Mustang 345 No Spark

[jim6346]

Hi Everyone!! Just picked up an older Mustang 345 Skid Steer. It turns over fine but is not getting any spark. I have replaced the Plugs, Coil, Cap, Rotor, Points, and Condenser. Verified the gap on the points is .025 (per the manual) and the plugs are .032. I have 12V on the + side of the coil with the ignition on. I have 12V on one side on the resistor and ~5V on the other side. I have ~5V on one side of the points and verified the other side is tied to ground. The points are opening and closing, but I don't see any spark at all. I am stumped, hoping someone on here might have some ideas? Thanks,, Jim

 

[Tazza]

You have replaced all of the ignition system, could something be wired wrong to not get the spark?
Can you try running +12v direct to it just in case there is a weak connection somewhere? It may read 12v but when under load it's failing.
You didn't mention the leads, could they be burnt out inside?

 

[jim6346]

You have replaced all of the ignition system, could something be wired wrong to not get the spark?
Can you try running +12v direct to it just in case there is a weak connection somewhere? It may read 12v but when under load it's failing.
You didn't mention the leads, could they be burnt out inside?

Hi, Yes, I ran 12V to the + side of the coil, still nothing. Not sure what leads you are referring to? Thanks, Jim

 

[Tazza]

Hi, Yes, I ran 12V to the + side of the coil, still nothing. Not sure what leads you are referring to? Thanks, Jim

I was talking about the spark plug leads, the high voltage ones.

 

[jim6346]

I was talking about the spark plug leads, the high voltage ones.

Yep, replaced those also. Got me stumped!! Jim

 

[Tazza]

Yep, replaced those also. Got me stumped!! Jim

There really isn't anything left..... You have replaced pretty well the entire ignition system.

 

[jim6346]

There really isn't anything left..... You have replaced pretty well the entire ignition system.

Just for future reference, it turned out to be the ballast resistor, the only thing I hadn't changed. The voltage was reading about 1V too low. Runs like a champ now. Thanks everyone and have a Merry Christmas!! Jim

 

[Tazza]

Just for future reference, it turned out to be the ballast resistor, the only thing I hadn't changed. The voltage was reading about 1V too low. Runs like a champ now. Thanks everyone and have a Merry Christmas!! Jim

Always the last thing you check......
At least it's fixed.