Re: no 2 cyl not firing when plug is fitted

Posted by Rich Ard on Dec 27, 2012; 8:50pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/no-2-cyl-not-firing-when-plug-is-fitted-tp4034351p4034362.html

Lucky 1 wrote

Do not even use that method.

Just clip a timing light onto that spark plug wire when it is IN the engine,
 and watch for the flash of the timing light.

Just because you cannot see a spark does not mean there is none.

I've seen this suggested here a couple of times - to use a timing light rather than pulling the plug - why would you do it that way rather than check with the plug itself? I expect to see a fat blue spark and wouldn't have it any other way. :)