
Buffalo, NY (9G0)

Don't worry about old age... it doesn't last very long.
- Anonymous

zeprep251(at)aol.com
Guest

Posted: Mon May 16, 2011 4:31 am Post subject: egt

Thom,

 Agree,that's probably the mesh size of the screen.You can check it with your pin drills.

    

  

     G.A.

  

    

     

  

     

  

    --

Display posts from previous:

	Matronics Email Lists Forum Index -> Kolb-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum