Troubleshooting Tips for a Kohler Aegis Engine

Kohler-Engines-logoThe Kohler Aegis engine series is one of the most powerful engines currently on the market for residential and light commercial power equipment models. Though Kohler built the engine to be one of the most reliable options currently on the market, the occasional minor problem can prevent it from properly cranking or starting at a moment’s notice. Though these problems are inconvenient, they’re most often very easily solved by a bit of quick troubleshooting. Before assuming the worst, Aegis engine owners should proceed through a few logical steps to see whether or not they can solve the problem on their own.

Be Safe During Engine Troubleshooting

Troubleshooting should never put an engine owner at risk. To get the equipment back up and running, and avoid serious injury in the process, there are a few guidelines worth following. The first of these is to simply allow the engine to cool down if it was recently used around the home. Hot engines can burn the owner, and they can put the equipment at risk of sparking or smoking during some kinds of maintenance and troubleshooting.

All work on the engine should also be done either outdoors or in a well-ventilated indoor area, on a level surface that won’t be damaged or ruined if fluids spill from the engine at any point. Work should typically be done while wearing protective eyewear, and some owners may prefer to wear gloves to handle sharp or dangerous engine parts. With that in mind, where’s what to consider during a variety of common troubleshooting scenarios.

1. The Engine Won’t Crank

When the engine won’t crank, a few key problems are often to blame. Generally, the most significant of these problems involve the battery, the belts, the starter, or wiring problems. If this problem persists, consider some of the most common problems and address them as needed:

– The battery may charge or amperage may be low, or the connectors might be loose.
– The wiring harness is wired incorrectly
– The starter cable connectors are loose or the starter itself is malfunctioning
– The engine’s drive belt may be too tight or wedge between other components of the engine.

In addition to these common causes of crank trouble, engine owners might also want to check whether or not the combustion chamber has been flooded during the starting process, or whether there is an issue with fuses, connectors, or the safety switch.

2. The Engine Cranks But Does Not Start

If the engine just won’t start, the problem almost always comes down to the fuel composition or the level of fuel in the engine at any given time. Be sure that the fuel valve is in the proper position, and that the fuel in the engine is fresh fuel that has been purchased within the last several days. Stale fuel can cause the engine to either have difficulty starting or running consistently even if it does start. Also ensure that the proper fuel type is being used and that no water has made its way into the fuel tank. Kohler recommends unleaded fuel, with an 87 octane rating, for optimal operation.

Other common problems that might give the engine a tough time starting include a misconfigured wiring harness, a throttle or choke in the wrong position, or loose spark plug. Check these issues and try starting the engine again.

3. The Engine Runs Rough and Doesn’t Accelerate

An engine that runs rough and won’t accelerate generally requires a few adjustments to the spark plug and other key parts. Here’s what to check and adjust in order to regain mobility with the Kohler Aegis:

– Check the spark plug gap
– Allow the engine to warm up before operation
– Idle settings may be too low or too lean
– Check the electric clutch settings
– Ensure that the engine is not out of fuel

With these key aspects of engine operation checked and corrected, the engine should be able to run a great deal more smoothly. It should also be able to easily accelerate, limited only by the capabilities of the transaxle.

4. The Engine Backfires at Full Throttle

Engines that backfire at full throttle almost always do so because the fuel is contaminated with water or the fuel levels have begun to run low. In some cases, excessively rich or lean fuel mixtures may also cause the engine to experience backfires during regular operation and full throttle.

If the fuel levels and integrity have been verified, and the issue persists, consider cleaning the carburetor, resetting the throttle and choke, looking for faulty fuses, or checking for possible fluid leaks. Each of these issues could lead to real complications that extend well beyond the engine backfiring during use, so they should be fixed as soon as possible.

Shank’s Lawn Equipment is a Great Source for OEM Kohler Parts

Whether an engine problem requires a quick fix, an OEM replacement part, or just some expert advice, those who use the Kohler Aegis engine should visit to get what they need for a lasting repair. With an online parts lookup tool and plenty of industry experience, there’s something that will work for every issue and every owner. For those of you in the Waynesboro or Gettysburg PA area, we are close by in Chambersburg. Our Kohler Engine experts can answer any Kohler Engine questions that you may have.

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