Kohler CH6 troubleshooting: 13 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Kohler CH6 — full specs, parts & maintenance.
| Symptom | Cause | Remedy |
|---|---|---|
| Engine Cranks But Will Not Start | Empty fuel tank, Fuel shutoff valve closed, Dirt or water in the fuel system, Clogged fuel line, Spark plug lead disconnected, Key switch or kill switch in “off” position, Faulty spark plug, Faulty ignition module | |
| Engine Starts But Does Not Keep Running | Restricted fuel tank cap vent, Dirt or water in the tuel system, Faulty choke or throttle controls, Loose wires or connections that short the kill terminal of ignition module to ground, Faulty cylinder head gasket, Faulty carburetor | |
| Engine Starts Hard | PTO drive is engaged, Dirt or water in the fuel system, Clogged fuel line, Loose or faulty wires or connections, Faulty choke or throttle controls, Faulty spark plug, Low compression, Faulty ACR mechanism | |
| Engine Will Not Crank | PTO drive is engaged, Battery (if equipped) is discharged, Safety interlock switch is engaged, Loose or faulty wires or connections, Faulty key switch or ignition switch, Faulty electric starter (if equipped), Retractable starter not engaging in drive cup, Seized internal engine components | |
| Engine Runs But Misses | Dirt or water in the fuel system, Spark plug lead disconnected, Loose wires or connections that intermittently short the kill terminal of ignition module to ground, Engine overheated, Faulty ignition module | |
| Engine Will Not Idle | Restricted fuel tank cap vent, Dirt or water in the fuel system, Faulty spark plug, Idle fuel adjusting needle improperly set, Idle speed adjusting screw improperly set, Low compression | |
| Engine Overheats | Air intake/grass screen, cooling fins, or cooling shrouds clogged, Excessive engine load, Low crankcase oil level, High crankcase oil level, Faulty carburetor | |
| Engine Knocks | Excessive engine load, Low crankcase oil level, Old/improper fuel, Internal wear or damage | |
| Engine Loses Power | Low crankcase oil level, High crankcase oil level, Dirty air cleaner element, Dirt or water in the fuel system, Excessive engine load, Engine overheated, Faulty spark plug, Low compression, Exhaust restriction | |
| Engine Uses Excessive Amount Of Oil | Incorrect oil viscosity/type, Clogged or improperly-assembled breather, Worn or broken piston rings, Worn cylinder bore, Worn valve stems/valve guides | |
| Battery . Check the specific gravity of battery. If low, recharge or replace battery as necessary. | Starter Does Not Energize | 1. Clean corroded connections and tighten loose connections. 2. Replace wires in poor condition and with frayed or broken insulation. |
| Starter Energizes But Turns Slowly | Transmission | Make sure the clutch or transmission is disengaged or placed in neutral. This is especially important on equipment with hydrostatic drive. |
| NO CRANKCASE VACUUM/PRESSURE IN CRANKCASE | 1. Crankcase breather clogged or inoperative. 2. Seals and/or gaskets leaking. Loose or improperly-torqued fasteners. 3. Piston blowby or leaky valves. (Confirm by inspecting components.) 4. Restricted exhaust. | 1. Disassemble breather, clean parts thoroughly, reassemble, and recheck pressure. 2. Replace all worn or damaged seals and gaskets. Make sure all fasteners are tightened securely. Use appropriate torque values and sequences when necessary. 3. Recondition piston, rings, cylinder bore, valves, and valve guides. 4. Repair/replace restricted muffler/exhaust system. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Empty fuel tank, Fuel shutoff valve closed, Dirt or water in the fuel system, Clogged fuel line, Spark plug lead disconnected, Key switch or kill switch in “off” position, Faulty spark plug, Faulty ignition module. See the table for the matching fixes.
Documented causes: PTO drive is engaged, Dirt or water in the fuel system, Clogged fuel line, Loose or faulty wires or connections, Faulty choke or throttle controls, Faulty spark plug, Low compression, Faulty ACR mechanism. See the table for the matching fixes.
Documented causes: PTO drive is engaged, Battery (if equipped) is discharged, Safety interlock switch is engaged, Loose or faulty wires or connections, Faulty key switch or ignition switch, Faulty electric starter (if equipped), Retractable starter not engaging in drive cup, Seized internal engine components. See the table for the matching fixes.