Hi Bill,
It's been a long time time I have wired mine so forgive me if I lead you
astray. Could you clarify a few things.
- Has the standard Rotax probe been removed on one side or both?
- Are you monitoring all the head temperatures with the 10mm washer, or
do you have a combination of the standard probe + 10mm washer type.
If you are using a combination then I would expect them to be different,
one sits deeper into the head, the other sits on top of the head. I always
thought that it was off that Rotax only provided for monitoring 2 heads.
The sensors are thermistors but I do not recall they type. I know that
Grand Rapids used to sell the 10mm washer type at one time and Greg did
tell me what they were but I have forgotten (sucks to get old). GRT used
to be fairly responsive so if you do want to know what type of thermister
it is you might try contacting them.
Paul
On Thu, May 9, 2019 at 6:02 AM willydewey <willydewey@gmail.com> wrote:
>
> HI Guys
> I bought a 2004 Europa XS (914) from a UK builder who was a computer
> expert. Unfortunately he suffered a stroke and cannot converse on how he
> wired up the circuit. Recently the Grand Rapids EIS has been warning of a
> fault which has been traced to the CHT probes. These have been removed. The
> port side CHT is a probe in a dry socket. I believe this is a transistor
> type. The starboard CHT is a 10mm washer type, probably a K style
> thermistor 10mm dia fixed with a bolt.
> I dont understand why there is this variation and I would be grateful for
> advice what is correct and if possible the part numbers involved.
> Talking around I have been told that these CHT probes should be wired to
> the Rotax control box? but I can find no evidence of this.
> In the meantime I have disconnected the CHTs but run the risk of
> overheating should I loose the coolant. So help would be much appreciated.
> Regards to all
> Bill Dewey G-IANI
>
> --------
> Give a wise man knowledge and he will be yet wiser
>
>
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