If you own a lawn mower or other piece of outdoor equipment powered by a Kohler engine, you know how frustrating it can be when it won’t start.
Kohler engine cranks but won’t start
There are a few common reasons why a Kohler engine might crank but not start, and in this blog post, we’ll explore some of the most common causes and what you can do to troubleshoot the issue.
- Fuel Issues: The most common cause of a Kohler engine cranking but not starting is a lack of fuel or fuel-related issues. Ensure there is enough fuel in the tank, and the fuel filter is clean and free from debris. Check for clogs or blockages in the fuel lines or fuel pump, and make sure that the fuel shut-off valve is open.
- Ignition Issues: If the engine is not getting enough spark, it won’t start. Check the spark plug to ensure that it is clean and not worn out. If the spark plug is in good condition, check the ignition system for issues such as faulty wiring or a malfunctioning ignition coil.
- Airflow Issues: If the engine is not getting enough air, it won’t start. Check the air filter to ensure that it is clean and free from debris. If the air filter is clogged, replace it with a new one.
- Carburetor Issues: The carburetor is responsible for mixing air and fuel in the correct ratio for combustion. If the carburetor is clogged or not functioning properly, the engine won’t start. Check the carburetor for clogs, and clean or replace it if necessary.
- Mechanical Issues: If none of the above issues are present, the problem may be due to mechanical issues such as a damaged or worn-out engine component. Check the engine’s valves, pistons, and other components to ensure that they are functioning correctly.
Why does my mower crank but not start?
If your mower cranks but doesn’t start, there are a few possible reasons:
- Fuel Problems: If the fuel tank is empty or the fuel filter is clogged, your mower may crank but not start. You can check the fuel level and replace the fuel filter if necessary.
- Ignition Problems: If the spark plug is dirty, damaged, or old, it can prevent the mower from starting. You can check the spark plug and replace it if needed. The ignition switch or ignition coil may also be faulty and need to be replaced.
- Airflow Problems: If the air filter is clogged, it can restrict airflow to the engine and cause it to fail to start. You can check the air filter and replace it if needed.
- Carburetor Problems: If the carburetor is clogged or damaged, it can prevent fuel from reaching the engine and cause it to fail to start. You can clean or rebuild the carburetor or replace it if needed.
- Mechanical Problems: If the engine components are worn out or damaged, it can prevent the mower from starting. You can check the engine components and repair or replace them if needed.
There are many possible reasons why a mower may crank but not start. By checking the fuel system, ignition system, airflow, carburetor, and other engine components, you can diagnose and fix the issue, getting your mower up and running again in no time.
How does the fuel pump work on a Kohler engine?
The fuel pump on a Kohler engine is a mechanical diaphragm pump that is responsible for delivering fuel from the fuel tank to the carburetor. The fuel pump is located on the side of the engine and is driven by an eccentric on the camshaft.
When the engine is running, the eccentric on the camshaft causes the fuel pump arm to move up and down, which in turn causes the diaphragm to move back and forth. This creates a vacuum that draws fuel from the fuel tank through the inlet valve and into the pump chamber. When the diaphragm moves back, it pushes fuel through the outlet valve and into the fuel line leading to the carburetor.
The fuel pump also includes a pressure relief valve that regulates the pressure of the fuel going to the carburetor. If the pressure exceeds the set limit, the valve will open and allow excess fuel to return to the fuel tank.
In summary, the fuel pump on a Kohler engine works by using a mechanical diaphragm to draw fuel from the fuel tank and deliver it to the carburetor. The pump is driven by an eccentric on the camshaft and includes a pressure relief valve to regulate the fuel pressure.
A Kohler engine that cranks but won’t start can be frustrating, but there are many possible causes for this problem. By checking the fuel system, ignition system, airflow, carburetor, and other engine components, you can troubleshoot and fix the issue, getting your lawn mower or other equipment up and running again in no time