Fuel System CARBURETOR Engines in this series are equipped with emission compliant fi xed main jet carburetors, manufactured by Keihin. All have self-relieving chokes for effi cient operation. Depending on specifi cations and application involved, most will also contain a fuel shut-off solenoid and an accelerator pump. Troubleshooting Checklist When engine starts hard, runs rough, or stalls at low idle speed, check these areas before adjusting or disassembling carburetor. 1. Make sure fuel tank is fi lled with clean, fresh gasoline. 2. Make sure fuel tank cap vent is not blocked and is operating properly. 3. Make sure fuel is reaching carburetor.
This includes checking fuel shut-off valve, fuel tank fi lter screen, in-line fuel fi lter, fuel lines and fuel pump for restrictions or faulty components as necessary. 4. Make sure air cleaner base and carburetor are securely fastened to engine using gaskets in good condition. 5. Make sure air cleaner element (including precleaner if equipped) is clean and all air cleaner components are fastened securely. 6. Make sure ignition system, governor system, exhaust system, and throttle and choke controls are operating properly. Keihin One-Barrel Carburetor Components 66 690 01 Rev. C KohlerEngines.com 21 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.
B A C D O E F G H I L M K N J U S Q R W S V P T A Carburetor Upper Body (Choke) B Self-relieving Choke C Body Gasket (Formed Rubber) D Slow Speed Jet E Inlet Needle Valve F Clip G Float Pin H Float Assembly I Carburetor Lower Body (Throttle) J Main Jet K Idle Fuel Adjusting Needle L Solenoid Seat M Fuel Shut-off Solenoid N Idle Speed Adjusting Screw O Jet (Accelerator Pump Carburetor only) P Accelerator Pump Cover Q Diaphragm R Diaphragm Spring S O-ring T Rubber Boot U Bushing V Return Spring W Accelerator Pump