[T2] re recalcitrant motor

[Robert Mann]

	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
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