View Full Version : I have 18 hp briggs and staton craftsman tactor will crank but won't stat there is no
shirleyb1968
May 17, 2010, 11:30 AM
The tractor cranks but it does not spark put a brand new coil pack on and it didn't help I have it sitting in my work bench.I hooked up a battery starter to it to see if it had spark but it doesn't all it does is crank.the coil tested good.last time it ran my kids blew the mwer deck off and ever sice then it won't start.it did blow the fuse though after that.and there was smoke that came out behind the flywheel and suggestions
ballengerb1
May 17, 2010, 11:34 AM
Pull the plug, reattach the spark plug wire, ground the plug to the engine. Now turn your key does the engine turn over and do you see a spark at the plug tip. If so, what color is the spark
shirleyb1968
May 17, 2010, 11:46 AM
I did that and there is no spark I already tried that my husbandhas the motor out of the tractor sitting on the work bench he used a battery starter to crank and thees nothing
Sounds like the diodes going to the coils are blown.
shirleyb1968
May 18, 2010, 12:47 PM
Where are the diodes located
Under the engine blower housing they run to coil.
jsfocke
May 19, 2010, 07:41 PM
The kill wire on the coil could be grounding it out. If you unplug the small black wire from the coil does it spark then?
shirleyb1968
May 22, 2010, 10:07 AM
The black wire isn't hooked up. Is it near the alternator under the flywheel the diode.
shirleyb1968
May 23, 2010, 12:54 PM
The kill wire on the coil could be grounding it out. If you unplug the small black wire from the coil does it spark then?
Please help still no luck the black wire isn't hooked up
jsfocke
May 23, 2010, 02:21 PM
If the black wire is unhooked from the bottom of the coil the only other things that should cause it not to spark is a bad coil, a coil that is not gapped properly or too much rust on the coil or flywheel.
shirleyb1968
May 28, 2010, 08:53 AM
Thecoil is new and we used a business card to gap the coil the flywheel we cleaned off
jsfocke
May 28, 2010, 01:25 PM
Well, you've got me...
The contacts on the flywheel and the coil are the only thing besides the coil itself that produce the spark. The little wire that plugs onto the coil is what shuts it down to kill the engine. If it is not even plugged onto the coil it can't be effecting it. You are sure that you have the coil mounted correctly? It can be mounted upside down... I assume that you are unplugging your spark plug and using a screwdriver or a spark detector to make sure that you have spark.. A bad spark plug could make it seem like the coil isn't working. If you are using it and grounding the tip to see if you have spark I think I would remove the plug and use the ol screwdriver method to be sure. If none of this produces a spark then I would say you just got a bad coil. Even if you had sheared a flywheel pin or something more serious you would still get spark. It would just be at the wrong time.
shirleyb1968
May 31, 2010, 08:45 AM
No it is not sparking what should the spark plugs be gapped at.I have them gapped at .30 is that right.
25 -30 is good
Do you have all the wires unhook from the coil.if so and no spark has to be a bad coil,
shirleyb1968
May 31, 2010, 11:38 AM
I am getting a very weak spark is that the coil it is a brand new one
Nothing pluged into the coil.
Make sure the wire is unpluged at the coil
shirleyb1968
Jun 13, 2010, 09:29 AM
The coll pack was bad it is running now
jsfocke
Jun 14, 2010, 05:21 AM
The coll pack was bad it is running now
With the info you gave us that was the only thing that made sense. Glad you got it running.