Hey!!!! Dave will you where out playing with the goats yesterday I fixed the grand daughter's push mower. It was raining here as well, so I did some shop work.
To bring the guys up to speed on this old issue. My grand daughter has a push mower that has a B&S engine on it. She had it over speed a few weeks ago. She brought it to me to fix. The original problem was the little plastic air vane was broken so the governor could not work. I ordered a new one an installed it and then the thing would not start. Replaced the coil, new plug, checked and adjusted the valves, cleaned the carb. Still no fire. Checked it and it had good bright blue spark. Good compression too. It would not even run putting fuel into the plug hole. I posted on here for some ideas on the problem.
Solution: I marked TDC on the flywheel screen and made a mark on the shroud to line the flywheel mark up with. I then hooked my timing light up on it with a battery providing power to the timing light. I then cranked the mower over. It was firing about 45 degrees after top dead center. How could it do that??? The flywheel key was fine. I finally took a flywheel of another B&S motor I had here. Installed it and the mower started first pull. What the he!!. I took it back off and put the original back on it. Nothing still firing way late. So I put the other flywheel back on it and finished adjusting the carb. Grand Daughter came and got it this morning after church.
After lunch today I got to thinking about how the flywheel could be bad after being over revved. I got a magnifying glass out and looked it over real close. Two of the little fins in the magnet where gone. In bright light and with the magnifying glass you could see where they had been in the flywheel. The break point was shiny but back in the magnet 1/4 inch or so. The magnet was a little weaker then. I guess that changed the magnetic field enough to make it fire late.
First time I ever seen or heard of that happening. I broke the darn thing into pieces as it looked new and I did not want to get it mixed up with a good one. I should have kept it around to mess with some one with. LOL
So I got something productive done while Dave II was goat training. LMAO
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
