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Could a slipping blade on a pusher damage the flywheel key? I parked a 3.5 (959J02) that was running fine. Later, it was really hard to start, ran rough, and knocked. Sure enough the flywheel key is bent. Also, the blade slips enough to rotate it on the crank by hand pretty easily. I've...

I have an old Murray push with a Briggs 95902, 1992 vintage. The starter pulley wore out where the recoil spring goes in, causing the spring to come loose and get scrambled up in its housing. I found a new spring and pulley, but can't get the spring to stay seated in the shroud. I can't find...

I read a few days (*cough cough*) ago that it was good to oil the sponge air filter on a lawn mower (read "Briggs & Stratton 3.5 hp") with motor oil. I tried this once or twice and the air filter clogged pretty quickly. I brought one filter in to a shop (yeah, days and days ago ago) to get a...

I found an article on Wikipedia (Paschen's Law) which says (in a very confusing way) that the breakdown voltage of an air gap is a function only of air density and gap length (specifically, the product thereof). So, if you are comparing the ability to get a spark (achieve breakdown voltage over...

With advice from Scrubcadet10 I got a 16 year old Briggs 3.5 running. It clattered very steadily and very loudly. I replaced some oil with motor honey, no change. I assumed the rod was knocking and figured I'd beat my money's worth out of it and started mowing. About an hour in, the clatter...

I have two push mowers made in 1992 and 2005 that have the old B&S Classic 3.5 HP engine. My last ignition coil finally failed, and after a dozen hours of searching I can't find a part number. Not even B&S seems to know these engines existed, although millions of them were built. The engine...