Specifications
Ratings spec sheet not in our library yet — see the documents below.
Maintenance & consumables
for the Kohler CH18-25| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Service air cleaner element. Replace heavy-duty air cleaner element and check inner element. | — | 500 hr | find | |
| Fuel filter | EFI Engines: A special, high volume, high pressure filter with greater filtration capabilities and internal surface area is used. See Figure 15. | — | find | ||
| Oil filter | Replace the oil filter at least every other oil change (every 200 hours of operation). Always use a genuine Kohler oil filter, Part No. 12 050 OI-S. | — | 200 hr | find | |
| Belt | Have Bendix starter drive serviced. Have solenoid shift starter disassembled and cleaned. | — | 500 hr | find | |
| Coolant | Check oil cooler fins, clean as necessary (if equipped). | — | 250 hr | ||
| Oil | Change oil as follows (see Figures 8 and 9): 1. Clean the area around the oil fill cap/dipstick before removing it. 2. Remove one of the oil drain plugs, oil fill cap, and dipstick. Be sure to allow ample time for complete drainage. 3. Reinstall the drain plug. Make sure it is tightened to 13.6 N-m (10 ft. lb.) torque. 4. Fill the crankcase with new oil of the proper type to the “F” mark on the dipstick. Always check the level with the dipstick before adding more oil. 5. Reinstall the oil fill cap and tighten securely. Reinstall dipstick. | — | 100 hr |
Common questions
What engine does the Kohler CH18 use?
The Kohler CH18 is powered by the Kohler CH18-25 engine.
Troubleshooting
4Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Engine troubles that appear to be fuel system related | Check the following areas before adjusting the carburetor: - Make sure the fuel tank is filled with clean, fresh gasoline. - Make sure the fuel tank cap vent is not blocked and that it is operating properly. - If the fuel tank is equipped with a shut-off valve, make sure it is open. - If the engine is equipped with an in-line fuel filter, make sure it is clean and unobstructed. Replace the filter if necessary. - Make sure fuel is reaching the carburetor. This includes checking the fuel lines and fuel pump for restrictions or faulty components, replace as necessary. - Make sure the air cleaner element is clean and all air cleaner element components are fastened securely. | |
| Engine hard to start, runs roughly, or stalls at low idle speed | If after checking the items listed above, adjust or service the carburetor. There are no accessible mixture adjustment screws on the carburetor. The only setting which can be changed is the low idle speed. 1. Start the engine and run at half throttle for 5 to 10 minutes to warm up. The engine must be warm before making final settings (steps 2 and 3). 2. Low idle Speed Setting: Place the throttle control into the “idle” or “slow” position. Set the low idle speed to 7200 RPM (+ 75 RPM) by turning the low idle speed adjusting screw in or out. Check the speed using a tachometer. *NOTE: The actual low idle speed depends on the application - refer to equipment manufacturers recommendations. The standard low idle speed is 1200 RPM. 3. If proper operation is not restored after adjusting the low idle speed, carburetor servicing by an authorized Kohler Engine Service Dealer may be required. | |
| MIL comes on | If the MIL comes on, or the engine becomes hard to start, runs roughly, or stalls at low idle speed, initial checks should be made in the following areas: - Make sure the fuel tank is filled with clean, fresh gasoline. | |
| Will Not Start | Improper Fuel, Dirty Fuel Line/System, Grass Screen, Overloaded | Clean or replace fuel filter; clean air cleaner element and precleaner; ensure proper battery condition. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
7| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 24 083 02-4 | Oil Cooler, CH25 | 1 | Oil cooler | PartsGeek |
| 24 083 03-4 | Paper Element, Heavy-Duty Air Cleaner | 1 | Paper element | PartsGeek |
| 24 083 05-4 | Oil Cooler, CH26 | 1 | Oil cooler | PartsGeek |
| 25 083 01-S | Outer Element, Heavy-Duty Air Cleaner | 1 | Outer element | PartsGeek kuduparts $19.00 |
| 25 083 04-S | Inner Element, Heavy-Duty Air Cleaner | 1 | Inner element | PartsGeek |
| 25 755 20-S | Cleanout Kit (Black) | 1 | Cleanout kit | PartsGeek |
| KO3226 | Starter Service Kit | 1 | Starter | PartsGeek |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Owner's manual — 2459001 b 808 (Kohler)Owner's manual — Owner's Manual CH18-26 (Kohler)Parts manual — ENGINE-ACCESSORIES-PETROL (Kohler)Service manual — 24 690 06 (Kohler)Service manual — 24 690 30 EN (Kohler)Service manual — 24 690 35 ESS (Kohler)Service manual — 300 hour Oil change kit (Kohler)Service manual — CH Twin (Kohler)Service manual — Kohler PA-CH740-3362 Engine Service Manual (Kohler)Service manual — Kohler-CH-Series-Service-Manual (Kohler)Service manual — Kohler-Service-Repair-Manual-Command-CH18-CH20-CH22-CH23-CH25-CH26 (Kohler)Service manual — Kohler-Study-Guide (Kohler)Service manual — sm 24 690 06 (Kohler)Service manual — tp2428c (Kohler)