No Crank out of no where

ceylonfj40nut

Waiting for Barn Time
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I would check loose terminals and main ground. Can’t recall if you have fusible links or not, but would check those if you do.

Disconnect main coil wire to dizzy. Apply power direct to starter to see if it bumps motor. This will help isolate where the issue is.
 
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I would check loose terminals and main ground. Can’t recall if you have fusible links or not, but would check those if you do.

Disconnect main coil wire to dizzy. Apply power direct to starter to see if it bumps motor. This will help isolate where the issue is.
I checked the fusible link and took it apart completely. Everything looks fine. Still same issue.

I will try the starter item
 
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Finally put in the new fusible link that came in today. Still having the same issue. Any other ideas? I’m at a loss at this moment.
 
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Pull the small wire off the starter; check voltage while cranking.

Small wire should get system voltage when you hit the key.

Is the 80a fuse you changed still live?

Any other issues? I.e do you have full instrument and dash power when turn the key on?
 
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Pull the small wire off the starter; check voltage while cranking.

Small wire should get system voltage when you hit the key.

Is the 80a fuse you changed still live?

Any other issues? I.e do you have full instrument and dash power when turn the key on?
I’ll check the small wire shortly

All other items are great. Vehicle literally ran like a top. Which is why I am completely lost.
 
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Small
Pull the small wire off the starter; check voltage while cranking.

Small wire should get system voltage when you hit the key.

Is the 80a fuse you changed still live?

Any other issues? I.e do you have full instrument and dash power when turn the key on?
small wire has voltage.
 
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Unless the "12 volts" is actually a dead battery.

How many volts on the batt? 12.6 is fully charged. 12.0 is considered as good as dead...25% charge.
 
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I have about 12.7 at the battery.

I’ll pull the new starter back off and bench test it. Probably should have done that before anyways
 
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Id say you have already bench tested it in frame by verifying the voltage. But if its no good it has to come out anyways.

Try not to be rough with it. Dropping it or bouncing it off the frame rail can be enough to demagnatize a motor. Or remagnatize it/bounce the contacts around. Which is why hitting a starter with a hammer sometimes makes it go.
 

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