B&S mag coil

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Old 09-15-18, 03:59 PM
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B&S mag coil

Hi All, what should the resistance be in a good coil ? I am getting 6.3 K , plug wire to coil frame, problem is no spark, plug is good, points are good, how do I test a condenser?
Geo
 
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Old 09-15-18, 06:48 PM
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Resistance of coil is usually measured from coil's points input terminal to coil's plug wire terminal (about 5k ohms). Isn't the coil frame a non conductor like plastic? I would think the resistance for the measurement indicated would be infinity. Condensers can be crudely tested with an analog multimeter in the ohms selection. If you don't have an analog multimeter. a new condenser might be the least expensive route. How do you know the plug and points are good?
 
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Old 09-15-18, 11:58 PM
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@Geochurchi

What type of equipment is this B&S coil off of?
 
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Old 09-16-18, 08:34 AM
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Troubleshooting Points and Condenser. Havee a good one. Geo
http://www.frankshospitalworkshop.co...0Ignitions.pdf
 
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Old 09-16-18, 02:12 PM
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Put your multimeter to Ohms and one probe to the condenser terminal and the other probe on the case. The ohms should start out low and quickly rise to out of range.
 
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Old 09-17-18, 08:41 AM
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I think this motor maybe toast, the plunger that rides on the crankshaft is not moving, hence the points arenít moving and thus no spark,
What is the best way to pull the seal out to remove the backplate that the points are mounted on?
B&S 6 FB
Geo
 
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Old 09-17-18, 09:06 AM
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If everything is working take the points'condenser/coil off and replace the coil with a module type coil. all you need is the flywheel magnet to produce spark. It should run fine that way.

That apparently is a pre-1986 engine.
 
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Old 09-17-18, 09:20 AM
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Hi, actually it is 1923/24 vintage, don’t want to spend to much on it and trying to keep as original as possible, I did get the seal out and the plunger is visible, I have the plunger out finally, new one is available,I would assume that the new plunger should ride up and down smoothly, correct?
Geo
 

Last edited by Geochurchi; 09-17-18 at 12:02 PM.
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Old 09-17-18, 12:13 PM
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Don't mind helping people,but get upset when info provided gets changed. Initial post states points are good, I questioned how was this determined, Later post states points are not opening/closing. Please help me understand your first post since ignition points in a manufacturer's box sitting on a shelf can be good.
 
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Old 09-17-18, 01:31 PM
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Points were good, no pitting, plunger from crankshaft was frozen in place, soon to be replaced.
Sorry for any confusion.
Geo
 
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