Eike Lantzsch, ZP6CGE schrieb:
Hans-Joachim Sellner wrote:

bowgus schrieb:

The trim pot (alpha, starboard side) is very very easy to remove, degrease
:-), disassemble, reassemble and reinstall. I've done it but was not looking
at the range (I'm thinking it was not 270, more like 90-120). On mine, that
6 (8?) sided piece of &^%$# plastic insert had broken and therefore was
slipping. Maybe just pop it off and take a look for yourself ?

I don't run Mercruiser but BMW, I'm only interested in the technic of
this device, because my BMW-trim-sender is faulty with no chance to get
a spare part. So I'm looking what the competitors do ;-). Perhaps I can
rebuild it.
Thanks and bye, Hajo


Hajo:

On the Mercury Bravo Drive the sensor does not even have 90° angle
AFAIR. You can turn the sender around all 360° but the actual angle
for measuring is far smaller. I cannot look right now and the
installation we did was 1/2a year ago.
270° seems a bit exaggerated for a trim sensor. Is that
really necessary? Not even rudder angle indicators need 270°.
The Mercury Sender is not an ordinary pot. It is wire wound.
It is not very accurate but accurate enough. You can't use carbon
pots in vehicles or boats.

Maybe you might want to look for "VDO Oceanline Trim
Indicator" as well. You can download the information he
http://www2.vdo.com/vdo/end_consumer..._and_fza=_and_
childid=872_and_id=87200000.aspx
(Mind the linefeed after the "_" in the URL)
The distributor for VDO is MARX-Navigationssysteme in Hamburg,
Germany. They have a website too: http://www.marx-technik.de/
You might get a better price there than with your boat dealer.
We bought directly from Marx. They also have a good repair service.
Worked with them already in the 70s.

The VDO Trim Gauge is made for Mercury Trim Senders so it might
work for you to install the Mercury Sender. I doubt that the
VDO Sender is made by VDO. It does not appear in their catalogue.

Uh - you know all this already, I guess.
I saw your posts here - I realized a little late - it was you,
wasn't it?
http://www.dk-forenserver.de/boote/s...hp?s=0eb5c2aba
78c29d942145a5d2088141b&p=45514#post45514

Wish you luck.
Kind regards, Eike from Paraguay

Many thanks, that's really more than I expected!
Well, it's true, I don't need a potentiometer with a working-range of
270°. But commercial pots have this range only. I need a small fraction
of this, about 50 degree, as I wrote above. It's worth to know that
Mercruiser takes a wire wound pot, but on the other side I really wonder
that it turns all around. The mercruiser pot then should have 1,2KOhms
over 360 degree, provided they need a working range of 10 to 167 Ohms
(53 degree).
Anyway, I now know what's important: Wire wound, 360 degree (270 degree
is possible too, you must not turn it all around), and Mercruiser
measures on a small resistance area (fraction of one turn).

So far, thanks a lot!

Bye, Hajo