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  #1  
Old 08-02-2012, 11:04 PM
Cub 128 Cub 128 is offline
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Default Weak battery? No spark?
I've charged the battery up and it turns the engine over fine, but I get no spark or volts on the negative post on the coil. Could this be caused by a weak battery on this 128?

Ive replaced the V/R, coil, condenser, solenoid, new wire harness.

It had spark last week but the coil was going bad so I replaced it now no spark.

The battery is 3 years old
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  #2  
Old 08-03-2012, 12:54 AM
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SumBum SumBum is offline
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Do you have power on the + side of coil with the key turned on?

Can you see spark at the points?
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  #3  
Old 08-03-2012, 06:34 AM
R Bedell R Bedell is offline
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A low voltage battery can cause a no or weak spark. BTDT.

Click on this link and with a DVM or VOM, you can trace the issue down....... Diagram
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Old 08-03-2012, 07:13 AM
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I am no expert but could there be a problem with your ignition switch? That is about the only thing you did not replace.
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Old 08-03-2012, 11:57 AM
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red56turbo red56turbo is offline
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Quote:
Originally Posted by PaulS View Post
I am no expert but could there be a problem with your ignition switch? That is about the only thing you did not replace.
Great point Paul. Kinda what I was thinking. Looks like the points weren't replaced yet either. Maybe a quick clean with some emery cloth would help.
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  #6  
Old 08-03-2012, 12:32 PM
Cub 128 Cub 128 is offline
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I have a new set of points laying around, ill replace them today.

Ignition switch was replaced with one off of another cub but its still could be bad.

12v power is going to the positive post on the coil.
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  #7  
Old 08-03-2012, 04:50 PM
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Originally Posted by Cub 128 View Post

It had spark last week but the coil was going bad so I replaced it now no spark.
You sure you got the coil back in right? I'd check the simple things first.

Are the points opening and closing? I'd change pr adjust as few additional things as possible before checking all the basics.

How did you determine the coil was "going bad" ... spark beginning to fail?

John
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Old 08-03-2012, 05:00 PM
Cub 128 Cub 128 is offline
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Originally Posted by jbrewer View Post
You sure you got the coil back in right? I'd check the simple things first.

Are the points opening and closing? I'd change pr adjust as few additional things as possible before checking all the basics.

How did you determine the coil was "going bad" ... spark beginning to fail?

John
I heard that if the coil got really hot when it was running that it was going bad, And it was getting pretty hot.
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Old 08-03-2012, 05:05 PM
R Bedell R Bedell is offline
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I heard that if the coil got really hot when it was running that it was going bad, And it was getting pretty hot.
Now wait a minute...........there was NOTHING said in the original post about the Ignition Coil being "hot". Are you saying now.......that the coil has been running hot....???
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