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Old 01-26-2020, 11:40 AM   #1
Merc Cruzer
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Default Distribator off by one tooth - Pulley casting number

What application, Ford or Mercury, would this pulley, with the casting number B 16, be for?
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File Type: jpg DSCN0002.jpg (53.7 KB, 36 views)
File Type: jpg DSCN0003.jpg (30.3 KB, 32 views)
File Type: jpg DSCN0004.jpg (32.1 KB, 40 views)

Last edited by Merc Cruzer; 01-28-2020 at 05:55 AM. Reason: Correct title
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Old 01-26-2020, 12:19 PM   #2
tubman
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Default Re: Pulley casting number

"B 16" looks more like a date code than a casting number to me. I'll take a SWAG and say narrow belt 8BA.
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Old 01-26-2020, 03:43 PM   #3
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Default Re: Pulley casting number

I'm holding a '53 Merc pulley right now that looks same as yours. 3/8" belts, closest sheave to rear of engine 6 1/8" dia. and smaller is 5 1/4". Center of large sheave is 2.0" from rear of hub,smaller is 3/4" forward of that.


No numbers at all on mine.


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Old 01-26-2020, 04:58 PM   #4
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Default Re: Pulley casting number

I have an 8BA pulley that looks similar to that shown except it has 3 reinforcing webs on the backside. One web is on each spoke. Both are narrow belt pulleys. Large pulley is 6 in. dia. Smaller pulley is 5 and 1/4. Each measurement was taken at front of each sheave. Crank hole is a tiny bit less than 1 5/16.
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Old 01-26-2020, 08:11 PM   #5
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Default Re: Pulley casting number

On mine the closest sheave to rear of engine 6 1/8" dia. too. I am not finding Ford and Mercury pulleys with part number cast in to them.

If you draw a line directly up from the keyway to the top of the pulley, the timing "button" appears top be 1" to the right of the top of the line.

19F0rdy & cadillac512: Is that the same on yours?
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Old 01-26-2020, 10:36 PM   #6
51 MERC-CT
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Default Re: Pulley casting number

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Quote:
Originally Posted by Merc Cruzer View Post
On mine the closest sheave to rear of engine 6 1/8" dia. too. I am not finding Ford and Mercury pulleys with part number cast in to them.

If you draw a line directly up from the keyway to the top of the pulley, the timing "button" appears top be 1" to the right of the top of the line.

19F0rdy & cadillac512: Is that the same on yours?
I had previously posted a version of this ('50-'51) pulley on your first inquiry.

I can't see where other than an 8RT or 6cyl pulley there would be any functional difference in '50-'53 Ford or Mercury.
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File Type: jpg B.jpg (52.6 KB, 294 views)
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Old 01-27-2020, 10:20 AM   #7
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Default Re: Pulley casting number

Quote:
Originally Posted by 51 MERC-CT View Post
I had previously posted a version of this ('50-'51) pulley on your first inquiry.

I can't see where other than an 8RT or 6cyl pulley there would be any functional difference in '50-'53 Ford or Mercury.
Thank you, I appreciate your input, as I continue to look for an anomaly that might offer an explanation.

Last edited by Merc Cruzer; 01-27-2020 at 10:26 AM.
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Old 01-27-2020, 11:24 AM   #8
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Default Re: Pulley casting number

Which pulley are we working with? You said you replaced a 2belt with a 3belt. Which one are you having the timing dot problem with?

You are showing us the 2belt.

If it's the 3belt on the car, remove, inspect and measure that one.
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Old 01-27-2020, 11:35 AM   #9
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Default Re: Pulley casting number

I suspect that the distributor is not correctly aligned with the drive gear.
With the #1 piston top dead center and pointer on the dot.
The rotor should be in line with the #1 position on the dist.cap
If it is not then pull out the dist. far enough to rotate to the next gear location that will put the rotor closest to the correct position on the cap when touching the clamp pad, then lock in place.

Disregard any previously installed markings on the clamp pad.
From this point the timing should be able to be set.
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Old 01-27-2020, 01:41 PM   #10
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Default Re: Pulley casting number

Quote:
Originally Posted by 51 MERC-CT View Post
I suspect that the distributor is not correctly aligned with the drive gear.
With the #1 piston top dead center and pointer on the dot.
The rotor should be in line with the #1 position on the dist.cap
If it is not then pull out the dist. far enough to rotate to the next gear location that will put the rotor closest to the correct position on the cap when touching the clamp pad, then lock in place.

Disregard any previously installed markings on the clamp pad.
From this point the timing should be able to be set.
I was only able to confirm the TDC with the finger test. Finger in the plug hole and turn over the engine until it blows the finger out of the hole. Then line up the dot with the pointer. Cap on the distributor, pointer to #1 plug, pointer showing rotor position with cap off. I think this will confirm the one tooth off explanation. Looks like rotate one tooth counterclockwise?
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File Type: jpg DSCN0006.jpg (65.7 KB, 30 views)
File Type: jpg DSCN0005.jpg (78.4 KB, 31 views)
File Type: jpg DSCN0001.jpg (74.2 KB, 31 views)
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Old 01-26-2020, 11:57 PM   #11
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Default Re: Pulley casting number

Quote:
Originally Posted by Merc Cruzer View Post
On mine the closest sheave to rear of engine 6 1/8" dia. too. I am not finding Ford and Mercury pulleys with part number cast in to them.

If you draw a line directly up from the keyway to the top of the pulley, the timing "button" appears top be 1" to the right of the top of the line.

19F0rdy & cadillac512: Is that the same on yours?

Yes, same as mine.



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Old 01-27-2020, 12:26 PM   #12
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Default Re: Pulley casting number

Here's some photos showing my 8BA pulley agrees with your pulley re: 1 inch measurement. If there were any casting marks or part # I think they may have been drilled out during balancing process. I couldn't find any ID marks on the pulley. It is a casting.
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File Type: jpg IMG_5592b.jpg (34.3 KB, 22 views)
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File Type: jpg IMG_5589b.jpg (52.0 KB, 19 views)
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File Type: jpg IMG_5587b.jpg (55.3 KB, 20 views)
File Type: jpg IMG_5586b.jpg (50.9 KB, 22 views)
File Type: jpg IMG_5585b.jpg (54.6 KB, 21 views)
File Type: jpg IMG_5584b.jpg (43.1 KB, 22 views)
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Old 01-27-2020, 01:33 PM   #13
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Default Re: Pulley casting number

"I suspect that the distributor is not correctly aligned with the drive gear.
With the #1 piston top dead center and pointer on the dot."

51 Merc, he established TDC using the cable tie method. When the piston is at TDC the pointer does not point to the dot.

That's the problem.

It has nothing to do with the distributor or the ignition timing. That dot is never going to be TDC.

How many times per crankshaft revolution does a spark occur? ... for a V8? ... for a 6? How many degrees apart for the V8? How many for the 6?

Inspect the slot ... measure the dot. (On the one with the problem.) Then go from there.
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Old 01-27-2020, 04:30 PM   #14
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Default Re: Pulley casting number

This is what one tooth, counter clockwise, looks like:
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Old 01-27-2020, 04:42 PM   #15
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Default Re: Pulley casting number

Quote:
Originally Posted by Merc Cruzer View Post
This is what one tooth, counter clockwise, looks like:
Looks OK, now rotate the distributor (CCW) to bring the rotor to where it will be in alignment with the cap #1 position. lock it down and start it up.
Should be good to go for timing adjustment.
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Old 01-28-2020, 08:39 AM   #16
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Default Re: Pulley casting number

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Originally Posted by 51 MERC-CT View Post
Looks OK, now rotate the distributor (CCW) to bring the rotor to where it will be in alignment with the cap #1 position. lock it down and start it up.
Should be good to go for timing adjustment.
One final issue: I moved the rotor one tooth counter clockwise, as pictured yesterday. Took the vacuum line off the vacuum advance pod, plunged it and then set the timing. Everything is good and the timing is right on, using the timing button and the pointer.

The issue is that in order to get the timing correct, the vacuum pod is literally pushed into the thermostat housing, and will not allow any further rotation/ advance adjustment. Have you seen this previously?
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Old 01-28-2020, 09:21 AM   #17
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Default Re: Pulley casting number

Quote:
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One final issue: I moved the rotor one tooth counter clockwise, as pictured yesterday. Took the vacuum line off the vacuum advance pod, plunged it and then set the timing. Everything is good and the timing is right on, using the timing button and the pointer.

The issue is that in order to get the timing correct, the vacuum pod is literally pushed into the thermostat housing, and will not allow any further rotation/ advance adjustment. Have you seen this previously?

Yes, had the same situation.

You can rotate the distributor and rotor 1 tooth clock wise, remembering to keep the rotor at the same #1 cap location.
This moves the distributor about 32 .72° or 1 inch at the cap O.D.
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Old 01-27-2020, 06:10 PM   #18
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Default Re: Pulley casting number

Just a thought. You might want to consider replacing the
distributor hold down bolt with a stud to save wear and tear on the threads.
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Old 01-27-2020, 08:23 PM   #19
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Default Re: Pulley casting number

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Just a thought. You might want to consider replacing the
distributor hold down bolt with a stud to save wear and tear on the threads.
Thanks for the suggestion, but once I get this right, believe me, I have no intention of touching it again!
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Old 01-27-2020, 09:13 PM   #20
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Default Re: Pulley casting number

Don't worry. After this learning lesson you will be an expert on installing and setting your distributor. Now, you can remove it and reinstall it again without anxiety. Good job.
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