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Testing B & S 6 1/2 H P Coil.


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#1 Texas Deere and Horse OFFLINE  

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Posted March 25, 2014 - 02:46 PM

Went to start the pressure washer today and first had to re build the Carb. Got that done and see I'm not getting any spark out of the Mag/Coil. Cleaned the mounting surfaces along with the Flywheel magnet and coil pick up area, still no spark, checked to make sure the kill wire wasn't the issue and even removed it from the coil and also inspected the plug wire and found marks or breaks. 

 

My question is, is there any way to check the Mag/Coil with a Multi-Meter? If so, what readings should I see?

 

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#2 boyscout862 ONLINE  

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Posted March 25, 2014 - 03:26 PM

Brian, I think there are specs for testing in the B&S Repairmans Manual(in our Manuals section). Test the resistance between the mag and the block first, it must be zero. Good Luck, Rick


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#3 olcowhand ONLINE  

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Posted March 25, 2014 - 03:52 PM

With what you've already done Brian, I'd say the coil is done.


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#4 JDBrian OFFLINE  

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Posted March 25, 2014 - 05:03 PM

You should be able to measure a fairly high resistance, maybe 1k to 10k ohms at a guess,  from the plug lead to the chassis if it's just a simple coil. The chassis end of the coil needs to have a good connection in order to make a circuit when the plug fires. 


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#5 superaben OFFLINE  

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Posted March 25, 2014 - 05:34 PM

Brian, assuming this is a magnetron/solid state coil (no breakers and condenser) I'd say it's not worth your time to check.  Once you have the ground wire removed, if you have no spark with a known good spark plug, then you need a coil.  Nothing you can do to repair it.

 

Ben W.


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#6 New.Canadian.DB.Owner ONLINE  

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Posted March 25, 2014 - 07:29 PM

Did you clean the mounting points for, and on, the coil?  I think they use a frame ground.

 

Coil mounting points.jpg


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#7 Texas Deere and Horse OFFLINE  

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Posted March 25, 2014 - 08:22 PM

Did you clean the mounting points for, and on, the coil?  I think they use a frame ground.
 
attachicon.gifCoil mounting points.jpg


Yes, I made sure that both the mount points and the coil were clean.
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#8 IamSherwood OFFLINE  

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Posted March 25, 2014 - 08:52 PM

You inspected the plug lead, visually. Did you check continuity on it?


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#9 Texas Deere and Horse OFFLINE  

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Posted March 25, 2014 - 09:18 PM

Where do you check it on the coil end of the wire, it goes into the epoxy ahead of the solder joint.



#10 IamSherwood OFFLINE  

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Posted March 25, 2014 - 09:33 PM

Ah, right. I had my blinders on, and was thinking about Kohler K series coils.



#11 JDBrian OFFLINE  

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Posted March 26, 2014 - 05:57 AM

Where do you check it on the coil end of the wire, it goes into the epoxy ahead of the solder joint.

I think it has to go to the chassis connection Brian otherwise you won't have a circuit. So you should be able to measure continuity from the spark plug connection back through the coil to the chassis.


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