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View Full Version : 12 hp Briggs and stratton won't start


Jmart88
Jul 26, 2012, 07:11 PM
I have a craftsman lawn tractor that was given to me when I got it it wouldn't run so I ran some tests and found that the carb was very green and dirty so I replaced the float bowl, needle , gaskets , nozzle etc. Also replaced filters and fuel line after words it fired right up ran great I parked it in the garage and the next mourning it wouldn't start.. I went out and bought a brand new battery today installed it and it fired right up again! Left it maybe 2 hours and now it don't start I mean nothing seems like the battery's dead. Any ideas tips please help

joey4029
Jul 27, 2012, 03:40 PM
I have a craftsman lawn tractor that was given to me when I got it it wouldn't run so I ran some tests and found that the carb was very green and dirty so I replaced the float bowl, needle , gaskets , nozzle ect. Also replaced filters and fuel line after words it fired right up ran great I parked it in the garage and the next mourning it wouldn't start ..I went out and bought a brand new battery today installed it and it fired right up again! Left it maybe 2 hours and now it don't start I mean nothing seems like the battery's dead .? Any ideas tips please help

Try the safety switch under the seat,or
A bad/loose terminal,or
You left the lights /key on somehow and the battery really is dead

Jmart88
Jul 27, 2012, 06:16 PM
Tractor will start if the battery is fully charged I started it up with the fully charged battery left it for an hour came back and nothing no juice in the battery what else could it be the key was off?? Help

joey4029
Jul 28, 2012, 09:20 AM
Fully charge battery.. water level OK?
Then start it up
Then shut off
Then unhook battery
Then come back in an hour hook up battery
,see if still starts,and I'm thinking it won't

Just because the battery is new ,it doesn't mean it is any good


Also,maybe a defective solenoid ?
Are you sure the battery is dead afrer an hour?
Try tapping on the start solenoid with a screwdriver

Jmart88
Jul 29, 2012, 08:44 AM
Ok so after starting the mower I in hooked the battery waited till the next mourning and it started right back up water level and battery are good. Also just changed the fuse and fuse holder?? Solinoid how can I test that

Dr_Spa
Jul 29, 2012, 10:44 AM
Sounds like an electrical short, grounding out the battery, causing it to drain it's charge.

Jmart88
Jul 29, 2012, 11:49 AM
An electrical short? That makes sense so I should go threw all my wiring and connections and also check the starter brushes?

Jmart88
Jul 29, 2012, 09:26 PM
There is a small black wire shorted that comes from the fly wheel this was the problem where is the wire going? To the magnet? Thanks for all the replies huge help!