Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Good morning. Have you ran a cylinder balance test? Loosen the spark plug wires, and with the engine idling, remove one wire at a time. The engine should continue to run. If engine dies when one wire is removed, the opposite cylinder is not firing. Check it for spark. With the Kohler twin, it can have a bad coil, letting engine only run on one cylinder. Causing the low power. If you have a bad coil, Kohler recommends replacing both coils to the newer style coils.
Can you run the test when the engine is hot and acting up? It may only do it when engine is hot.
Let's try that, thanks.
So it does not seem to be the coils failing. So may be a fuel problem? Gets better if you stop the blades? Does working the choke help or hurt? I wonder if the supply if fuel from the tank is adequate? Can yu make a test line and attach it to the fuel pump inlet port, nd drop it back into the fule tank filler opening for test, bypassing the tank and the outlet hose?
If that makes no difference, tat leaves the electric solenoid in the base of the carburetor, Best test for it, is to remove it and disable it by removing the inner parts.
Fuel filter will never show to be completely full, so don't let that be something that worrys you.
The fuel solenoid is anti-backfire solenoid, that closes the main jet in the carburetor when it closes. Used to keep engine from backfiring when key is turned off hot.