[Fot] Anti Runon Valve ADU9535

[Kas Kastner]

In the olden days it was advised to reduce the idle rpm and that would cure
the problem, no valve, just a screw driver.

Never be beaten by equipment
 > Date: Mon, 6 Aug 2012 18:52:20 -0500
> From: cartravel at pobox.com
> To: FOT at autox.team.net
> Subject: [Fot] Anti Runon Valve ADU9535
>
> This question is not of interest to racers, but my street TR250 has had
> a problem with run-on or dieseling since leaded premium went away back
> in the 1980s.  This has continued through several carb rebuilds, many
> ignition configuration changes and recently an engine rebuild.  During
> recent rebuild, I tried to remove any sharp areas that might create hot
> spots and of course all the carbon has been removed, but the problem
> still persists.  There is additional tuning I should and will do such as
> carb rebuilds, carb needles, timing advance curves, etc., but I suspect
> this problem will continue.  The solution for later Triumphs and other
> British cars was the anti run-on valve.  It appears that the simplest
> retrofit would be to install a Rover/MG ADU9535 valve.  Basically, the
> valve opens when the ignition is turned off and floods the manifold with
> air making the mixture too weak to support combustion.  Where do I find
> one of these valves?  They do not appear to be available except on ebay.uk.
> Larry
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