Old engine was #445677 with 6 pin connector. New engine connector plugged right in to connector on tractor. It has 5 wires in tractor side and 4 wires in new motor side connector, (1) is a jumper. Engine turns over fine, getting fuel, but will not fire.
Disconnect the kill wir see if it starts up
SOURCE: briggs and stratton quatum 5 hp lawn mower engine will not start
Sounds like your ignition timing. If the blade hit something solid while cutting it might have bent the shaft or sheared flywheel shear key. This is not hard to replace, just remove the engine cover and flywheel. If its not that, it could be inside the engine and that would be a bigger job Stephen.
Testimonial: "good info! thanks"
SOURCE: Still no fire , toro 8/32 briggs stratton engine snowblower
Repair Manual (Antique) - CE8069 for engines built prior to 1981
Point setting should be .020" after they are full open. I am nut sure that TDC will give full open.
Armature/coil air gap should be 'the thickness of the cardboard' of the box it came in.
*note: the coating on the wire from the coil to the points should be sanded off where they connect to the points.
The voltage coming from the coil is DC and may be as much as 8,000 to 15,000 volts. You WILL know it when it has spark, as in, you may have to change your underwear if it sparks and you are touching the end of the wire.
The 'afterthought' is that an electronic coil could have been mounted to eliminate the points to aid in a sharper spark and easier starting.
Final note: make sure all snwoblower frame wiring and switches are working correctly, as this can 'kill' the spark.
I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae
SOURCE: I have a 4 hp Briggs and Stratton engine - stops running with gas
01 Sounds like you are describing the primer as being on the front of the carburetor air filter body. The line you describe is probably used to force air from the primer into the carburetor or into the fuel tank (a box of metal about 6" long by 3" wide by 3" deep?) on which the carburetor body mounts, from your description.
02 The engine will shut down with a little bit of fuel in the bottom of that tank. You should be able to remove the fuel cap, located on the top of the tank, just to the left of the carb and see into the tank. The carb does draw fuel from this tank as it runs.
03 How long does it run before quitting? If it runs ok and you get a small yard done and the engine does not emit black smoke, that might be normal.
SOURCE: Engine will not fire {no spark }
Did you sand the rust off of the flywheel? where the magneto is. And did you set it right? It has to be real close to the flywheel. The thickness of two pieces of paper. And yes the pto switch will keep it from starting. If it is ingaged it wont start. Can you hear it enganging when you connect the battery? Try turning switch on and off see if it will kick in and out. With key on
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