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Timing a 22?

Timing a 22?

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22Randy
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I'm using a timing light to check the timing on my tractor with the engine running and it is firing about 10 degrees after the mag mark. My operators manual describes the adjustment for an Eisemann mag but I have an American Bosch unit and just want to make sure that I'm doing this right. It looks like I need to release the locking tab and back off the lock nut and then I can turn the drive hub a bit to change the timing. Am I on the right track here?
Thanks,
Randy


[img]http://i736.photobucket.com/albums/xx1/Randy4321/PA270002.jpg[/img]
Cat 22
Serial# 2F237
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Wed, Jul 27, 2011 4:46 AM
Norm R2,22
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You will have to see how the setup you have is adjusted, however the setting is the same for most mag ignitions. The impulse should trip as you bring the engine over top dead center. If it trips early it will pull the crank out of you hand if you try to start it. That's how some people end up with broken arms. If it trips late the engine tend to heat up and won't run well at WOT. Do the timing with the ignition off. Pull the engine through with the crank SLOWLY until the impulse trips. The TDC mark should be lined up. If not adjust accordingly. This works for most everything from AC to Rumley.
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Wed, Jul 27, 2011 9:41 AM
lil cat mec
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Reply to Norm R2,22:
You will have to see how the setup you have is adjusted, however the setting is the same for most mag ignitions. The impulse should trip as you bring the engine over top dead center. If it trips early it will pull the crank out of you hand if you try to start it. That's how some people end up with broken arms. If it trips late the engine tend to heat up and won't run well at WOT. Do the timing with the ignition off. Pull the engine through with the crank SLOWLY until the impulse trips. The TDC mark should be lined up. If not adjust accordingly. This works for most everything from AC to Rumley.
i have an additional peice in between my Mag and the rod that connects to the mag... is that normal?
1935 CAT 22 2f4455W
CAT 951
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Wed, Jul 27, 2011 12:14 PM
edb
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Reply to lil cat mec:
i have an additional peice in between my Mag and the rod that connects to the mag... is that normal?
Hi LCM,
yes, the fiber drive block is standard. It is just that 22Randy has it removed for the picture. His drive tangs are orientated about where they would be if the block was installed.

Hi 22Randy,
I have not seen that type of drive before, but, that does not mean it is not correct and by the look of the holes in the plate with the lock tabbed nut I would say that the device would vernier around a hole at a time to adjust the timing setting.
Cheers,
Eddie B.
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Wed, Jul 27, 2011 4:16 PM
22Randy
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Reply to edb:
Hi LCM,
yes, the fiber drive block is standard. It is just that 22Randy has it removed for the picture. His drive tangs are orientated about where they would be if the block was installed.

Hi 22Randy,
I have not seen that type of drive before, but, that does not mean it is not correct and by the look of the holes in the plate with the lock tabbed nut I would say that the device would vernier around a hole at a time to adjust the timing setting.
Cheers,
Eddie B.
Thanks for the suggestions guys, I used a magic marker for a reference on the hub and went ahead and removed the nut. I thought that the drive hub was threaded but it turned out to be a taper lock fit and it can be adjusted as little or much as needed. I moved it a little bit and put it back together and checked it again but it was too far advanced so I had to back it off just a hair to get it right on.

[img]http://i736.photobucket.com/albums/xx1/Randy4321/PA280001-1.jpg[/img]

[img]http://i736.photobucket.com/albums/xx1/Randy4321/PA280003.jpg[/img]
Cat 22
Serial# 2F237
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Thu, Jul 28, 2011 3:10 AM
edb
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Reply to 22Randy:
Thanks for the suggestions guys, I used a magic marker for a reference on the hub and went ahead and removed the nut. I thought that the drive hub was threaded but it turned out to be a taper lock fit and it can be adjusted as little or much as needed. I moved it a little bit and put it back together and checked it again but it was too far advanced so I had to back it off just a hair to get it right on.

[img]http://i736.photobucket.com/albums/xx1/Randy4321/PA280001-1.jpg[/img]

[img]http://i736.photobucket.com/albums/xx1/Randy4321/PA280003.jpg[/img]
Hi 22Randy,
thank you very much for the great pix of the coupling and its adjustment method.
These have been stored for future reference.
Cheers,
Eddie B.
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Thu, Jul 28, 2011 9:03 AM
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