We Need some help Carburetor for a C150.....

[gliderguynj]

The annual for our C150F unfortunately presented us with a curve
ball.... We've posted this on the C150-152 forum, and are cross
posting this here hoping someone has some ideas, a part or a lead for
us to follow....


MA3SPA 10-4894 carburetor

Our mechanic called today. While completing the annual inspection he
removed the inlet screen and upon reinstallation found that the
threads are damaged beyond use in the carburetor body. He suspects
that over time people have been turning it a bit tighter each year to
achieve proper alignment with the hose (rather than adjusting the
other connections) and it has thus stripped the threads.

It is my understanding so far from my phone calls that this cannot be
repaired. There apparently is no approved method to repair or replace
the threads.

I am also finding that the carburetor is apparently hard to find also.
The overhaul shops I have called so far have none in stock and can
only rebuild the one we have...but can't because of the thread issue. It
is probably worthless as a core because of the damage. Spruce has them
backordered as they have been waiting for months to receive their
order.

Anyone out there have any brilliant ideas? Is there potentially some
way we can repair this? Anyone have any suggested overhaul shops or
parts suppliers for me to call to try to find one we can buy? Anyone
have an extra one they may be willing to part with?

Thanks in advance for your advice.

Doug and the Somerset Flying Club...

[[email protected]]

On Apr 16, 8:02 am, gliderguynj > wrote:
> The annual for our C150F unfortunately presented us with a curve
> ball.... We've posted this on the C150-152 forum, and are cross
> posting this here hoping someone has some ideas, a part or a lead for
> us to follow....
>
> MA3SPA 10-4894 carburetor
>
> Our mechanic called today. While completing the annual inspection he
> removed the inlet screen and upon reinstallation found that the
> threads are damaged beyond use in the carburetor body. He suspects
> that over time people have been turning it a bit tighter each year to
> achieve proper alignment with the hose (rather than adjusting the
> other connections) and it has thus stripped the threads.
>
> It is my understanding so far from my phone calls that this cannot be
> repaired. There apparently is no approved method to repair or replace
> the threads.
>
> I am also finding that the carburetor is apparently hard to find also.
> The overhaul shops I have called so far have none in stock and can
> only rebuild the one we have...but can't because of the thread issue. It
> is probably worthless as a core because of the damage. Spruce has them
> backordered as they have been waiting for months to receive their
> order.
>
> Anyone out there have any brilliant ideas? Is there potentially some
> way we can repair this? Anyone have any suggested overhaul shops or
> parts suppliers for me to call to try to find one we can buy? Anyone
> have an extra one they may be willing to part with?
>
> Thanks in advance for your advice.
>
> Doug and the Somerset Flying Club...

Precision Aeromotive, the manufacturers of that carb, have
sold the division to Tempest. FAA certification for the new owners
will take at least until November, so meanwhile parts are scarce. I
can't even buy a maintenance manual. Disgusting. This is government-
mandated safety, delayed by government.
There might be a shop with the appropriate helicoil tooling
to fix that port. Helicoils are used on many other aircraft
applications, including sparkplug holes and crankcase studs. Check
around.
And when they put that carb back on, tell them to READ THE
CONTINENTAL MANUAL before doing so. There are special lock-o-seal
washers on the intake spider studs that mechanics will either leave
off, or will tighten the nuts way too far, so that the spider can't
flex. Engine vibration then shakes the daylights out of the carb and
sloshes fuel out the bowl vent into the carb throat and the engine
runs rough, especially on acceleration. You can spend months looking
for the problem.

Dan

Dan

[Peter Dohm]

> wrote in message
...
> On Apr 16, 8:02 am, gliderguynj > wrote:
>> The annual for our C150F unfortunately presented us with a curve
>> ball.... We've posted this on the C150-152 forum, and are cross
>> posting this here hoping someone has some ideas, a part or a lead for
>> us to follow....
>>
>> MA3SPA 10-4894 carburetor
>>
>> Our mechanic called today. While completing the annual inspection he
>> removed the inlet screen and upon reinstallation found that the
>> threads are damaged beyond use in the carburetor body. He suspects
>> that over time people have been turning it a bit tighter each year to
>> achieve proper alignment with the hose (rather than adjusting the
>> other connections) and it has thus stripped the threads.
>>
>> It is my understanding so far from my phone calls that this cannot be
>> repaired. There apparently is no approved method to repair or replace
>> the threads.
>>
>> I am also finding that the carburetor is apparently hard to find also.
>> The overhaul shops I have called so far have none in stock and can
>> only rebuild the one we have...but can't because of the thread issue. It
>> is probably worthless as a core because of the damage. Spruce has them
>> backordered as they have been waiting for months to receive their
>> order.
>>
>> Anyone out there have any brilliant ideas? Is there potentially some
>> way we can repair this? Anyone have any suggested overhaul shops or
>> parts suppliers for me to call to try to find one we can buy? Anyone
>> have an extra one they may be willing to part with?
>>
>> Thanks in advance for your advice.
>>
>> Doug and the Somerset Flying Club...
>
> Precision Aeromotive, the manufacturers of that carb, have
> sold the division to Tempest. FAA certification for the new owners
> will take at least until November, so meanwhile parts are scarce. I
> can't even buy a maintenance manual. Disgusting. This is government-
> mandated safety, delayed by government.
> There might be a shop with the appropriate helicoil tooling
> to fix that port. Helicoils are used on many other aircraft
> applications, including sparkplug holes and crankcase studs. Check
> around.
> And when they put that carb back on, tell them to READ THE
> CONTINENTAL MANUAL before doing so. There are special lock-o-seal
> washers on the intake spider studs that mechanics will either leave
> off, or will tighten the nuts way too far, so that the spider can't
> flex. Engine vibration then shakes the daylights out of the carb and
> sloshes fuel out the bowl vent into the carb throat and the engine
> runs rough, especially on acceleration. You can spend months looking
> for the problem.
>
> Dan
>
If it was on a homebuilt, I would be inclined to weld up the holes and then
just drill and tap tham again. On the 150, I just don't know and can only
suggest asking around. If there are any aircraft restorers in your area,
they may have a suggestion.

Peter

[Gig 601Xl Builder]

gliderguynj wrote:
> The annual for our C150F unfortunately presented us with a curve
> ball.... We've posted this on the C150-152 forum, and are cross
> posting this here hoping someone has some ideas, a part or a lead for
> us to follow....
>
>
> MA3SPA 10-4894 carburetor
>
> Our mechanic called today. While completing the annual inspection he
> removed the inlet screen and upon reinstallation found that the
> threads are damaged beyond use in the carburetor body. He suspects
> that over time people have been turning it a bit tighter each year to
> achieve proper alignment with the hose (rather than adjusting the
> other connections) and it has thus stripped the threads.
>
> It is my understanding so far from my phone calls that this cannot be
> repaired. There apparently is no approved method to repair or replace
> the threads.
>
> I am also finding that the carburetor is apparently hard to find also.
> The overhaul shops I have called so far have none in stock and can
> only rebuild the one we have...but can't because of the thread issue. It
> is probably worthless as a core because of the damage. Spruce has them
> backordered as they have been waiting for months to receive their
> order.
>
> Anyone out there have any brilliant ideas? Is there potentially some
> way we can repair this? Anyone have any suggested overhaul shops or
> parts suppliers for me to call to try to find one we can buy? Anyone
> have an extra one they may be willing to part with?
>
> Thanks in advance for your advice.
>
> Doug and the Somerset Flying Club...


Call or e-mail this guy.

D & G Supply/Ducarra Aviation

Tel 269-684-4440/800-446-8160
FAX 269-684-8375

I just bought an overhauled one from him for $900. $400 of that was core
charge.

[NW_Pilot]

Yea, the carbs I belive will be Orphined

You may want to spend some money and switch it over to fuel injection.... I
will be working with local DER and DAR for a field approval on my buck fifty
if i decide to keep it.

http://www.ellison-fluid-systems.com/injectors.htm

[gliderguynj]

Thank you all for the suggestions and help. We have contacted D&G and
our carb is being sent overnight as I type. When this is all
finished, we will be posting all the information we've been given in a
summary so that in the future this will be available to any other
pilots that find themselves in the same situation.

The response we've gotten on this forum and on the C150-152 forum was
overwhelming. Once again the aviation community has shown it's true
colors. Thank you all.

Regards,

Doug and the Somerset Flying Club

[Robert M. Gary]

On Apr 16, 4:31*pm, "NW_Pilot" <service(Spam)@aircraft"nospam"-me-
ok-"spamer"delivery.net> wrote:
> Yea, the carbs I belive will be Orphined
>
> You may want to spend some money and switch it over to fuel injection.... I
> will be working with local DER and DAR for a field approval on my buck fifty
> if i decide to keep it.
>
> http://www.ellison-fluid-systems.com/injectors.htm

As someone who has had an injector plug up, the concept of a single,
throttle body injector would make me pretty nervious. At least with a
port injection you have 5 or 6 cylinders taking you to the crash site.

-Robett

[Mike Isaksen]

"Robert M. Gary" wrote ...

>On Apr 16, 4:31 pm, "NW_Pilot" wrote:
>> http://www.ellison-fluid-systems.com/injectors.htm

>As someone who has had an injector plug up, the concept of a single,
>throttle body injector would make me pretty nervious. At least with a
>port injection you have 5 or 6 cylinders taking you to the crash site.

I never really thought of these Ellison guys as throttle body "injectors".
More like a Weeping pipe in the airflow. Kinda like the TKS weeping wing,
but not. The pipe rotates 90 degrees and when the holes are facing the
airflow the fuel can't get out. Use the mixture knob to rotate the pipe and
the tiny bit of fuel pressure and the airflow not blasting into the holes
allows the fuel to mist out. Instead of a throttle plate they use a
guillotine type metal slide plate to reduce the throat opening. Weird
design.