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Old 09-27-2022, 10:41 AM
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R Bedell R Bedell is offline
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Location: Michigan
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Default SV715 Engine Miss Fire

My Son-In-Law has a 2012 Cub Cadet LTX1046M that has about 225 Hrs on the Meter, and has a Kohler Courage SV715 engine in it.

A couple of weeks ago, he started having engine problems with it. When in normal mowing mode, full throttle and moving at normal speed, all is well. BUT.... when you slow down the tractor speed, to navigate a turn or go around a tree, etc, then engine will start to misfire, to include back firing. You press on the pedal to go forward and it goes away.

I took the tractor for a spin yesterday myself. It has described as above. I also noticed when you slow the speed down (reducing the load) and when the mis-firing starts, if you turn off the mower deck, the engine runs fine.

The S-I-L shot the Parts Cannon at it, and replaced the following:
* New Fuel Filter
* New Fuel Pump
* New Carb
* New Spark Plugs

Procedures done:
* Pulled the fuel tank and cleaned
* Bypassed the Fuel Pump to gravity flow
* Vented the Gas Cap

ALL of the above made NO difference.

So, I am seeing something happening when the tractor is slowing down, reducing it's load. At idle or full throttle, no issue. If you are mowing, as long as you don't slow down, no problem.

I am thinking, it might have something to do with the Governor. It may not respond correctly, to load conditions.

But, that is why I am here. I don't know that much about the Kohler Courage and looking for suggestions.

Please advise.
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Old 09-27-2022, 08:00 PM
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DeltaCub DeltaCub is offline
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Is any of the wire harness getting pinched or pulled by the steering or the hydro linkage?
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Old 09-28-2022, 08:31 AM
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They live about 15 miles away from me. I 'll take a look the next time I go to their place.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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