Contact breaker gap? ML MCK1

Simon,

With all gaps and timing, we personally prefer to use trial and error. All mags are a little different, add that to the fact that most a pretty worn and it makes for a lot of variation.

Just my thoughts of course!

Regards

Chris Bedo Kent UK

I agree with Chris, especially as some magnetos in their dotage will not spark at all with the maker's gap, but will run happily for years with a reduced gap at both points and plug.

If it were me, I'd experiment with the gap at an event, as it will be a good opportunity to fiddle with carb and mag settings after it has thoroughly warmed through to get the best out of it. I had a great time with my P2 compressor at the Lister-Tyndale a couple of years ago, experimenting with plugs and carburetion, finally getting it to run very reliably on an extended nose NGK (BP6ES, I think) and a whiff of partially choked throttle. Whilst not compressing purposefully, it is VERY overcooled (hand on the barrel fins after four hours running indicates a pleasant warmth!) and a pale grey plug colour will do it no harm.

It was an interesting struggle as the inlet tract is so long that changes to the carb setting don't take place straightaway and it can take up to a minute to settle down again.

Regards,

Kim Siddorn,