Crack in Carb Throat on OS 46 FX

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Ted - 12 Sep 2008 18:23 GMT

I had a crash and and upon inspction I found a small crack at the top
of the carb srew mounting hole. The crack extends from the 12 o'clock
position at the top of the screw hole to the top of the carb stem
(about an eighth inch). It is completely thru the stem wall. Is it
junk or will it still run reasonably well?

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Martin X. Moleski, SJ - 12 Sep 2008 19:46 GMT

>I had a crash and and upon inspction I found a small crack at the top
>of the carb srew mounting hole. The crack extends from the 12 o'clock
>position at the top of the screw hole to the top of the carb stem
>(about an eighth inch). It is completely thru the stem wall. Is it
>junk or will it still run reasonably well?

If the carb will stay securely mounted where it
belongs, give the engine a test run.

I'm betting it will run OK.

You could seal the crack with JB weld. If it
really is small crack, it should hold up OK.

Marty

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Morgans - 12 Sep 2008 22:52 GMT

> If the carb will stay securely mounted where it
> belongs, give the engine a test run.
[quoted text clipped - 3 lines]
> You could seal the crack with JB weld. If it
> really is small crack, it should hold up OK.

I strongly second the JB Weld recommendation. Clean it super clean with
acetone, and then put a big blob of JB Weld on it, and squeeze it into the
crack, and some extra over the top of the crack, and onto the surrounding
metal. You might need to tap the hole again, but that will be a good thing,
to tighten up the set screw in the hole, so it does not vibrate loose.

My bet is the crack will outlast the engine, with a good blob on it.

JB Weld ranks right above sliced bread when it comes to fixing engines,
IMHO. <g>

I have no affiliation with JB Weld, ....bla - bla - bla, ect.

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Jim in NC

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fubar1 - 12 Sep 2008 23:22 GMT

So...
Explain how you fix engines with a slice of bread.
I third the JB Weld and I would rough up the area around the crack just a
bit.

Dan
KE6ERB
AMA605992
Fubar, Etc.

>> If the carb will stay securely mounted where it
>> belongs, give the engine a test run.
[quoted text clipped - 17 lines]
>
> I have no affiliation with JB Weld, ....bla - bla - bla, ect.

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Martin X. Moleski, SJ - 13 Sep 2008 00:16 GMT

>My bet is the crack will outlast the engine, with a good blob on it.

Agreed.

>JB Weld ranks right above sliced bread when it comes to fixing engines,
>IMHO. <g>

Yup.

I JB-welded a broken carb into a broken crankcase of
a Thunder Tiger .36 about five or six years ago.

It's still flying.

>I have no affiliation with JB Weld, ....bla - bla - bla, ect.

Me neither--worse the luck!

Marty

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Ted - 14 Sep 2008 02:41 GMT

On Sep 12, 4:16 pm, "Martin X. Moleski, SJ" <mole...@canisius.edu>
wrote:

> >My bet is the crack will outlast the engine, with a good blob on it.
>
[quoted text clipped - 18 lines]
> Big-8 newsgroups: humanities.*, misc.*, news.*, rec.*, sci.*, soc.*, talk.*
> Seehttp://www.big-8.orgfor info on how to add or remove newsgroups.

Thanks Guys, looks like the majority says JB Weld, So be it. Watch
this sapce......................

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Model Forum / Radio Controlled / Air Models / September 2008

Crack in Carb Throat on OS 46 FX