No spark when crankin but some spark when key is turned off.

lightemup24 · Apr 22, 2016

Hi I have a 682 cub cadet I'm working on. I started it up and drove it in front of the garage. I went to start it back up and now I have no spark while cranking. Is there a way to bypass the ignition wiring to test the coil.

Bob · Apr 22, 2016

The engine is a Kohler KT17 that uses a "Kettering" ignition system.

The coil does not require an external resistor, so there's nothing to stop you from jumpering full battery voltage to the (+) primary terminal on the coil and seeing if it will start.

(If the engine has been updated to a Magnum 18, it will have self-powered EI, which must NOT be connected to battery voltage!)

Below is a link to the factory shop manual for the KT17, showing the charging and ignition circuits.
KT17 Manual

boomers_influence · Apr 23, 2016

light
spark when letting the key return
to the run position,
tells me bad ignition switch.
to test,
use a multimeter set for DC volts.
turn the key to run, you should have
about 12 volts at the + side of the coil.
NOW in the start position you should
have close to the same voltage.
a helper is handy to have when doing this.
thank you. boomer

lightemup24 · Apr 23, 2016

Thanks guys I figured it out. I ran the jumper and it started right up. It ended up being a bad connection at the seloniod.

No spark when crankin but some spark when key is turned off.

lightemup24

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Bob

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boomers_influence

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lightemup24

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