Ok, after try a lot of different things I note that it doesn't spark when cold, but using a little bit of starting fluit start right away and then the spark is very strong, if somebody have any idea i'll apreciate.

 

I must admit I am a little confused as to your problem. Starter fluid is used as a fuel, but you are saying there is no spark. Can you be a little more specific (ole country boy here) as to your testing procedures please?

also...

How many miles does it have?
What type of maintenance has been performed?