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Author Topic: BT-50 Gage for 51 Points  (Read 3710 times)

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Offline OilyRascal

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BT-50 Gage for 51 Points
« on: January 11, 2013, 07:11:32 PM »
I have this tool I'm seeking information on.  It is marked "BT-50 GAGE FOR 51 POINTS" with "221" and "059" also stamped.  It measures 4" long.  It was found among "Carter" carb. tools, but is not marked with a maker.  Any information is appreciated.



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Offline john k

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Re: BT-50 Gage for 51 Points
« Reply #1 on: January 11, 2013, 07:15:11 PM »
The marking 51 points to me indicates it is for setting ignition points in the distributor.  The wire is what diameter ?    Looking at it closer it says for '51 Pontiac Six.   
« Last Edit: January 11, 2013, 07:17:50 PM by john k »
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Offline lauver

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Re: BT-50 Gage for 51 Points
« Reply #2 on: January 11, 2013, 07:24:38 PM »
Quote from: john k on January 11, 2013, 07:15:11 PM
The marking 51 points to me indicates it is for setting ignition points in the distributor.  The wire is what diameter ?    Looking at it closer it says for '51 Pontiac Six.

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Offline Papaw

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Re: BT-50 Gage for 51 Points
« Reply #3 on: January 11, 2013, 07:27:49 PM »
Yep, it says 51 PONT- Pontiac

If it is a carb tool, which Carter suggests, it might be for float setting or such.
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Offline krusty the clown

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Re: BT-50 Gage for 51 Points
« Reply #4 on: January 11, 2013, 07:48:42 PM »
Choke unloader guage?  I used to use drll bits.
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Offline Papaw

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Re: BT-50 Gage for 51 Points
« Reply #5 on: January 11, 2013, 08:34:45 PM »
Quote
Choke unloader guage
<---- Yes. I just couldn't think of it before- been many years.
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Offline OilyRascal

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Re: BT-50 Gage for 51 Points
« Reply #6 on: January 12, 2013, 05:18:26 AM »
Many thanks for the assistance!

Is there a simple explanation for what it means to "Unload" a choke?
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Offline krusty the clown

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Re: BT-50 Gage for 51 Points
« Reply #7 on: January 12, 2013, 05:45:04 AM »
Quote from: OilyRascal on January 12, 2013, 05:18:26 AM
Many thanks for the assistance!

Is there a simple explanation for what it means to "Unload" a choke?
it's how far the choke plate opens when the vacuum pull-off pulls it open when the engine starts cold (other wise it would stall). Also the choke is mechanicly opened at WOT to clear floods. Both must be adjusted to a spec. Before we stopped using carbs the specs were changed  to degrees of open but before that it was measure in thousands of an inch between the choke plate and the housing.
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Offline krusty the clown

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Re: BT-50 Gage for 51 Points
« Reply #8 on: January 12, 2013, 05:51:22 AM »
I forgot to mention that the BT prefix indicates that its a burroughs tool. Burroughs made GM Special tools as well as parts dept shelving and service writers desks. They are still in business.but no longer making tools.
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Offline Ken W.

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Re: BT-50 Gage for 51 Points
« Reply #9 on: January 12, 2013, 11:08:14 AM »
That looks very similar to the Tecumseh carb tool for setting the float and replacing the seat.
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Offline Lostmind

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Re: BT-50 Gage for 51 Points
« Reply #10 on: January 12, 2013, 11:41:30 AM »
How about  .221 and .059   being the sizes?
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Offline amertrac

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Re: BT-50 Gage for 51 Points
« Reply #11 on: January 12, 2013, 12:10:45 PM »
I worked for pontiac 1952 t0 1963  and used that tool many times and you got the right answer here    bob w.
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Offline OilyRascal

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Re: BT-50 Gage for 51 Points
« Reply #12 on: January 12, 2013, 01:51:04 PM »
Thanks again!  Appreciate all the information.
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