Well, new news. The thruster is fine, it is the control panel that is bad.
Not
a normal DC motor. Control does not just switch the polarity of the power
to the motor. Motor has 1 black wire (ground) and 3 red wires. Two of the
red wires connect to the relays in the module with one or the other
energized
depending upon direction. Not sure what the 3rd red wire does but it
connects
to the module via a separate lug. I can just short the lines at the control
panel
to activate the thruster. I can replace it with a SPDT switch if I want.
Hopefully
I can find a panel for not too many bucks.

Incidently, anybody know what type of oil this thruster uses? Looks pretty
light but I haven't a clue. No manual came with it.

Thanks to all that contributed!
Doug
s/v Callista

"Larry" wrote in message
...
"Doug Dotson" dougdotson@NOSPAMcablespeedNOSPAMcom wrote in
:

I'm an EE. I know how it works. Just looking for advise on the symptoms
vs which failed component on this particular unit.


Geez. Now I'm wondering why the "module" hasn't been properly redesigned
with non-proprietary parts easily obtainable anywhere on the planet.....

Just jumper out the module's power wiring and see if it runs in both
direction. Scrap the crappy module and put a couple of simple relays
(weatherproof would be nice) from Grainger's Supply in its place....

Of course, this is why EEs are always in the company of ETs to make the
design actually WORK....(c

--
Larry