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 | ||
| Fuel filter | EFI Engines: A special, high volume, high pressure filter with greater filtration capabilities and internal surface area is used. See Figure 15. | — | |||
| 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 | ||
| Battery | Battery Charging: WARNING: Explosive Gas! Batteries produce explosive hydrogen gas while being charged. To prevent a fire or explosion, charge batteries only in well ventilated areas. Keep sparks, open flames, and other sources of ignition away from the battery at all times. Keep batteries out of the reach of children. Remove all jewelry when servicing batteries. | — | |||
| Belt | Have Bendix starter drive serviced. Have solenoid shift starter disassembled and cleaned. | — | 500 hr | ||
| 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 | ||
| Spark plug | Every 200 hours of operation, remove the spark plugs, check condition, and reset the gap or replace with new plugs as necessary. The standard spark plug is a Champion@ RC12YC (Kohler Part No. 12 132 02-S). A high-performance spark plug, Champion@ Premium Gold 2071 (used on Pro Series engines, Kohler Part No. 12 132 06-S) is also available. | — | 250 hr |
Service intervals
18| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Low-profile precleaner | Clean | 25 hr | 12 mo | Service/replace |
| Low-profile precleaner | Replace | 25 hr | 12 mo | Service/replace; or annually. Air Cleaner/Intake |
| Cooling shrouds | Clean | 100 hr | 12 mo | Remove cooling shrouds and clean cooling areas |
| Cooling shrouds and cooling areas | Clean | 100 hr | 12 mo | Remove cooling shrouds and clean cooling areas |
| Cooling shrouds/areas | Clean | 100 hr | 12 mo | Every 100 Hours or Annually; remove cooling shrouds and clean cooling areas |
| Engine oil | Change | 100 hr | 12 mo | |
| Oil cooler fins | Check | 100 hr | 12 mo | Every 100 Hours or Annually (if equipped); clean as necessary |
| Oil cooler fins | Inspect | 100 hr | 12 mo | Check; clean as necessary (if equipped) |
| low-profile air cleaner element | Replace | 100 hr | 12 mo | Or annually |
| oil | Change | 100 hr | 12 mo | Or annually |
| Fuel filter | Replace | 200 hr | Every 200 Hours | |
| Oil filter | Change | 200 hr | Every 200 Hours. Lubrication System | |
| Heavy-duty air cleaner element | Replace | 250 hr | 12 mo | and check inner element |
| Heavy-duty air cleaner element / inner element | Replace | 250 hr | Every 250 Hours; replace element and check inner element | |
| heavy-duty air cleaner element and inner element | Replace | 250 hr | Replace element and check inner element | |
| Crankshaft spline | Lubricate | 500 hr | Have a Kohler authorized dealer perform this service | |
| Heavy-duty inner air cleaner element | Replace | 500 hr | 12 mo | Every 500 Hours |
| Spark plugs | Replace | 500 hr | 12 mo | and set gap. Electrical System |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
60| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Angle | Maximum Angle of Operation | 25 | ° | @ full oil level |
| Clearance | Camshaft End Play (w/shim) | 0.076/0.127 | mm | 0.0030/0.0050 in. |
| Clearance | Camshaft Running Clearance | 0.025/0.063 | mm | 0.0010/0.0025 in. |
| Clearance | Camshaft bore I.D. (max wear limit) | 20.038 mm (0.7889 in.) | mm | max wear limit |
| Clearance | Camshaft bore I.D. (new) | 20.000/20.025 mm (0.7874/0.7884 in.) | mm | new |
| Clearance | Camshaft end play (w/shim) | 0.076/0.127 mm (0.0030/0.0050 in.) | mm | |
| Clearance | Camshaft running clearance | 0.025/0.063 mm (0.0010/0.0025 in.) | mm | |
| Clearance | Connecting Rod-to-Crankpin Running Clearance | New: 0.030/0.055 mm (0.0012/0.0022 in.); Max Wear Limit: 0.070 mm (0.0028 in.) | mm (in.) | |
| Clearance | Connecting Rod-to-Crankpin Running Clearance (Max. Wear Limit) | 0.070 | mm | 0.0028 in. |
| Clearance | Connecting Rod-to-Crankpin Running Clearance (New) | 0.030/0.055 | mm | 0.0012/0.0022 in. |
| Clearance | Connecting Rod-to-Crankpin Side Clearance | 0.26/0.63 | mm | 0.0102/0.0248 in. |
| Clearance | Connecting rod-to-crankpin running clearance (max wear limit) | 0.070 mm (0.0028 in.) | mm | max wear limit |
| Clearance | Connecting rod-to-crankpin running clearance (new) | 0.030/0.055 mm (0.0012/0.0022 in.) | mm | new |
| Clearance | Connecting rod-to-crankpin running clearance, max wear limit | 0.070 | mm (0.0028 in.) | max wear limit |
| Clearance | Connecting rod-to-crankpin running clearance, new | 0.030/0.055 | mm (0.0012/0.0022 in.) | new |
| Clearance | Connecting rod-to-crankpin side clearance | 0.26/0.63 mm (0.0102/0.0248 in.) | mm | |
| Clearance | Crankshaft End Play (except CH25 below Serial No. 2403500008) | 0.050/0.750 | mm | 0.0020/0.0295 in. |
| Clearance | Crankshaft End Play (free) | 0.070/0.590 | mm | 0.0028/0.0230 in. |
| Clearance | Crankshaft End Play (w/thrust bearing components) | 0.070/1.190 | mm | 0.0028/0.0468 in. |
| Clearance | Crankshaft end play (except CH25 engines below Serial No. 2403500008) | 0.050/0.750 mm (0.0020/0.0295 in.) | mm | |
| Clearance | Crankshaft end play (free) | 0.070/0.590 mm (0.0028/0.0230 in.) | mm | free |
| Clearance | Crankshaft end play (thrust bearing models, for adjustment) | 0.05/0.50 mm (0.0020/0.0197 in.) | mm | |
| Clearance | Crankshaft end play (w/thrust bearing components) | 0.070/0.270 mm (0.0028/0.0100 in.) | mm | |
| Clearance | Cylinder Bore I.D. | New: 77.000/77.025 mm (3.0315/3.0325 in.); Max Wear Limit: 77.063 mm (3.0340 in.) | mm (in.) | 77 mm bore |
| Clearance | Cylinder Bore I.D. | New: 80.000/80.025 mm (3.1496/3.1506 in.); Max Wear Limit: 80.065 mm (3.1522 in.) | mm (in.) | 80 mm bore |
| Clearance | Cylinder Bore I.D. | New: 82.988/83.013 mm (3.2672/3.2682 in.); Max Wear Limit: 83.051 mm (3.2697 in.) | mm (in.) | 83 mm bore |
| Clearance | Cylinder Head Max. Out-of-Flatness | 0.076 | mm | 77 mm and 80 mm bores; 0.003 in. |
| Clearance | Cylinder Head Max. Out-of-Flatness | 0.076 mm (0.003 in.) for 77 mm and 80 mm bores; 0.1 mm (0.004 in.) for 83 mm bore | mm (in.) | |
| Clearance | Cylinder Head Max. Out-of-Flatness | 0.1 | mm | 83 mm bore; 0.004 in. |
| Clearance | Cylinder bore I.D. (CH18/CH20/CH22/CH620-CH640, new) | 77.000/77.025 mm (3.0315/3.0325 in.) | mm | new |
| Clearance | Cylinder bore I.D. (CH22/CH23/CH670-CH680, new) | 80.000/80.025 mm (3.1496/3.1506 in.) | mm | new |
| Clearance | Cylinder bore I.D. (CH25/CH730/CH740/CH750, new) | 82.988/83.013 mm (3.2672/3.2682 in.) | mm | new |
| Clearance | Cylinder head max out-of-flatness | 0.076 mm (0.003 in.) | mm | |
| Clearance | Exhaust Valve Guide I.D. Max. Wear Limit | 7.159 | mm | 0.2819 in. |
| Clearance | Exhaust Valve Minimum Lift | 8.07 | mm | 0.3177 in. |
| Clearance | Exhaust Valve Stem-to-Valve Guide Running Clearance | 0.050/0.088 | mm | 0.0020/0.0035 in. |
| Clearance | Exhaust valve guide I.D. (max wear limit) | 7.159 mm (0.2819 in.) | mm | max wear limit |
| Clearance | Exhaust valve minimum lift | 8.07 mm (0.3177 in.) | mm | |
| Clearance | Exhaust valve stem-to-guide running clearance | 0.050/0.088 | mm (0.0020/0.0035 in.) | |
| Clearance | Exhaust valve stem-to-valve guide running clearance | 0.050/0.088 mm (0.0020/0.0035 in.) | mm | |
| Clearance | Governor cross shaft-to-crankcase running clearance, 6 mm shaft | 0.013/0.075 | mm (0.0005/0.0030 in.) | 6 mm shaft |
| Clearance | Governor cross shaft-to-crankcase running clearance, 8 mm shaft | 0.025/0.126 | mm (0.0009/0.0049 in.) | 8 mm shaft |
| Clearance | Hydraulic Valve Lifter to Crankcase Running Clearance | 0.0241/0.0501 | mm | 0.0009/0.0020 in. |
| Clearance | Hydraulic valve lifter to crankcase running clearance | 0.0241/0.0501 mm (0.0009/0.0020 in.) | mm | |
| Clearance | Intake Valve Guide I.D. Max. Wear Limit | 7.134 | mm | 0.2809 in. |
| Clearance | Intake Valve Minimum Lift | 8.07 | mm | 0.3177 in. |
| Clearance | Intake Valve Stem-to-Valve Guide Running Clearance | 0.038/0.076 | mm | 0.0015/0.0030 in. |
| Clearance | Intake valve guide I.D. (max wear limit) | 7.134 mm (0.2809 in.) | mm | max wear limit |
| Clearance | Intake valve guide I.D. (new) | 7.038/7.058 mm (0.2771/0.2779 in.) | mm | new |
| Clearance | Intake valve minimum lift | 8.07 mm (0.3177 in.) | mm | |
| Clearance | Intake valve stem-to-guide running clearance | 0.038/0.076 | mm (0.0015/0.0030 in.) | |
| Clearance | Intake valve stem-to-valve guide running clearance | 0.038/0.076 mm (0.0015/0.0030 in.) | mm | |
| Clearance | Nominal Valve Seat Angle | 45 | ° | |
| Clearance | Nominal valve seat angle | 45° | degrees | |
| Clearance | Piston Thrust Face-to-Cylinder Bore Running Clearance (New, Style A) | 0.039/0.082 | mm | 0.0015/0.0032 in. |
| Clearance | Piston pin O.D. (new) | 16.995/17.000 mm (0.6691/0.6693 in.) | mm | new |
| Clearance | Piston-to-piston pin running clearance | 0.006/0.017 mm (0.0002/0.0007 in.) | mm | |
| Clearance | Spark plug gap | 0.76 mm (0.030 in.) | mm | |
| Clearance | Valve Guide Reamer Size (0.25 mm O.S.) | 7.298 | mm | 0.2873 in. |
| Clearance | Valve Guide Reamer Size (Standard) | 7.048 | mm | 0.2775 in. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | API service class SJ or higher (including synthetic) | 1.6 L | Kohler oils recommended. Select viscosity based on air temperature at time of operation (chart). | ||
| Engine oil | API service class SJ or higher (including synthetic) | API SJ or higher | 1.6 L | Kohler oils recommended for best performance; select viscosity based on air temperature at time of operation (capacity is refill) | |
| Engine oil | API service class SJ or higher; viscosity per temperature chart | API SJ or higher | 1.6 L | Recommended Kohler oils; other high-quality detergent oils including synthetic acceptable. | |
| Engine oil | Kohler oils; other high-quality detergent oils including synthetic | API service class SJ or higher | 1.6 L | Select viscosity based on air temperature at time of operation: 5W-30, 10W-30, SAE 30 | |
| Engine oil | SAE 30 above 10°C (50°F); SAE 20 from -17.8°C (0°F) to 10°C (50°F); SAE 10 below -17.8°C (0°F) | 0.47 L | Wet disc type clutch oil splash lubrication; use 0.47 L (1 pt.) of motor oil of proper viscosity. | ||
| Fuel | 87 (R+M)/2 octane or higher; RON 90 octane minimum | Clean, fresh, unleaded gasoline. Up to 10% ethyl alcohol/90% unleaded acceptable; MTBE up to 15% by volume approved. Do not add oil. Do not use gasoline older than 30 days. E15, E20 and E85 are NOT approved. | |||
| Fuel | Clean, fresh, unleaded gasoline | Octane rating 87 (R+M)/2 or higher; RON 90 octane minimum | Gasoline up to 10% ethyl alcohol, 90% unleaded acceptable; MTBE and unleaded gasoline blend (max 15% MTBE by volume) approved; E15, E20 and E85 NOT approved; do not use gasoline older than 30 days | ||
| Fuel | Unleaded gasoline, 87 (R+M)/2 or higher; RON 90 octane minimum | Up to 10% ethyl alcohol; MTBE max 15% by volume | E15, E20 and E85 are NOT approved and should NOT be used; do not use gasoline older than 30 days. | ||
| Grease | Kohler 52 357 01-S (inertia drive) / 52 357 02-S (solenoid shift) starter drive lubricant; Kohler 25 357 12-S spline drive lubricant; Camshaft Lubricant Valspar ZZ613 (Kohler 25 357 14-S) | Lubricants/aids listed in Tools and Aids. | |||
| Other | SAE 30 above 10°C (50°F); SAE 20 -17.8°C (0°F) to 10°C (50°F); SAE 10 below -17.8°C (0°F) | -17°C to 10°C | 0.47 L | Wet disc type clutch; oil splash type lubrication; use motor oil of proper viscosity | |
| Other | SAE 30 above 10°C (50°F); SAE 20 from -17.8°C (0°F) to 10°C (50°F); SAE 10 below -17.8°C (0°F) | above -17°C | 0.47 L | Wet disc type clutch oil (0.47 L / 1 pt.) motor oil of proper viscosity per chart | |
| Other | SAE 30 above 10°C (50°F) | motor oil | above 10°C | 0.47 L | Wet disc type clutch oil splash lubrication; use 0.47 L (1 pt.) of motor oil. SAE 20 for -17.8°C (0°F) to 10°C (50°F); SAE 10 for below -17.8°C (0°F). |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Adjust Governed Idle Speed adjustment
Tools: Tachometer
- Hold governor lever away from carburetor so throttle lever is against idle speed screw.
- Start engine and warm up; adjust screw to approximately 1200 RPM.
- Release governor lever and check throttle lever is in idle position.
- Turn governed idle adjustment screw to obtain equipment manufacturer recommended idle speed (1500-1800 RPM).
- Move throttle lever to wide-open/full throttle and set high speed screw to intended no-load RPM.
Adjust Low Idle Fuel adjustment
⚠ Do not attempt to remove limiter caps.
- Place throttle control into idle or slow position; adjust low idle speed to 1200 RPM.
- Turn low idle fuel adjusting needle out (counterclockwise) until engine speed decreases (rich); note position.
- Turn needle in (clockwise); note position where speed decreases (lean).
- Set adjusting needle midway between rich and lean settings.
- Repeat for other low idle adjustment needle on two-barrel carburetor.
- Recheck/adjust low idle speed to specified setting.
Adjust Low Idle Speed (RPM) adjustment
Tools: Tachometer
- Place throttle control into idle or slow position.
- Turn low idle speed adjusting screw in or out to obtain 1200 RPM (± 75 RPM).
- Check speed using a tachometer.
Carburetor Low Idle Fuel Adjustment adjustment
⚠ Do not attempt to remove limiter caps.
Tools: tachometer
- Place throttle control into idle or slow position; adjust low idle speed to 1200 RPM.
- Turn low idle fuel adjusting needle out (counterclockwise) until engine speed decreases (rich); note position.
- Turn needle in (clockwise) until engine speed decreases (lean); note position.
- Set adjusting needle midway between rich and lean settings.
- Repeat for other low idle adjustment needle on two-barrel carburetor.
- Recheck/adjust low idle speed to specified setting.
Clutch Adjustment (wet disc type) adjustment
⚠ Do not attempt to pry or force spring lock away from ring.
Tools: large screwdriver
- Release clutch and remove nameplate. Using a large screwdriver, turn adjusting ring clockwise, one notch at a time, until firm pressure is required to engage clutch.
- After adjustment, engage clutch and check that rollers go over center to lock unit in engaged position and prevent releasing under load.
- If trouble persists after readjustment, clutch reconditioning is indicated.
Determining Camshaft End Play adjustment
Tools: camshaft end play checking tool, feeler gauge
- Install shim removed during disassembly onto camshaft.
- Position camshaft end play checking tool on camshaft.
- Apply pressure on checking tool (pushing camshaft toward crankshaft). Use a feeler gauge to measure camshaft end play between shim spacer and checking tool. End play should be 0.076/0.127 mm (0.003/0.
- If end play is not within range, remove checking tool and replace shim as necessary.
- Reinstall end play checking tool and recheck end play.
Digital Linear Actuator (DLA) Adjustment adjustment
Tools: Torque wrench
- DLA must be in fully retracted position during assembly.
- Loosen DLA mounting plate screws located on top of actuator plate.
- With throttle linkage centered in U-Clip or secured with retaining clip at end of DLA shaft, slide DLA bracket assembly back until throttle plate is fully open.
- Torque mounting plate screws to 2.5 N·m (22 in. lb.).
Governed Idle Speed Adjustment adjustment
Tools: tachometer, pliers
- Hold governor lever away from carburetor so throttle lever is against idle speed adjustment screw. Start engine and warm up, then adjust screw to approximately 1200 RPM using a tachometer.
- Release governor lever and check throttle lever is in idle position. Turn governed idle adjustment screw to obtain equipment manufacturer's recommended idle speed (1500-1800 RPM).
- Move throttle lever to wide-open/full throttle and hold. Turn high speed screw to obtain intended high speed no-load RPM.
Governor Initial Adjustment adjustment
⚠ Do not tamper with governor setting. Overspeed is hazardous and could cause personal injury.
Tools: Torque wrench
- Make sure throttle linkage is connected to governor arm and throttle lever on carburetor.
- Loosen nut holding governor lever to cross shaft.
- Move governor lever toward carburetor as far as it will go (wide open throttle) and hold in this position.
- Insert a long thin rod or tool into hole on cross shaft and rotate shaft counterclockwise (viewed from end) as far as it will turn, then torque nut to 6.8 N·m (60 in. lb.).
Governor Sensitivity Adjustment adjustment
- To increase sensitivity, move spring closer to governor cross shaft.
- To decrease sensitivity, move spring away from governor cross shaft.
High Speed (RPM) Adjustment adjustment
Tools: Tachometer
- With engine running, move throttle control to fast.
- Turn inner adjustment screw outward to decrease, or inward to increase RPM speed.
Ignition Module Air Gap Adjustment adjustment
⚠ Do not attempt to set the gap with a business card or folded microfiche card. Use the feeler gauge specified.
Tools: Feeler gauge 0.30 mm (0.012 in.), Torque wrench
- Turn flywheel magnet away from module position.
- Attach module to mounting legs, pull it away from flywheel, and tighten screws temporarily.
- Rotate flywheel so magnet is centered under module.
- Position a 0.30 mm (0.012 in.) feeler gauge between magnet and all three legs of module.
- Loosen mounting screws, allow magnet to pull module down against feeler gauge, and retighten mounting screws.
- Rotate flywheel to remove feeler gauge, position magnet back under module, and recheck gap minimum 0.28 mm (0.011 in.) under each leg. Torque screws to 4.0 N·m (35 in. lb.).
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
Which engine powers the Kohler CH18?
The Kohler CH18 is powered by the Kohler CH18-25 engine.
Troubleshooting
17Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Engine is hard to start | Fuel system related problem (fuel tank not filled with clean, fresh gasoline; blocked or improperly operating fuel tank cap vent; closed fuel tank shut-off valve; dirty or obstructed in-line fuel filter; fuel not reaching carburetor due to restrictions or faulty fuel lines and fuel pump; dirty air cleaner element or loose air cleaner element components) | Check the listed fuel system areas before adjusting the carburetor; it may be necessary to adjust or service the carburetor |
| Engine runs roughly | Fuel system related problem (fuel tank not filled with clean, fresh gasoline; blocked or improperly operating fuel tank cap vent; closed fuel tank shut-off valve; dirty or obstructed in-line fuel filter; fuel not reaching carburetor due to restrictions or faulty fuel lines and fuel pump; dirty air cleaner element or loose air cleaner element components) | Check the listed fuel system areas before adjusting the carburetor; it may be necessary to adjust or service the carburetor |
| Engine stalls at low idle speed | Fuel system related problem (fuel tank not filled with clean, fresh gasoline; blocked or improperly operating fuel tank cap vent; closed fuel tank shut-off valve; dirty or obstructed in-line fuel filter; fuel not reaching carburetor due to restrictions or faulty fuel lines and fuel pump; dirty air cleaner element or loose air cleaner element components) | Check the listed fuel system areas before adjusting the carburetor; it may be necessary to adjust or service the carburetor |
| MIL comes on | Problem or fault detected within the EFI system | Make initial checks in the listed areas; if these checks do not correct the problem, or the MIL remains on, further diagnosis and servicing by an authorized Kohler Engine Dealer is necessary |
| Engine is hard to start | EFI system problem (fuel tank not filled with clean, fresh gasoline or shut-off valve not opened completely; blocked or improperly operating fuel tank vent cap; dirty air cleaner element and precleaner or components not properly secured; improper, dirty, or obstructed fuel filter; loose connections to sensors, ECU, and fuel injectors; poor or discharged 12 volt battery) | Make initial checks in the listed areas; if these checks do not correct the problem, or the MIL remains on, further diagnosis and servicing by an authorized Kohler Engine Dealer is necessary |
| Engine runs roughly | EFI system problem (fuel tank not filled with clean, fresh gasoline or shut-off valve not opened completely; blocked or improperly operating fuel tank vent cap; dirty air cleaner element and precleaner or components not properly secured; improper, dirty, or obstructed fuel filter; loose connections to sensors, ECU, and fuel injectors; poor or discharged 12 volt battery) | Make initial checks in the listed areas; if these checks do not correct the problem, or the MIL remains on, further diagnosis and servicing by an authorized Kohler Engine Dealer is necessary |
| Engine stalls at low idle speed | EFI system problem (fuel tank not filled with clean, fresh gasoline or shut-off valve not opened completely; blocked or improperly operating fuel tank vent cap; dirty air cleaner element and precleaner or components not properly secured; improper, dirty, or obstructed fuel filter; loose connections to sensors, ECU, and fuel injectors; poor or discharged 12 volt battery) | Make initial checks in the listed areas; if these checks do not correct the problem, or the MIL remains on, further diagnosis and servicing by an authorized Kohler Engine Dealer is necessary |
| Will Not Start | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Hard Starting | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Stops Suddenly | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Lacks Power | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Operates Erratically | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Knocks or Pings | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Skips or Misfires | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Backfires | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| Overheats | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug | |
| High Fuel Consumption | Improper fuel; dirt in fuel line/system; dirty grass screen; incorrect oil level; engine overloaded; dirty air cleaner; faulty spark plug |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
4Step-by-step procedures compiled from the Kohler service manual for this model.
Parts
7| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 24 083 02-4 | Oil Cooler, CH25 | 1 | Oil cooler | buy |
| 24 083 03-4 | Paper Element, Heavy-Duty Air Cleaner | 1 | Paper element | buy |
| 24 083 05-4 | Oil Cooler, CH26 | 1 | Oil cooler | buy |
| 25 083 01-S | Outer Element, Heavy-Duty Air Cleaner | 1 | Air filter | KuduParts $19.00 |
| 25 083 04-S | Inner Element, Heavy-Duty Air Cleaner | 1 | Air filter | buy |
| 25 755 20-S | Cleanout Kit (Black) | 1 | Cleanout kit | buy |
| KO3226 | Electric Starter Service Kit | 1 | Battery | Amazon eBay |
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)Parts manual — kohler crankshaft reference manual tp-2179-b (Kohler)Service manual — 24 690 06 (Kohler)Service manual — 24 690 06 EN (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 Engine Owners - Service Manual (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)
This page was generated from the 17 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.