Overheating (?) JD lawn tractor


Old 08-08-09, 03:01 PM
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Join Date: Aug 2009
Location: IL
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Overheating (?) JD lawn tractor

I think my JD 155 lawn tractor is overheating. After running about 1/2 hour is simply dies. It will then backfire on attempted starting. After cooling, no problem starting - but cycle repeats. Today's weather: 90+F, Midwest humidity.

I have already removed the engine (Kohler CV15S - 15 HP) cowel and cleaned out the mouse debris. (Ongoing problem.) No problems with the Big Three (fuel, air, spark). Any advice would be appreciated.
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Old 08-08-09, 05:33 PM
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Sounds like a failing ignition coil.
Old 08-16-09, 09:11 AM
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Join Date: Aug 2009
Location: IL
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Thanks. Is this a difficult repair? Where is the coil located on this? 'm a fair Ishade tree mechanic and usually keep the mowers running, but have not done this.
Old 08-16-09, 11:34 AM
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It mounts close to the flywheel and gets its signal from the magnets on the flywheel. There's a couple of small bolts that mount it. The gap between the coil and flywheel is a standard .010. Most of us put a business card (or about) between the coil and flywheel magnet, let the magnet draw it down against the card, tighten the bolts, turn the flywheel a little and pull out the card.

Just pull off the flywheel shroud and you'll see everything.

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