Exmark Zero Turn Running Rough, Low Power, Popping, Bogs Down Under A Load Full Diagnostics & Repair

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We go over an Exmark 52" Pioneer S zero turn mower model PNS720KC523 with a Kohler KT720 engine that is running rough, has low power, occasionally makes popping noises and bogs down when the blades are engaged.

It was brought in and customer said they were mowing and it just started bogging down then would pick back up.

Intermittently it will sound and run ok but runs horrible when the blades are engaged. It definitely has loss of power or no power under a load when mowing

We quickly find that the mower is only running on one cylinder but not for the reasons you may think this is happening.

We do a full diagnostic on it and end up finding bad ignition coils.

We go through the full process to find out if this is your issue and testing process to get there.

Sometimes if the spark cutting out is more consistent you can get an in-line spark tester to pick up the loss of spark. In this case it checked out good even though it was not sparking like it should have been

We go through the full process to figure out what is wrong if it seems like you engine is at half power, it probably is for one reason or another

We like to go through the entire thing to make sure there are no issues.

We end up replacing the ignition coils and getting it back running full power.

Find part number 32 584 06-S to replace what we replace in the video at https://amzn.to/3XDS1vf

This is a Kohler KT720-3012 which is part of the Kohler 7000 series engines which include KT725, KT730, KT735, KT740 and KT745.

Look up your part numbers based on the spec number of your engine before ordering

Tools Used:

Neiko Impact Socket Set https://amzn.to/3ygAtwP
Dewalt 20V Impact Driver https://amzn.to/3z16OaE
Titan Impact Bit Set https://amzn.to/3LChxvk
Right Angle Milwaukee Ratchet https://amzn.to/3Xdfxki

Video equipment:
GoPro Hero 11 https://amzn.to/48rIcVz

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#exmark #kohler #easyrepair #smallenginerepair #smallbusiness #individualizedrepair

About Us:
My name is Martin. I have been repairing tools and small engines for almost 20 years. We operate a small engine repair shop in Illinois. We service / repair Briggs & Stratton, Kohler, Kawasaki, John Deere, Cub Cadet, Toro Tecumseh, Loncin, Honda, Craftsman, Husqvarna, MTD, Troy Bilt, Simplicity, John Deere, Exmark, LCT, Generac and many more brands. We work on riding mowers, walk behind mowers, snow blowers, zero turns, generators, pressure washers and much more. We normally repair about 3,000 pieces of equipment every year and look at many more that are beyond an affordable repair. Hopefully our videos will save you some money and give you the information you need to work on your own equipment or figure out the issue at hand.

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Please be careful when repairing any piece of equipment and follow all possible safety measures. This video is for entertainment purposes only.