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manual abstract
If muffler is equipped with spark arrestor screen, remove screen for inspection. Replace screen if damaged or plugged. WARNING AIR COOLING SYSTEM We recommend that after every 100 hours you have an authorized Briggs & Stratton Service Dealer clean the air cooling system. CLEAN AREA OF ALL DIRT AND DEBRIS COMBUSTION DEPOSITS We recommend that after every 100-300 hours you have an authorized Briggs & Stratton Service Dealer remove combustion deposits from the cylinder, cylinder head, top of piston, and around valves. ADJUSTMENTS ADJUSTMENTS CONTROL ADJUSTMENTS TO ADJUST REMOTE CHOKE WARNING Prevent unintentional starting. Before performing adjustments: • Remove spark plug wire from spark plug. • Disconnect battery at negative terminal (only engines with electric start). TO ADJUST REMOTE THROTTLE If the engine does not start or if it runs roughly, the remote throttle control may need adjustment. See your authorized Briggs & Stratton dealer or follow the instructions below. [1] Move remote throttle control to FAST position. [2] Hole in governor control lever (located just behind governor control plate) must align with hole in governor control plate, as illustrated above. [3] If holes do not line up, loosen casing clamp screw and then move governor control rack until it does. [4] Tighten casing clamp screw. [5] Check operation of throttle. Move throttle control to STOP position. [6] Governor control lever must make good contact with stop switch (if equipped). Readjust if necessary. HOLE IN GOVERNOR CONTROL PLATE GOVERNOR CONTROL LEVERSTOP SWITCH GOVERNOR CONTROL RACK CASING CLAMP SCREW [1] Hold choke control to CHOKE or START position. [2] Loosen casing clamp screw. [3] Pull casing, wire and choke lever in direction of arrow to end of travel. [4] Tighten casing clamp screw. CASING CLAMP SCREW CARBURETOR ADJUSTMENT WARNING The manufacturer of the equipment on which this engine is installed specifies top speed at which the engine will be operated. DO NOT EXCEED this speed. Differences in fuel, temperature, altitude or load may require minor carburetor adjustment. Air cleaner and its cover must be assembled to carburetor before starting engine. The carburetor on this engine is equipped with an idle mixture valve with a limiter (see inset), which allows some adjustment, and an idle speed adjustment screw. TO ADJUST CARBURETOR IDLE MIXTURE VALVE WITH LIMITER CARBURETOR THROTTLE LEVER IDLE SPEED SCREW [1] To adjust idle speed, start engine and warm up about 5 minutes. [2] With engine running, place equipment throttle control in SLOW position. [3] Rotate carburetor throttle lever against the idle speed screw and hold it. Turn idle speed screw to obtain 1750 rpm (use a tachometer). [4] Then rotate idle mixture valve full travel clockwise and then counterclockwise. Note: DO NOT remove limiter caps. DO NOT force beyond limits. [5] Then, position idle mixture valve in middle of travel. [6] Check idle speed. Re-adjust to 1750 rpm, if needed. [7] Move throttle control to FAST position. Engine should accelerate smoothly. If it does not, adjust idle mixture valve counterclockwise 1/8 turn. Note: Engines operated at approximately 3000 to 5000 feet (900 to 1500 meters) above sea level may require a high altitude carbur...
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