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Old 12-03-2009, 08:46 PM   #1
Tintop
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Default TF125 Magneto Wiring

I have a CDI and a circuit diagram for the Suzuki TF125.

What I need to know is which wire connects to the magneto charging coil, and which wire connects to the trigger coil. The circuit diagram shows the wiring but does not differentiate between the charging and trigger circuits.

Reason is that I have a Tecumseh engine on my ride on mower and the CDI has failed. A nos CDI for the model costs nearly $900, (I can get a Chinese copy of a 12hp Honda engine for less than that) but I do have a couple of Suzuki CDI's

Thanks Ian F
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Old 12-04-2009, 09:45 AM   #2
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Nobody really knows.
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Old 12-04-2009, 11:37 AM   #3
seruzawa
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Connect it one way. If it doesn't work then switch the wires the other way.
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Old 12-04-2009, 11:56 AM   #4
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Cut the blue wire...no WAIT, cut the RED wire...
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Old 12-04-2009, 01:24 PM   #5
Tintop
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Quote:
Originally Posted by Kenneth_Moore View Post
Nobody really knows.
Is your answer on behalf of all members?
Just because you may not know does not mean that 'nobody' knows.

There is a possibility that someone somewhere has a stator plate sitting on a bench and is able and willing to trace the connecting wires to their respective coils and help me solve my problem.

Here's hoping.
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Old 12-04-2009, 01:33 PM   #6
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Quote:
Originally Posted by seruzawa View Post
Connect it one way. If it doesn't work then switch the wires the other way.
I thought of trying that, problem is that the charging coil produces quite a high AC voltage, where the trigger coil is just a low voltage pulse.

If I get it the wrong round the first time, it probably won't work the second try.
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Old 12-04-2009, 01:55 PM   #7
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Quote:
Originally Posted by Tintop View Post
I thought of trying that, problem is that the charging coil produces quite a high AC voltage, where the trigger coil is just a low voltage pulse.

If I get it the wrong round the first time, it probably won't work the second try.
Pull the coils out and see if you can trace the wires. You can use a VOM with very sharp probes to probe through the insulation without ruining it.
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Old 12-04-2009, 03:09 PM   #8
Tintop
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Sadly - all I have is a CDI (left over from repairs to a neighbours bike) and a Suzuki manual.

I was hoping that I would not have to borrow the bike back so I could pull it apart.

Ian F
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