Ray,
I don't quite know how to say this without sounding offensive, so with that
caviat, I'll continue. One must be very careful here. Apparantly there are
different voltage models of the XR700 Crane Ignition.
In a Warning message included in the leaflet that came with mine, it says
that the 12 Volt models won't adapt to positive ground, but the 6 Volt ones
will. And the instructions in the flyer clearly state that the power leas is
to be connected to 12V. (They recommend a direct connection to the battery).
Joe Curry
r-james@tamu.edu wrote:
> The real issue here is not the voltage applied to the coil,
> but the input voltage applied to the Crane unit. My crane unit (on
> 1500 cc Midget; same engine) requires 6V, not 12 V, which is
> not very clear from the instructions which serve to confuse the issue
> with the language Charlie quotes above.
>
> If the Crane unit is powered by the 12 V input, it will run fine--
> for about 5 months, at least in my experience. My unit is now
> driven at 6 V, by the use of the ballast resistor, and it has been
> trouble-free for probably two years.
>
> I suggest to anyone who has installed a Crane unit, and had questions
> about the ballast resistance language, that you should reread the
> ambiguous directions with my interpretations in mind, and if you
> are running a crane unit at 12 V, rewire it for 6 V. If the Crane
> unit is too hot to put your hand on it while operating, there is
> something wrong, and you can expect a premature failure.
>
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