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Lamnmomer wont start .need to replace spark plug.need to know gap seeting for .my lawnmomer is a yardboy with briggs&stratton engine 6.5 -7.o hp

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Here are two things.

First the spark plug. Take the one that was in it to the where they sell small engine spark plugs in your area. The people working there will be able to easily match for the right one. As far as the gap goes, you can look at and find the manual for you mower, the gap setting should be in there.

Now for the not starting. If the mower is in good repair otherwise, I've found that most of the time if the mower has been sitting since last year, the gas has gone bad. You can usually tell by taking the cap off and smelling the gas in the tank. If it doesn't smell normal, you will need to drain the bad gas out of the tank -and the bowl of the carburetor. Most carb bowls can be drained by unscrewing the bolt in on the very bottom of the carb. Be careful, because a lot more gas then you think will drain out. Once that is done replace the bowl bolt and fill the mower with gas and try starting the mower.

Also, be sure to clean up all the gas that you spill on yourself and anything else before trying to start the mower!

Posted on Feb 26, 2009

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