Correct gap for spark test?

[Old No 7]

I think I have a weak coil. I have a spark tester, and have researched this on the forum, but I am confused. I have seem posts with recommended gaps of 3/8" 7/16" and 1/2". What is the correct gap? Does it matter?<br /><br />I understand i am looking for a bright blue spark and a loud snap, I'm just not sure about the gap.<br /><br />In case anyone is looking for one, I found this adjustable spark tester for $8.37 at www.toolparadise.com here is the link:<br /><br /> http://search.cartserver.com/search...abase&maxhits=30&keywords=thextron+404&go=GO!

 

[Goodoleboy]

Re: Correct gap for spark test?

Hi #7!<br /><br /> usually they say 7/16. But Ive read that some of the older motors like early bigtwins. That 1/4 mabey 3/8 is the best that can be done. Something about the electronics not being as good as the modern units.<br /><br />Good luck!

 

[Old No 7]

Re: Correct gap for spark test?

I knew I forgot something! <br />The motor is a 1989 88HP Johnson. Does that fall into the older motor catagory, or should i go with the 7/16?<br /><br />Thanks Lee!

 

[angus63]

Re: Correct gap for spark test?

Hey neighbor<br />7/16 is your goal for that ignition.<br />Good luck

 

[BoatBuoy]

Re: Correct gap for spark test?

When Goodoleboy mentioned the older motors, I think he was talking about those that used conventional magnetos for spark inducement. Yours is a CD ignition and should produce a very good spark.