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| Home / Engines / Kohler Engines / Kohler KT725 |
Kohler 7000 Series KT725 Problems
| Engine Model: Kohler 7000 Series KT725 |
| Engine Type: 4-cycle twin-cylinder vertical shaft air-cooled gasoline engine |
| Total Displacement: 44.2 cu.in (725 cc) |
| Rated Engine Power: 22 Hp (16.4 kW) at 3600 rpm |
| Fuel System: Keihin or Walbro carburetor with fixed main jet |
| Engine starts up hard or won't start |
Fuel tank is empty - Fill fuel up.
Low-quality gasoline - Change fuel.
Dirt and debris in fuel system - Remove debris and dirt.
Defective spark plug wire connection - Inspect the spark plug wire connection, replace or repair.
Defective spark plug - Spark plug need to be replaced.
Fuel filter is dirty - Fuel filter needs to be replaced.
Brake pedal not pushed down - Push the brake pedal down.
Carburetor settings incorrect - Adjusting as required.
Bad compression - Check and change damaged parts.
Choke cable is worn or not adjusted properly - Replace cable or adjust correctly.
| Engine runs intermittently |
Air intake grill is clogged - Clean and wash as required.
Ignition system problems - Test ignition and replace failed parts.
Defective or stuck choke cable - Service or replace the cable.
Clogged air filter - Service or replace air filter.
Fuel pump is defective or dirty - Test fuel pump and replace if necessary.
| Engine starts but immediately stops |
Faulty spark plug - Install new spark plug.
Faulty or dirty carburetor - Clean or change carburetor.
Faulty ignition coil - Install a new ignition coil.
Damaged or weak valve springs - New valve springs need to be installed.
Valves sticking - Valves must be cleaned.
| Engine overheated |
Insufficient engine oil - Fill up the oil to required level.
Engine overload - Reduce engine load.
Cooling fins are clogged - Clean and wash as required.
Too lean carburetor mixture - Set the carburetor properly.
Wrong ignition timing - Set the ignition timing properly.
Valve setting is incorrect - Adjust valves correctly.
| Engine knocking or noise |
Stale gasoline - Change gasoline.
Engine is overloaded - Reduce engine load.
Engine oil level is insufficient - Checking oil level and add if necessary.
Incorrectly set low idle speed - Adjustment required.
Fuel pump is defective or dirty - Inspect fuel pump and change as required.
Main bearings or crankshaft wear - Have bearings or crankshaft replaced.
Incorrect valve clearance - Need to adjust valve clearance.
Piston rings or cylinder bore are worn - Replace defective parts.
| Engine power is too low |
Clogged or improperly adjusted carburetor - Service or correctly adjust carburetor.
Air filter is blocked - Clean or replace air filter.
Fuel pump is dirty or defective - Check fuel pump and change if required.
Defective ignition system - Test ignition and replace failed parts.
Blown cylinder head gasket - Install new cylinder head gasket.
Valves are burned or stuck - Clean or replace valves.
Worn or bent push rod - Replace push rod.
Faulty cylinder block parts - Replace defective components as required.
Oil filter element is clogged (if equipped) - Replace or clean oil filter.
| High fuel consumption |
Choke didn't open fully - Adjust or change choke cable.
Carburetor main jet is improperly adjusted - Adjust the carburetor main jet properly.
Spark plug is loose or faulty - Change or re-tighten spark plug.
Valves are stuck, worn, or burned - Service or replace valves.
Worn rings, piston, or sleeve - Change defective components.
Valve clearance is not correct - Need to adjust valve clearance.
| Excessive engine oil consumption |
Gaskets or seals are excessively worn - Replace defective parts.
Valve guides and stems are worn - Valves need to be changed.
Stuck or defective piston rings - Install new piston rings.
Cylinder liner or piston is scuffed - Inspect liner and piston, replace as necessary.
Breather hose or pipe is clogged - Replace or service.
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