Today's Message Index:
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1. 02:22 AM - J3 flyers (Phil Sisson, Litchfield Aerobatic Club)
2. 06:59 AM - Re: J3 flyers (Cy Galley)
3. 09:12 AM - Re: J3 flyers (Phil Sisson, Litchfield Aerobatic Club)
Message 1
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--> Cub-List message posted by: "Phil Sisson, Litchfield Aerobatic Club" <sisson@consolidated.net>
Has anyone had the following engine problems with a cub.
All replies will be answered.
On roll out the engine quits.
Conditions:
Eiseman mags---rebuilt, seems to be good rebuild and will throw 3/8"
blue spark on bench.
Carburetor is a Stromberg Nas3- it was rebuilt buy a carb shop. since
then, we have had it apart and checked float level. all passages are
clean, jets are the right size, and visually it seems like it is good.
It has a plastic needle and new seat, We also tried a steel needle and
new seat. All AD's and notes have been complied with on this carb.
We have idle set to 550 to 600. after landing in three point roll out
the engine will quit nearly every time. engine will quit when taxiing
in, if idle speed gets too low.
We try to keep it 800 or above to keep from dying, Plugs are wet and it
seems to be a low rpm mixture problem. once it decides to die, it is
just like you turn off the mags switch. It can't be caught and brought
back. When you go to start it, without touching anything, it will catch
on the third blade and run real goo for a few minutes like nothing ever
happened, then die unless you keep it reved up a little. Black smoke
will puff out at the lower rpm's when you throttle it up. This indicates
excess richness at idle setting and the wet plugs do too.
when we lean the idle mixture to stop the black smoke, it will pop
indicating too lean of an idle mixture.
Static runs are good, no missing and it turns about 2100 to 2200. Mag
checks are good, maybe 25 or so drop on both mags. I would call it good.
In the air at cruise, it is just great. When first starting here in the
midwest at this time of year, it is very cold natured. Maybe have to
start it two or three times to get it going and keeping it going. We
have been running av-gas, premium car gas, and non alcohol regular.
seems like the same thing with any of the fuels.
We also get a small fuel drip at shut down for a couple of minutes. This
doesnt seem bad, but I know that all 65 hp dont drip like this and I
feel there is a relationship between the drip and the richness.
The engine has about 100 SMOH and runs great. it is just the low RPM
problem that is bothering us. Five of use bought this plane and it had a
rebuild in 1998. I learned to fly in it back in 1963. I looked at log
book and I put 43 hours in it then. First solo and all cross countries
and time building. It was ok back then. I was flying it in the winter
and I don't even remember it as being cold natured then. I even used to
know how to land it.
Any help or more questions... fire away.
Phil in Litchfield, IL 1946 J-3 C65 N88096
Message 2
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--> Cub-List message posted by: "Cy Galley" <cgalley@qcbc.org>
Sounds like an intake system leak. Gasket or hoses.
----- Original Message -----
From: "Phil Sisson, Litchfield Aerobatic Club" <sisson@consolidated.net>
Subject: Cub-List: J3 flyers
> --> Cub-List message posted by: "Phil Sisson, Litchfield Aerobatic Club"
<sisson@consolidated.net>
>
> Has anyone had the following engine problems with a cub.
> All replies will be answered.
>
> On roll out the engine quits.
>
> Conditions:
>
> Eiseman mags---rebuilt, seems to be good rebuild and will throw 3/8"
> blue spark on bench.
>
> Carburetor is a Stromberg Nas3- it was rebuilt buy a carb shop. since
> then, we have had it apart and checked float level. all passages are
> clean, jets are the right size, and visually it seems like it is good.
> It has a plastic needle and new seat, We also tried a steel needle and
> new seat. All AD's and notes have been complied with on this carb.
>
> We have idle set to 550 to 600. after landing in three point roll out
> the engine will quit nearly every time. engine will quit when taxiing
> in, if idle speed gets too low.
>
> We try to keep it 800 or above to keep from dying, Plugs are wet and it
> seems to be a low rpm mixture problem. once it decides to die, it is
> just like you turn off the mags switch. It can't be caught and brought
> back. When you go to start it, without touching anything, it will catch
> on the third blade and run real goo for a few minutes like nothing ever
> happened, then die unless you keep it reved up a little. Black smoke
> will puff out at the lower rpm's when you throttle it up. This indicates
> excess richness at idle setting and the wet plugs do too.
> when we lean the idle mixture to stop the black smoke, it will pop
> indicating too lean of an idle mixture.
>
> Static runs are good, no missing and it turns about 2100 to 2200. Mag
> checks are good, maybe 25 or so drop on both mags. I would call it good.
> In the air at cruise, it is just great. When first starting here in the
> midwest at this time of year, it is very cold natured. Maybe have to
> start it two or three times to get it going and keeping it going. We
> have been running av-gas, premium car gas, and non alcohol regular.
> seems like the same thing with any of the fuels.
>
> We also get a small fuel drip at shut down for a couple of minutes. This
> doesnt seem bad, but I know that all 65 hp dont drip like this and I
> feel there is a relationship between the drip and the richness.
>
> The engine has about 100 SMOH and runs great. it is just the low RPM
> problem that is bothering us. Five of use bought this plane and it had a
> rebuild in 1998. I learned to fly in it back in 1963. I looked at log
> book and I put 43 hours in it then. First solo and all cross countries
> and time building. It was ok back then. I was flying it in the winter
> and I don't even remember it as being cold natured then. I even used to
> know how to land it.
>
> Any help or more questions... fire away.
>
> Phil in Litchfield, IL 1946 J-3 C65 N88096
>
>
Message 3
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--> Cub-List message posted by: "Phil Sisson, Litchfield Aerobatic Club" <sisson@consolidated.net>
Cy Galley wrote:
> --> Cub-List message posted by: "Cy Galley" <cgalley@qcbc.org>
>
> Sounds like an intake system leak. Gasket or hoses.
>
> ----- Original Message -----
> From: "Phil Sisson, Litchfield Aerobatic Club" <sisson@consolidated.net>
> To: <cub-list@matronics.com>
> Subject: Cub-List: J3 flyers
>
> > --> Cub-List message posted by: "Phil Sisson, Litchfield Aerobatic Club"
> <sisson@consolidated.net>
> >
> > Has anyone had the following engine problems with a cub.
> > All replies will be answered.
> >
> > On roll out the engine quits.
> >
> > Conditions:
> >
> > Eiseman mags---rebuilt, seems to be good rebuild and will throw 3/8"
> > blue spark on bench.
> >
> > Carburetor is a Stromberg Nas3- it was rebuilt buy a carb shop. since
> > then, we have had it apart and checked float level. all passages are
> > clean, jets are the right size, and visually it seems like it is good.
> > It has a plastic needle and new seat, We also tried a steel needle and
> > new seat. All AD's and notes have been complied with on this carb.
> >
> > We have idle set to 550 to 600. after landing in three point roll out
> > the engine will quit nearly every time. engine will quit when taxiing
> > in, if idle speed gets too low.
> >
> > We try to keep it 800 or above to keep from dying, Plugs are wet and it
> > seems to be a low rpm mixture problem. once it decides to die, it is
> > just like you turn off the mags switch. It can't be caught and brought
> > back. When you go to start it, without touching anything, it will catch
> > on the third blade and run real goo for a few minutes like nothing ever
> > happened, then die unless you keep it reved up a little. Black smoke
> > will puff out at the lower rpm's when you throttle it up. This indicates
> > excess richness at idle setting and the wet plugs do too.
> > when we lean the idle mixture to stop the black smoke, it will pop
> > indicating too lean of an idle mixture.
> >
> > Static runs are good, no missing and it turns about 2100 to 2200. Mag
> > checks are good, maybe 25 or so drop on both mags. I would call it good.
> > In the air at cruise, it is just great. When first starting here in the
> > midwest at this time of year, it is very cold natured. Maybe have to
> > start it two or three times to get it going and keeping it going. We
> > have been running av-gas, premium car gas, and non alcohol regular.
> > seems like the same thing with any of the fuels.
> >
> > We also get a small fuel drip at shut down for a couple of minutes. This
> > doesnt seem bad, but I know that all 65 hp dont drip like this and I
> > feel there is a relationship between the drip and the richness.
> >
> > The engine has about 100 SMOH and runs great. it is just the low RPM
> > problem that is bothering us. Five of use bought this plane and it had a
> > rebuild in 1998. I learned to fly in it back in 1963. I looked at log
> > book and I put 43 hours in it then. First solo and all cross countries
> > and time building. It was ok back then. I was flying it in the winter
> > and I don't even remember it as being cold natured then. I even used to
> > know how to land it.
> >
> > Any help or more questions... fire away.
> >
> > Phil in Litchfield, IL 1946 J-3 C65 N88096
Thanks for the reply CY. We have not checked that. but it is a good starting
point. I will keep you and the list informed of my progress.
Phil.
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