Scott,
Glad to hear
you found your issues.
Putting a water
sensor on the tube is a GREAT idea!
With best
regards,
Mark
Skipper
Sailing Vessel
- Cream Puff - SM2K - #275
Currently
cruising - Tahiti, French Polynesia
www.creampuff.us
From:
main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On
Behalf Of Scott SV Tengah
Sent: Monday, November 2, 2020 8:48 AM
To: main@AmelYachtOwners.groups.io
Subject: [AmelYachtOwners] Just completed a 2900nm tough passage - two
little switches almost ruined my month: Bilge Float Switch and Volvo D3-110C
auxiliary stop
Hi all,
We just completed a 2900nm passage from Hawaii to French Polynesia with pretty
rough upwind/up current conditions for the first 10 days or so. Just a bit
longer than the Atlantic crossing but much more difficult, with days on end at
38-40 degrees apparent, bashing into current and waves. The second half was a
bit better, but two little failed switches almost ruined our trip.
1) The on-off switch for our bilge pump float tube failed. I presume it's the
original - 13 years old. Internally, it corroded and while it has been working
perfectly during our ownership until now, the resistance finally got high
enough that it didn't activate the bilge pump when the water level rose in the
gray water bilge. The quick connect tabs are not well sealed and I believe this
is how moisture gets into the switch.
The secondary bilge water level alarm on my A54 is located to port of the gray
water bilge. Because this was a hard upwind port tack, the gray water (and
saltwater from the anchor well and bow deck locker) pooled to starboard and
NEARLY SUBMERGED THE ALTERNATORS. I would guess another few hours or another
shower or two and it would have been an expensive problem.
I would suggest everyone check their bilge switches for resistance in the
"on" position. Ours was approaching 500 ohms. It's a bit of a custom
job, so you may want to plan on having a backup made or purchase one from Amel.
I also intend to install a water sensor on the float tube itself, in case we
ever find ourselves on another multi-day port tack upwind adventure with a dead
switch or bilge pump.
2) We have been having intermittent electrical issues with our Volvo D3-110C
where it would turn off randomly, generally with the helm display going blank.
Further, the Volvo displayed voltage was always 0.1-0.3v less than what we
measured at the engine-side battery cables and less than what was displayed on
our Onan remote panel. I believe I have found the problem and I believe
it's a design fault resulting from Volvo's adaptation of a car engine for
marine use.
On the starboard side of the engine lid/cover is an "auxiliary stop
button" that is normally closed and allows power to flow to the ECU. When
you press this button, it opens the circuit and depowers the ECU, turning off
the motor.
The problem is that this switch is not sealed and is in the path of the engine
room intake fan. That means salty air is blown onto it and since it's not
sealed, it will corrode internally over time. See attached photo. We had a
motor that would die randomly and had major difficulty starting up as we were
heading south from the doldrums into southerly winds. Not a great place
to have an intermittent motor.
After finding the problem, I simply butt connected the two wires leading into
the aux stop switch and if we can't find a SEALED replacement switch, we will
likely leave it as such. The aux stop switch is redundant there because you can
always remove the ECU blade fuse right next to this faulty switch.
I'd suggest owners of the D3-110 check resistance on their aux stop switch.
Also examine the quick connect spade connectors - both of mine were corroded
from the constant flow of salty air.
Hope this helps someone.
--
Scott
2007 A54 #69
SV Tengah
http://www.svtengah.com