Today's Message Index:
----------------------
1. 11:22 AM - Re: Float doesn't (teamgrumman@aol.com)
2. 12:16 PM - Tire wear (teamgrumman@AOL.COM)
3. 12:19 PM - Re: Float doesn't (flyv35b)
4. 07:42 PM - Re: Tire wear (n32romeo@AOL.COM)
Message 1
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| Subject: | Re: Float doesn't |
Floats in carburetors have been around for over 100 years. ?It amazes me how carbs
in cars have managed to avoid recalls every couple of years to fix a problem
with floats. ?Why not have Holley, Edelbrock, Carter or General Motors build
the floats? ? It's not like GM doesn't need the work. ?
-----Original Message-----
From: flyv35b <flyv35b@minetfiber.com>
Sent: Sun, Sep 20, 2009 2:36 pm
Subject: Re: TeamGrumman-List: Float doesn't
Gary, after our phone conversation Friday about this,
it doesn't surprise me.? The float was sinking, raising the fuel level and
making it run very rich.? Probably could have diagnosed it by leaning the
mixture manually until it smoothed out and that would have told you it was to
rich (20/20 hindsight, right?).
?
Cliff
----- Original Message -----
From:
teamgrumman@aol.com
Sent: Sunday, September 20, 2009 9:58
AM
Subject: TeamGrumman-List: Float
doesn't
I had a customer called several weeks ago saying his engine
felt 'weird' on a landing, kind of like it wanted to stall. ?As he rolled
out onto the taxiway, the engine felt normal. ?We made an appointment to
check it out, and left it at that. ?The next few flights were about the
same. ?He didn't worry much about the engine. ?
A couple of weeks ago (oh, he never did come down to have it checked out)
he called saying it was worse. ?
Note: ?He has a Cheetah. ?Several years ago I had a customer
with the same symptoms with his Cheetah and it was the mixture needle working
it's way out. ?
I had him check the mixture screw and turn it in a 1/4 turn and said to
bring it in. ?He planned to bring it in but never did. ?The engine
'felt' better. ?
Last week, he called saying it was getting a lot worse. ?He said it
barely ran at idle. ?He finally brought it in last Friday. ?
I looked for all of the basic stuff, leaks at the intake tubes, mixture
screw, looked for leaks on the carb . . . . nothing. ?We removed the
cowling and airbox. ?Several years ago, the accelerator nozzle in the
carb on my Cheetah had fallen out and was lying in the bottom of the airbox.
?I expected to find something like that. ?Nothing. ?Venturi was
tight,?accelerator nozzle was tight . . . ?nothing. ?I removed
the carb.
I expected to find debris in the bottom of the carb. ?Nothing.
?Then I noticed one of the semi-transparent floats was full, I mean full,
of fuel. ?These are the white floats. ?They should have been
changed. ?Except that, the carb had been overhauled in 2005. ?All
new parts. ?
Carb goes to Ken, at Lycon, in the morning.
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Message 2
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Other than the plane I worked on with a gear leg that had been splintered during
a really hard landing, I haven't seen a big problem with tire wear. ?I've got
a customer with a very low time Cheetah, previously owned by a flight instructor
(his personal plane), with a left tire that is wearing. ?
On my Citabria, there were angled shims. ?I'm assuming the Grummans have the same
setup. ?I haven't dug into it yet. ?
Any ideas?
Message 3
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| Subject: | Re: Float doesn't |
Oh, come on Gary, you are being way to practical!!
Cliff
----- Original Message -----
From: teamgrumman@aol.com
To: teamgrumman-list@matronics.com
Sent: Thursday, September 24, 2009 11:09 AM
Subject: Re: TeamGrumman-List: Float doesn't
Floats in carburetors have been around for over 100 years. It amazes me
how carbs in cars have managed to avoid recalls every couple of years to fi
x a problem with floats. Why not have Holley, Edelbrock, Carter or General
Motors build the floats=3F It's not like GM doesn't need the work.
-----Original Message-----
From: flyv35b <flyv35b@minetfiber.com>
To: teamgrumman-list@matronics.com
Sent: Sun, Sep 20, 2009 2:36 pm
Subject: Re: TeamGrumman-List: Float doesn't
Gary, after our phone conversation Friday about this, it doesn't surprise
me. The float was sinking, raising the fuel level and making it run very
rich. Probably could have diagnosed it by leaning the mixture manually unt
il it smoothed out and that would have told you it was to rich (20/20 hinds
ight, right=3F).
Cliff
----- Original Message -----
From: teamgrumman@aol.com
To: teamgrumman-list@matronics.com
Sent: Sunday, September 20, 2009 9:58 AM
Subject: TeamGrumman-List: Float doesn't
I had a customer called several weeks ago saying his engine felt 'weird
' on a landing, kind of like it wanted to stall. As he rolled out onto the
taxiway, the engine felt normal. We made an appointment to check it out,
and left it at that. The next few flights were about the same. He didn't
worry much about the engine.
A couple of weeks ago (oh, he never did come down to have it checked ou
t) he called saying it was worse.
Note: He has a Cheetah. Several years ago I had a customer with the s
ame symptoms with his Cheetah and it was the mixture needle working it's wa
y out.
I had him check the mixture screw and turn it in a 1/4 turn and said to
bring it in. He planned to bring it in but never did. The engine 'felt'
better.
Last week, he called saying it was getting a lot worse. He said it bar
ely ran at idle. He finally brought it in last Friday.
I looked for all of the basic stuff, leaks at the intake tubes, mixture
screw, looked for leaks on the carb . . . . nothing. We removed the cowli
ng and airbox. Several years ago, the accelerator nozzle in the carb on my
Cheetah had fallen out and was lying in the bottom of the airbox. I expec
ted to find something like that. Nothing. Venturi was tight, accelerator
nozzle was tight . . . nothing. I removed the carb.
I expected to find debris in the bottom of the carb. Nothing. Then I
noticed one of the semi-transparent floats was full, I mean full, of fuel.
These are the white floats. They should have been changed. Except that,
the carb had been overhauled in 2005. All new parts.
Carb goes to Ken, at Lycon, in the morning.
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Message 4
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In the AA-1 service manual it lists shims (PN 701068-1 through -3) to change the
toe-in / toe-out.....
Rich
-----Original Message-----
From: teamgrumman@AOL.COM
Sent: Thu, Sep 24, 2009 11:55 am
Subject: TeamGrumman-List: Tire wear
Other than the plane I worked on with a gear leg that had been splintered during
a really hard landing, I haven't seen a big problem with tire wear. ?I've got
a customer with a very low time Cheetah, previously owned by a flight instructor
(his personal plane), with a left tire that is wearing. ?
On my Citabria, there were angled shims. ?I'm assuming the Grummans have the same
setup. ?I haven't dug into it yet. ?
Any ideas?
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