>
> John
>
> I do not have an engine manual(yet) but this sounds like the problem . I just
> ran it up and down the runway and it it worked fine. Did a last full power run
> up and presto, it came back. Engine backs off to about 1800 rpm. Until I pull
> the throttle back to the approx 1800rpm position it is rough. So when it smooths
> out I pushed it back up and lost power again. The next time, I pulled the
> throttle back till it smoothed out and held it for 10 seconds and pushed it back
> up and I got about 10 seconds of full power. It was like the carb would fill
> back up. So based on what you said I think you have nailed it. What scat hose
> where??
>
>
>
>
> John Ellis wrote:
> I had a problem with our PT-19 sort of like yours. I completed a major
> overhaul of the engine about 18 hours prior to this starting. Engine operation
> was normal in every way.
>
> Takeoff full power everything normal, power reduction to 2200, the engine
> started to run rough, advance back to full power, still rough. Reduce power back
> to 1500 or less, engine smoothed out, ran normal, back to cruse power rough.
>
> I thought it must be mag related problem, went through both mags again, no
> change, then wires, then plugs, then replaced mags from another Ranger, no
> change.
>
> Carb adjustment was checked and was sure carb was OK, had cleaned and checked
> needle/seat, float, checked all AD's complied with,and replaced all gaskets at
> engine major.
>
> Took 2 or 3 other A/P's up to show them problem, No one had a better idea.
>
> Decided to remove and go through carb again.
>
> Problem found when removal of carb was started, scat hose was 2 ply, inner part
> was loose and would fold down and act as a choke.. Hose had been replaced at
> overhaul.
>
> Had about 4 months of spare time fun with this.
>
> John
>
> ----- Original Message -----
> From: michael Steiger
> To:
fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 11:13 AM
> Subject: Re: [fairchildclub] Power surge. Has this happened to you with the
> Ranger 440
>
> Super thought but icing conditions did not exist. My cub ices up around 60
> degrees and 50% humidity and I am cautious of it but as you know, It can happen
> anytime when the conditions are met.... It was cold but clear with 35%
> humidity.. Thanks! Michael
>
> Michael Denest wrote: What type aircraft? What was the OAT at
> the time? Where are you located? It is possible that you may have experienced
> carb icing. Did you pull the carb heat on?
>
> Mike
>
> Quando omni flunkus moritati
> (If all else fails, play dead)
> - "Red" Green
>
> ----- Original Message ----
> From: michael Steiger
> To:
fairchildclub@yahoogroups.com
> Sent: Monday, January 21, 2008 10:19:28 AM
> Subject: [fairchildclub] Power surge. Has this happened to you with the Ranger
> 440
>
> I am getting a power surge about 6 secends into the takeoff. Static rpm 2100 and
> mag checks good. Fuel is full on both tanks and fuel psi is stable on 5 and
> dosnt surge when the engine does. What happened.... I was departing on downwind
> and the engine rolled back to 1800rpm and went rough. I pitched back and landed.
> during the 20 seconds it was rough I checked mags and roughness continued and
> then I pulled the mixture 1/2 way back and nothing so I pushed it in and by then
> it stopped and I was on final.
>
> After landing I ran it up again and got the drop but not roughness. I checked
> plug connections and airfilter and all is well. I went back out and ran it down
> the runway after a static check of about a min and it rolled back again so I
> aborted. This continued... .
>
> Anybody have a guess or has had this happened. I am about to break into the
> plane and start from scratch but was hoping for insight. Fuel was fresh and full
> as the plane is always flown. The engine has 125 smoh.
>
> ------------ --------- --------- ---
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
>
> [Non-text portions of this message have been removed]
>
> __________________________________________________________
> Never miss a thing. Make Yahoo your home page.
>
http://www.yahoo.com/r/hs
>
> [Non-text portions of this message have been removed]
>
> ---------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
> ---------------------------------
> Never miss a thing. Make Yahoo your homepage.
>
> [Non-text portions of this message have been removed]
>