Fuel System Carburetor Servicing Carburetor is now disassembled for appropriate cleaning and installation of parts in overhaul kit. See instructions provided with repair kits for more detailed information. High Altitude Operation Engines may require a high altitude carburetor kit to ensure correct engine operation at altitudes above 1219 meters (4000 ft.). To obtain high altitude kit information or to fi nd a Kohler authorized dealer visit KohlerEngines.com or call1-800-544-2444 (U.S. and Canada). This engine should be operated in its original confi guration below 1219 meters (4000 ft.) as damage may occur if high altitude carburetor kit is installed and operated below 1219 meters (4000 ft.).
NOTE: Main and slow jets are fi xed and size specifi c and can be removed if required. Fixed jets for high altitudes are available. ● Inspect carburetor body for cracks, holes, and other wear or damage. ● Inspect fl oat for cracks, holes, and missing or damaged fl oat tabs. Check fl oat hinge and shaft for wear or damage. ● Inspect fuel inlet needle and seat for wear or damage. ● Inspect spring loaded choke plate to make sure it moves freely on shaft. 1. Perform removal procedures for appropriate air cleaner and carburetor outlined in Disassembly. 2. Clean exterior surfaces of dirt or foreign material before disassembling carburetor.
Remove bowl retaining screws, or solenoid assembly on most single cylinder engines, and carefully separate fuel bowl from carburetor. Do not damage fuel bowl O-rings. Transfer any remaining fuel into an approved container. Save all parts. Fuel can also be drained prior to bowl removal by loosening/removing bowl drain screw. 3. Remove fl oat pin (some carburetors may have a screw which requires removal), and inlet needle. Seat for inlet needle is not serviceable and should not be removed. 4. Clean carburetor bowl and inlet seat areas as required. 5. Carefully remove main jets from carburetor. For two-barrel carburetors, note and mark jets by location for proper reassembly.
Main jets may be size/side specifi c. After main jets are removed, on some carburetors, main nozzles can be removed through bottom of main towers. Note orientation/ direction of nozzles. End with 2 raised shoulders should be out/down adjacent to main jets. Save parts for cleaning and reuse. 6. Position of slow jet varies and is removable only on some styles of carburetors See correct illustration for corresponding style of carburetor showing location. (On two-barrel carburetors, slow jets may be sized to specifi c side. Mark or tag jets for proper reassembly. Note small O-ring on bottom of each jet.) Save parts for cleaning and reuse unless a jet kit is also being installed.
Clean slow jets using compressed air. Do not use wire or carburetor cleaner. 24 KohlerEngines.com 66 690 01 Rev. C WARNING Explosive Fuel can cause fi res and severe burns. Do not fi ll fuel tank while engine is hot or running. Gasoline is extremely fl ammable and its vapors can explode if ignited. Store gasoline only in approved containers, in well ventilated, unoccupied buildings, away from sparks or fl ames. Spilled fuel could ignite if it comes in contact with hot parts or sparks from ignition. Never use gasoline as a cleaning agent.