Mower is a 22in. Poulan push mower model PO500N22S with the 500 Series 158CC engine Engine Family 9BSXS.1581VG
If you hit a brick with it you most like bent the crank shaft or maybe a rod. if it only tuns a lilltle bit then one of those componets are stopping it. take the blade off take the rip cord cover off hold a straight edge againts cranksaft have some one hand turn the fly wheel with cover off. if crank is bent the straight edge will show you. The shear pin should have gave way but if it didnt this will happen.Also pull plug out see if piston is moving during this process.
Usually the crankshaft is connected to the magneto with a shear pin, made of aluminum so the pin will shear rather than have the momentum of the magneto twist the crankshaft. But the fact that it locks up suggests something is out of alignment, at least. You might remove the sparkplug, rotate the engine with maybe a wire or other shaft in the hole to see if the cylinder goes up and down. That might help you discover if the pushrod is broken..
SOURCE: New mower 158cc Briggs & Stratton engine April 2010
Um if its new take it back before you damage the govenor then its not warrenty!!
the springs are fine. the metal the the spring conects to on the throtle control sets the high speed. dont play with unless you know what your doing for every ones safety
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
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SOURCE: Everytime I try 2 start the engine (pulling the
black smoke normally indicates exess fuel, try cleaning the air filter and replace the spark plug
that engine uses a fin style governor remove the upper cover and see if there is a nest or something holding the fins movement
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