No spark

[Paden87]

What would cause a 4 stroke to not spark?

 

[carter]

Bad coil or low oil sensor could both cause that.

 

[Paden87]

I don't have the sensor hooked up must be the coil

 

[firemanjim]

I don't have the sensor hooked up must be the coil

You could have wired it back up wrong...... ?

 

[KartFab]

kill switch is set to "off"? check the easy stuff first

if there are any wires coming out of the coil, make sure they arent touching anything that is grounded to the engine.

 

[firemanjim]

Make sure the ceramic on the spark plug isn't cracked. If it is, it will not produce a spark...... Buy a new one.....

 

[mckutzy]

Equally speaking the air gap if set wrong will produce an insufficient spark.
More importantly what motor is this to speak of?

 

[OzFab]

What would cause a 4 stroke to not spark?

There really is a long list of possibilities; the best way is to start from the source... It would also help to know what engine...

 

[firemanjim]

http://www.diygokarts.com/vb/showthread.php?t=26695

 

[Paden87]

It's a honda gx 390 it has no kill switch right now I'm getting one tomorrow

 

[Paden87]

Firemanjim I am not using that clone any more I picked up a gx 390 yesterday for free from my dad

 

[Young One With A Manco]

Gran Pann: You have no idea how many times I pulled my motor at least 25 times before realizing I had the kill switch off...

 

[Poboy kartman]

Gran Pann: You have no idea how many times I pulled my motor at least 25 times before realizing I had the kill switch off...

How about forgetting to open the fuel petcock??????

......We have a 14 year old with senility issues! !!!!!!!!!

 

[Paden87]

The fly wheel pick up and the electrode thing are pretty rusty so I'm going to try to clean those to see if that helps and I now have a kill switch

 

[OzFab]

That could well be the problem but, if you still have trouble after you clean them (with a wire wheel or fine sandpaper only), disconnect the black wire from the coil...