Snapper NXT2346 Operater's Manual - Page 8

Electronic Fuel Management System The Electronic Fuel Management System monitors engine temperature, engine speed, and battery voltage to adjust the choke during engine starting and warm up. There are no adjustments on the system. If starting or operation problems occur, contact an Authorized Briggs & Stratton Dealer. NOTICE: Make sure to follow the steps below or the Electronic Fuel Management System could be damaged.  Never start the engine if the battery cables are loose.  Turn the key to the off position before disconnecting, removing and/or installing the battery.  Never use a battery charger to start the engine.  Never disconnect the battery cables while the engine is running.  When connecting the battery cables, first connect the positive (+) cable and then connect the negative (--) cable to the battery.  When charging the battery, turn the ignition switch to the off position and disconnect the negative (--) battery cable from the battery.  Do not spray water directly on the Electronic Control Unit. Carburetor Adjustment Never make adjustments to the carburetor. The carburetor was set at the factory to operate efficiently under most conditions. However, if adjustments are required, see a Briggs & Stratton Authorized Dealer for service. NOTICE: The manufacturer of the equipment on which this engine is installed specifies the top speed at which the engine will be operated. Do not exceed this speed. Note: Any of the oil drain plugs shown below may be installed in the engine. 2. After the oil has drained, install and tighten the oil drain plug. Optional Quick Oil Drain 1. Disconnect the oil drain hose (G, Figure 6) from the side of the engine. 2. Turn and remove the oil drain cap (H). Carefully lower the quick oil drain (I) into an approved container (J). 3. After the oil has drained, install the oil drain cap. Attach the oil drain hose to the side of the engine. Change The Oil Filter (if equipped) For replacement intervals, see the Maintenance chart. 1. Drain the oil from the engine. See Remove Oil section. 2. Remove the oil filter (C) and dispose of properly. See Figure 7. 3. Before you install the new oil filter, lightly lubricate the oil filter gasket with fresh, clean oil. 4. Install the oil filter by hand until the gasket contacts the oil filter adapter, then tighten the oil filter 1/2 to 3/4 turns. 5. Add oil. See Add Oil section. 6. Start and run the engine. As the engine warms up, check for oil leaks. 7. Stop the engine and check the oil level. It should be at the FULL mark on the dipstick. How To Replace The Spark Plug - Figure 5 Add Oil Check the gap (A, Figure 5) with a wire gauge (B). If necessary, reset the gap. Install  Place engine level. and tighten the spark plug to the recommended torque. For gap setting or torque, see the Specifications section.  Clean the oil fill area of any debris. Note: In some areas, local law requires using a resistor spark plug to suppress ignition signals. If this engine was originally equipped with a resistor spark plug, use the same type for replacement. for tion Inspect Muffler And Spark Arrester WARNING t c Running engines produce heat. Engine parts, especially muffler, become extremely hot. o Severe thermal burns can occur on contact. u Combustible debris, such as leaves, grass, brush, etc. can catch fire. N d  Allow muffler, engine cylinder and fins to cool before touching.  Remove accumulated debris from muffler area and cylinder area. o  It is a violation of California Public Resource Code, Section 4442, to use or r operate the engine on any forest-covered, brush-covered, or grass-covered land unless the exhaust system is equipped with a spark arrester, as defined in Section 4442, maintained in effective working order. Other states or federal p jurisdictions may have similar laws. Contact the original equipment manufacturer, retailer, or dealer to obtain a spark arrester designed for the e exhaust system installed on this engine. Exhaust system parts are installed by the equipment manufacturer. For specific R maintenance and replacement information, contact the equipment manufacturer.  See the Specifications section for oil capacity. 1. Remove the dipstick (D) and wipe with a clean cloth (Figure 6). 2. Pour the oil slowly into the engine oil fill (E). Do not overfill. After adding oil, wait one minute and then check the oil level. 3. Install and tighten the dipstick. 4. Remove the dipstick and check the oil level. It should be at the FULL mark (F) on the dipstick. 5. Install and tighten the dipstick. How To Service The Air Filter - Figure 8 9 WARNING Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.  Never start or run the engine with the air cleaner assembly (if equipped) or the air filter (if equipped) removed. NOTICE: Do not use pressurized air or solvents to clean the filter. Pressurized air can damage the filter and solvents will dissolve the filter. The air filter system uses either a flat or oval cartridge. Some models are also equipped with a pre-cleaner that can be washed and reused. Remove accumulated debris from muffler area and cylinder area. Inspect the muffler for cracks, corrosion, or other damage. Remove the spark arrester, if equipped, and inspect for damage or carbon blockage. If damage is found, install replacement parts before operating. Flat Air Filter 1. Remove the cover (A, Figure 8). 2. Remove the filter (C) and the pre-cleaner (B). 3. To loosen debris, gently tap the filter on a hard surface. If the filter is excessively WARNING: Replacement parts must be of the same design and installed in the same position as the original parts. Other parts may not perform as well, may damage the unit, and may result in injury. dirty, replace with a new filter. 4. Wash the pre-cleaner in liquid detergent and water. Then allow it to thoroughly air dry. Do not oil the pre-cleaner. 5. Assemble the dry pre-cleaner and the filter into the engine base (D). 6. Install the cover. How To Change The Oil - Figure 6 7 Used oil is a hazardous waste product and must be disposed of properly. Do not discard with household waste. Check with your local authorities, service center, or dealer for safe disposal/recycling facilities. Oval Air Filter 1. Remove the cover (A, Figure 9). 2. To remove the filter (B), lift the end of the filter. Remove Oil 1. With engine off but still warm, disconnect the spark plug wire (A) and keep it away from the spark plug (Figure 6). 3. Remove the pre-cleaner (C), if equipped, from the filter. 4. To loosen debris, gently tap the filter on a hard surface. If the filter is excessively dirty, replace with a new filter. 5. Wash the pre-cleaner in liquid detergent and water. Then allow it to thoroughly air 2. Remove the dipstick (D). dry. Do not oil the pre-cleaner. 6. Assemble the dry pre-cleaner to the filter. Standard Oil Drain Plug 7. Install the filter into the engine base (D) and push down until the filter snaps in place. 1. Remove the oil drain plug (B). Drain the oil into an approved container. 8. Install the cover. 8 BRIGGSandSTRATTON.COM