What make of motor and HP of mower motor?
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SOURCE: My lawn mower briggs & stratton engine 650 series will not start
check the fly wheel and coil it may have rust on it if so sand it off
SOURCE: Lawn Mower runs rough & dies has black sooty spark plugs
A good place to start would be to remove air cleaner assembly and give it a good wash and service and take a close look at choke assembly/lever to be sure it isn't sticking in on position, while trying to run it with air filter off..
SOURCE: Poulan 6.75 Lawn mower will not start
FOR SURE CHECK ALL PREVIOUSLY MENTIONED ITEMS , TRY THIS...ALMOST GUARANTEE IT WILL RUN............ REMOVE "ALL" OLD FUEL, REFILL WITH FRESH HIGHEST OCTANE FUEL. REPLACE SPARK PLUG (YES, EVEN IF IT LOOKS OK!) GAIN ACCESS TO CARB OPENING, REMOVE AIR FILTER..OR WHATEVER. USING SPRAY CARB CLEANER, FILL ENTIRE CARB AND FLOATBOWL WITH CLEANER....WAIT OVERNIGHT IF POSSIBLE..IT WILL EVAPORATE. NEXT DAY SHOOT MORE INTO CARB..GETTING ANY JETS, ORIFICES ETC..FILL FLOAT BOWL AGAIN. P.S. CLEAN OR REPLACE AIR FILTER IF NEEDED! WAIT A WHILE, GAP NEW SPARK PLUG, INTRODUCE APPROX. 1-2 OZ. OF FRESH GAS INTO PLUG HOLE...QUICKLY RE-INSTALL SPARK PLUG ..WITH ON/OFF SWITCH-BAR OFF..PULL OR CRANK ENGINE A FEW TIMES. MAKE SURE IGNITION CAN FIRE, CRANK(ELECT. START) OR PULL STARTER ROPE & MOWER SHOULD FIRE OVER. IF IT STARTS..RUNS..THEN STALLS (AFTER USING UP GAS IN CARB, TRY IT AGAIN. IF IT CONTINUES TO STALL QUICKLY...YOU WILL NEED AT LEAST A CARBURATOR REBUILD, OR IF NO START AT ALL..YOU NEED TO SEE IF PLUG IS FIRING.
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Thank you Philip I got it going watched a bit of you tube. Vince
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