Specs(ohm) for Fairbanks Morse magneto?

[clytle374]

I apologize in advance for it being neither slow nor diesel, but it is old if that helps.  Old Single cylinder 5hp Wisconsin.   Thought someone here might know. 

Type FMJ.  Intermittent spark.  Works occasionally when holding the spark plug lead.    It probably is the coil, but would like to double check since it is $86, and I'm not sure the engine is worth fixing.   I spent several hours in vain searching the net for them. 

I'm also confused that there are two leads from the coil connected to the points.  The high tension is 5.5K ohms, one lead to the points is open and the other is 1 ohm. 

Cory

[mobile_bob]

how are the points and condensor?

my bet is crappy points, and probably a bad condensor

bob g

[Tom]

If you have a source of 12 vdc, I believe you can get a set points and condenser to use with an automotive coil. I have a R-7 Wisconsin and both types are available.

[clytle374]

how are the points and condensor?

my bet is crappy points, and probably a bad condensor

bob g

Points are good.  Condenser isn't shorted out, and has some capacitance still. 

If you have a source of 12 vdc, I believe you can get a set points and condenser to use with an automotive coil. I have a R-7 Wisconsin and both types are available.

It wouldn't be hard to do, other than the 12V.

[clytle374]

Come to find out a little surface rust on the magnet rotor, and it won't work.  A little emery cloth and it works again. 

[Tom]

Thanks for sharing the solution! I'll have to put that one in my mysterious solutions for no spark file.