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Re loosen the magneto place business card between mag. And flywheel retighten mag mounting screws remove business card shine up flywheel with sand paper with the mag off the motor clean rust off flywheel before remounting mag with business card.
all you need to set both points and mag spacing is a ole fashioned pack of matches , 1st remove matches from pack save one match , clean cut end!! with flywheel removed take out 5/32 screw on tin cover inside there will be points and condenser ,(if it's old model ) if not there will be a pick up coil and stator (finned lookin thing) take clean cut match Not the red end but the other end carefully move point arm away and put match in gap let arm go and slowly pull match out , use screw right next to it to adjust till match pulls out easyly with lil friction ! tighten all screws well install cover and screw for it , next obtain new aluminium shaft key , dont reuse old one , carefully install in key way and put flywheel down on shaft , tap once with a rubber mallet to seat it , install shaft nut and lock if it has one , unfold match pack all the way open hold with one hand in place where flywheel edge is flattest and carefully install magneto till it just rubs paper with a light skuff ,tighen all bolts well and install cover, start engine normally !! it should start right there if all your parts are good !! easy hah!!
How old is the engine? Does it have electronic ignition or points? Check the engine stop wire where it attaches to the throttle control on the engine. Make sure it is not grounding out. Has the magneto been removed? That is the Y shaped part behind the flywheel, where the spak plug wire attaches. If the mag has benn removed, it needs to be re-adjusted. The correct gap is .020 of an inch, about the thickness of a matchbook. This gap is measured between the two legs of the mag and the flywheel. I hope this helps, good luck.
Did you check the gap between the magnet on the flywheel an mag? Unplug the stop wire an see how that works. Sometimes the switch is bad. Are the magnets on the flywheel, did you set the gap on the flywheel to mag correctly? Did you do the simple thing an change the plug they go bad more than anything else.
Those sensors have no effect on spark. Did you replace the plug, if not remove it hold it against the engine, have someone pull cord, watch for spark. If you have spark then you have a fuel problem. If no spark then after replacing plug, then remove stop wire from magneto side. Pull cord an watch for spark. If no spark then remove housing an flywheel, measure gap between mag an flywheel. Check to make sure magnets are still on flywheel. Call some shop or check a service manual on gap setting. If no spark still you will need to replace the magneto. This is rare an its is more likely a plug that needs replacing. Toro snowblowers are nice machines, this is not a hard fix. Really to tackle this is starting with the plug.
gap needs to be 10 thousands of a inch done with a brass feeler gauge ..mag/flywheel has a spot with a magnetic field if you look you can see it it should make a 1/2 wrench stick to it if not replace mag/flywheel ..check key way also
if you have no spark check the contact between the flywheel magnet and mag and make sure they are clean and the gap is set ( old school the thickness of a cig. pack) if that doesn't do it check the wire and end for contact. Still no you probably need a new mag
The magneto is probably where the problem is. You'll need to pull the cover off of the motor and check the gap between the magneto and the flywheel. If the bolts holding the magneto have vibrated loose, the gap between the magneto and the flywheel will be incorrect. While you have the motor cover off, check the wiring to make sure you don't have a short in your ignition wiring and clean the air filter. I don't remember what the gap is between the flywheel and magneto, but .010 In. sounds familiar. Both legs of the magneto should be the same distance from the flywheel and they must not touch the flywheel at any point. I have used a matchbook cover between the flywheel and magneto while I tightened the magneto retention screws and it worked.
The gap should be about .010 (Ten Thousandths of an inch), but truthfully, the way I set it is to loosen the coil bolts and place a shiny business card in between the coil and flywheel. Tighten the coil up snug against the business card and then remove it. This should set the gap close enough to the correct setting for you; done. Hope this helps and best of luck to you. James
removw chop screen and blower housing unplug little wire under mag remove 2 screws and remove mag reverse prosess with new mag but pull mag away from fly wheel and snug screws center magnet on flywheel over legs of magneto place .010 feelre guage inbetween and loosen screws, hold mag against flywheel and tighten remove feeler guage reinstall kill wire on bottom of mag install blower housing and chop screen hope tis helps