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Hh120 Spark One Day Gone The Next


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#1 redb4 OFFLINE  

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Posted May 26, 2013 - 03:36 PM

My SS12 ran great the last time I used it, now no spark.

It has the Solid State ignition 1969 version, no alternator.

 

-I disconnected the wire from the ign switch, no spark

-had a look under the fly wheel.  The wire going to the pulse transformer had been rubbing on the flywheel magnet and the insulation was worn though.

-It appears the magnet on the inside of the fly wheel may be coming into contact with the trigger pins of the trigger coil.

 

I'm at a loss on how the test, and or adjust any of this stuff.

 

Any and all help will be appreciated.

 

Thanks 



#2 JDBrian OFFLINE  

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Posted May 26, 2013 - 04:28 PM

Don't know much bout those systems but someone who's already wrestled with that problem should be along soon to help. Check the magnets to make sure they are firmly attached to the flywheel. It seems odd that they would come into contact with the pin. I've never owned one of those engines so can't give much advice. 



#3 redb4 OFFLINE  

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Posted May 26, 2013 - 05:02 PM

Hey all, in my search for answers, I came across this site...  http://home.earthlin...ller/index.html

Good stuff about ignitions.


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#4 HDWildBill OFFLINE  

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Posted May 26, 2013 - 05:53 PM

Did you get your problem fixed?



#5 MH81 ONLINE  

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Posted May 26, 2013 - 08:07 PM

First, make sure the pin in the bottom of the CDI is secure and straight. I had one that was moving after coming in contact with the pins.
Be sure to gap the CDI to the pins.

Next attempt to do the tickle test mentioned on the page above... It's not as bad as it sounds.

#6 TAHOE OFFLINE  

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Posted May 26, 2013 - 10:03 PM

 

-It appears the magnet on the inside of the fly wheel may be coming into contact with the trigger pins of the trigger coil.

 

 

I don't understand that statement. I've dealt with the SSI system extensively on my OH160, but I know they have multiply flywheel magnets and multiple charge "fingers", yours maybe different as it's an earlier model. Not sure of how the magnet could hit the trigger pins.

Ed's website is a wealth of info, I've learned a lot from it and sending him emails.

Pics would be great if you can provide them.



#7 MH81 ONLINE  

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Posted May 26, 2013 - 10:40 PM

I don't understand that statement. I've dealt with the SSI system extensively on my OH160, but I know they have multiply flywheel magnets and multiple charge "fingers", yours maybe different as it's an earlier model. Not sure of how the magnet could hit the trigger pins.

Pics would be great if you can provide them.


Tahoe, I read that as the pin was hitting the pickup on the CDI as that's what he should have.
No magnets inside the flywheel are within a country mile of the trigger pins if my feeble memory is correct.

I wonder if red is dealing with the charge pickups? Also, I thought the tolerances under the flywheel were more or less limited so stuff like this couldn't happen... Oh, unless the crank has some slop...

Red, is there any major play in the crank?

#8 redb4 OFFLINE  

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Posted May 27, 2013 - 07:44 AM

Thinking that the bared wire was my problem, I put it back together.  I did not take any pictures, but here is one I found on ebay  

 

Im not sure when I will be able to work on it again, the weather guy says rain all week.

 

Thanks for the help

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#9 MH81 ONLINE  

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Posted May 27, 2013 - 10:07 AM

You have that style on a 69?
Must've been the very first one. :D

The pickup is based on the magnets inside. No pins.

Thanks for the pic, it clarified things.

#10 redb4 OFFLINE  

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Posted May 27, 2013 - 06:26 PM

You have that style on a 69?
Must've been the very first one. :D

The pickup is based on the magnets inside. No pins.

Thanks for the pic, it clarified things.

I'm saying 1969 because I think that is the year of my SS12.  Model 917.25510  engine 143.592022.  Am I wrong about that?



#11 redb4 OFFLINE  

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Posted May 27, 2013 - 07:41 PM

According to the Sears site, my engine,143.592022 should have SSI # 610759  From what I can find, that does look like the one I have.  Perhaps the engine is not the original?  That would not surprise me. 



#12 TAHOE OFFLINE  

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Posted May 28, 2013 - 09:24 AM

AAAHHHHH, that is the early CDI systems when they switched from the points over to a solid state system. I've never dealt with those before so I won't be of much help. It maybe original as those were first systems I think they used before going to outside flywheel triggers and that was in 67-68. You maybe able to email Ed on his website and ask him the questions you need.

 

Shoot us the serial number on your motor, then we can date it.



#13 redb4 OFFLINE  

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Posted May 28, 2013 - 06:28 PM

AAAHHHHH, that is the early CDI systems when they switched from the points over to a solid state system. I've never dealt with those before so I won't be of much help. It maybe original as those were first systems I think they used before going to outside flywheel triggers and that was in 67-68. You maybe able to email Ed on his website and ask him the questions you need.

 

Shoot us the serial number on your motor, then we can date it.

Engine # 9052.  It's not raining right now.  With luck I will have more info about my lack of spark.


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#14 redb4 OFFLINE  

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Posted May 28, 2013 - 09:05 PM

Using the info from http://home.earthlin...ller/index.html  it would appear my pulse transformer is NG.  Wanted spark plug wire to ground resistance is 4000 to 7000 Ohms, mine 2780.  I'm not sure that I had my multimeter set right, but electricity is measured in metric.  No way 2780 falls in between 4000 and 7000 no matter what the scale.

 

If my logic is flawed please let me know.  If not, do any of you have a pulse transformer for sale?



#15 MH81 ONLINE  

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Posted May 28, 2013 - 09:13 PM

Red,
Sorry to hear it.

Wish I had an extra, you might check with the site sponsors.
If they dont, those ones usually go for a little less $ on eBay




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