Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
riding mower won't start?
15.5 hp briggs single cylinder -new starter new battery and new battery terminals -wont even turn over like it should using my pickup battery from jumpers strait to the starter -but pull the plug and it will spin like their is no tommorrow
3 Answers
- 1 decade agoFavorite Answer
I would pull the head off of the engine and check for stuck valves. I bought a 12 hp motor from a yard sale for $1.00 and got it running within an hour.
It had the same problem.
Source(s): Experience - fenxLv 51 decade ago
It sounds like there is a problem with the compression. When you remove the plug, it spins freely. It could possibly be a stuck exhaust valve, or a component in the gear system that is malfunctioning that drives the valves. Try this: with the plug in, put Your hand over the exhaust pipe. Do you feel air coming out? If exhaust air is coming out, I would look at the starter again. Is it a reman? Some fail right out of the box!
Good Luck!
- renpenLv 71 decade ago
Compression has nothing to do with it. It is the starter. With the plug out you take the load off the starter and it turns the engine. Clean up the starter, put new brushes in it and it may fix it. New starters are a bit pricey. Pat's small engines.com has about the best prices.
