I have been given a push lawn mower with a 450 series Briggs and Stratton engine. It arrived in bits! What should the air gap be between the flywheel magnet and the coil armature? I'm getting no spark so its either the coil or the plug.
Use a business card. That's just about perfect for the gap.
Thanks jws1013. Turns out the armature is busted anyway so I’ll use that tip for the new one.
×
SOURCE: Craftsman 21'' Lawn mower won't start
In order for there to be a spark at the plug, make sure the plug is grounded to the engine, it will not "fire" if it isn't.
Remove the cover with the crankrope, there should be a thin black wire going to the coil, going to a ground lug that kills the engine. Try unplugging this wire and re-check the fire...if it fires, there is a fault in this wire and should be replaced. The mower will run without it, but will not stop without "choking" out the engine
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: where is the flywheel key on a briggs and stratton
You must remove the starter cover. Remove the metal shroud that includes the fuel tank. Tou will see the flywheel (it has a number of curved fins on the edge.)Remove the nut holding the flywheel and find one of the same thread size. Use the one you found and thread it on just a few turns. Take the edge of the flywheel in one hand and tap on the nut with the other using a hammer. You may have to rap sharply. Once the flywheel comes loose, pick it off of the engine and you will see the keyway on the top of the shaft. The key connects the flywheel to the shaft and will break if you hit something very strong. If you change the key and it starts running correctly and you had hit something prior to the break, CHECK THE BLADE...Good luck...Lee
SOURCE: A briggs and stratton 450 series 148cc on a moter
More than likely, it is the main jet is partially clogged. That is the brass bolt that holds the float bowl onto the body of the carburetor. Remove this bolt and washer and clean it well. Use no metal objects to clean it.. Make sure the bottom hole and the side holes near the top are clean and clear.Carb/choke aerosol spray should do the job here. Use no metal wires or scrapers on the jet. Clean until shiny, reinstall and try starting the machine.
SOURCE: I have a Briggs & Stratton 500 series push lawn
Hi and welcome to FixYa, I am Kelly.
When a primer bulb is slow to return to a static conditon there is a restriction in the fuel supply. Since this carb is mounted directly on top of the fuel tank the troubleshooting for this involves removing the gas tank and carb as an assembly from the engine. Remove the end bolt and then the side bolt spacer that is just above the tank. Be careful or the spacer will drop. Pull out on the tank until it slides off of the intake. When the tank is free of the engine tile the bottom of the tank toward you and disconnect the throttle linkage. NOTE the hole the linkage is connected to! Set the tank on a flat surface and remove the carb mounting screws. STOP! Do not lift the carb off of the tank until your sure that the gasket and diaphragm are not stuck to both mounting surfaces. You may have to carefuly slide a thin knife blade FLAT across the top of the tank to free the carb from the tank. There will be a SPRING on the bottom of the cabr also. Do not lose this spring and ensure you see how it is installed! Once the carb is free of the tank clean the screen under the carb and the carb with carb cleaner. Reassemble carb to tank. Fill tank with gas and re-check primer bulb BEFORE you reinstall the tank and carb on the engine. If it still does not work.. properly you need to clean the passages again. Worst case you remove the primber bulb to see if there is debris inside the bulb plunger area.
Installing tank and carb to engine....
Tip the bottom of the tank toward you.. connect the throttle linkage, watch the o-ring that is in the carb intake sealing area and make sure it seals. Install side bolt and then the end bolt.
Just back tracking here.. I have determined this is most likely a 11A-B04E000 Yard machine with a 5.0 Hp engine... (
Briggs and Stratton refers to this engine as the 10T500 series.
ENGINE Parts list is here:
http://www.brandnewmowers.com/pdf/11A-104B090EIPL.pdf
Thanks for choosing FixYa,
Kelly
.
1,217 views
Usually answered in minutes!
×