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Discussion Starter · #1 ·
I've the manual for a Kohler SP730S 25 horse. Engine has no fire on either plug. Sat out all winter (shame on me). Ive started with the electrical system. Have the service manual, (lots of Greek). Have a Cen-Tech Digital Meter ((I'm not familiar with the proper use of this particular meter. Attempting a Ohm test on one of two coils, and am cleaning the rust that has accumlated.

I can only get a response (in range) with a test from positions 2 to 4, no other response from the othe test points. Is that coil shot? Or am I just not using the meter correctly?

Second question; The engine is a Vertical shaft, two cylinder, that I thought was only to have one coil (that seemed strange to me). There are coils for each cylinder? What is the correct range in ohms, for these used coils.

Thanks for your help and I hope I've given enought details.

Bob
 

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I'm not finding a service manual for the model number SP730S on Kohler's website? Could this be a 7000 series KT730?

Kohler Engines: Owners and Service Manuals: Manuals and Maintenance

If it does indeed have a separate coil for each plug I would think odds would be against both coils failing and no spark to both plugs at the same time. Rather I would look back upstream so to speak further such as the kill wire to the coils being shorted either itself or an ignition switch issue, or if it has some sort of an ignition control module that controls the coils.

Not sure though what to make of your resistance readings on the coil. You might try setting your meter to the diode check position and see if you can measure anything besides an open circuit.
 

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Discussion Starter · #3 ·
TEsting Coil

Played with the twin coils, neither was bad. Service manual led to several mis-understandings. I got an ohm reading only at position 2-4 on one coil, and thought it was bad, however after I took emery cloth to the magneto, and coil contacts, re-set the coil and cleared the carb, of old gas the engine runs like it's brand new. I'm a happy camper, had another mower picked out which If I had got bought it would have cost close to 2,000.00. This is a great forum. Thanks for you reply.

Bob
 
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