[T2] re recalcitrant motor

[accessys at smart.net]

very true and have done that but is next one my list for next decent day. 
cold and wet today

Bob

On Wed, 18 Nov 2015, Robert Mann wrote:

> Date: Wed, 18 Nov 2015 21:04:42 +1300
> From: Robert Mann <robtmann7 at gmail.com>
> To: VW type 2 late aircooled <type2 at type2.com>
> Subject: [T2] re recalcitrant motor
> 
> 	I can think of 2 further possibilities.
>
> 1  Just because you copped a jolt from your ignition system does not prove 
> the spark is strong enough for ignition.  A spark out in the air has to be 
> blue, and a fairly loud 'snap', if it is to ignire mixture at several atm in 
> the cyl.
>
> 2  I have recently seen 2 examples of dud spark-plug shrouds or caps or 
> whatever you call them.  One of our most famous racers, the late Len Perry, 
> was forced to retire from a big race at Ardmore by his Manx spark-plug cap 
> going open.  That failure is ruled out by the std method of laying the plug 
> on the head (or other well-earthed bare metal), and then seeing & hearing the 
> spark with the plug-shroud on the plug.  But checking the apark further back 
> in the 'HT supply chain' will not allow detection of a bum shroud.
>
>
> -- 
>
> L. R. B. Mann  M.Sc  Ph.D
> applied ecology
> 22a Ardern Ave.
> Stanmore Bay, Whangaparaoa 0932,
> NEW ZEALAND
> (9) 424 0808
> my direct line 972 5029  -  a Hibiscus Coast and  Auckland number
> http://www.kuratrading.com/HTMLArticles/writings.htm
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