CARBURETION Kerosene and Fuel Pumps

TM 5-4240-501-14&P CARBURETION Kerosene and Fuel Pumps To re-assemble filter, insert element into filter head with the round washer entering first. The gasket is put on the filter body. The spring is located in the filter body so that when filter body and head are put together, the spring will hold the element against the head. Tighten body and head with 75 foot lbs. (10.4 Kg/m, 8.5 N/m) of torque. After filter has been re-assembled to engine, the point at the gasket and other line connections should be checked with soap suds, with fuel turned on, to be sure there are no leaks. Fig. 111 - Element Assembly KEROSENE OPERATION Efficient engine performance will be obtained only when the following changes are accomplished: 1. A low compression cylinder head is required for models 23, 23A, 23C, 23D, 131400, 231000, 233000, and 243000. Other models may use two cylinder head gaskets. 2. A special spark plug - #291835 - must be used on models 23C, 23D, 233000, and 243000. Spark plug gap .030" all models. 3. A reduced breaker gap .015 is used on models 23C, 23D, 233000 and 243000. The engine must be retimed using the reduced breaker gap. Follow timing procedure in Ignition Section. Power loss will vary between 15% to 25% and fuel consumption will be approximately 15% less while running on kerosene. Fig. 112 through Fig. 115 illustrates various types of Briggs & Stratton combination fuel systems used. Due to the low volatility of kerosene, engines operated on kerosene-gasoline fuel systems can be started on kerosene only when the engine is at operating temperature. Cold engines must be started on gasoline, and switched over to kerosene operation only after warmed up. After warm-up and while operating on kerosene, adjust carburetor needle valves to a point where engine runs smoothest, and accelerates without hesitation when throttle is quickly opened. When shutting down engine, the carburetor must be emptied of kerosene so the engine can be started on gasoline when cold. Refer to Flo-Jet Carburetor for adjustment of carburetor and adjust carburetor while running on kerosene. Fig. 112 - Combination Fuel Tank Fig. 113A - Combination Fuel Tank Fig. 113B - Combination Fuel Tank, Carburetor 32