Category Archives: Upgrade

Repairs and Errands in Norfolk, Virginia

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Sunrise on Tuesday, July 1

On Tuesday morning, Eric went back to the hydraulic store in Portsmouth to exchange the fittings. He found fittings with angles that would work better in the space we had. Upon return, he finished installing the transfer pump. Much to his aggravation, one of the fittings was leaking. It was too hot to keep working in the engine room, so he gave up for the day. 

On Wednesday morning, Eric took apart, tightened and resealed both fittings on the fuel transfer pump. Since the transfer pump had fuel in it, it was messy. He captured the majority of the fuel in a bucket and used the oil pads (AKA diapers) to suck up the rest. In great news, it wasn’t leaking anymore! He started the transfer pump and it worked! Woo hoo!

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Replacing The Alternator Regulator

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As you may recall, in Panama, we had a catastrophic failure of our ARCO Zeus alternator regulator. The summary was that there was a mandatory software update, and the update caused the unit to malfunction and over voltage our main 12-volt electrical system. This caused our battery manager, in an effort to protect the batteries, to disconnect 12v power from the boat. Without the 12v power we lost radar, charts, GPS, lights, and various other systems. We also had a fire suppression system that shut down the main engine because it thought the loss of power was due to fire. Ouch. Fortunately, the failure happened someplace where we were not in danger, but that was mostly luck. Had we been someplace else when the boat suddenly stopped operating, we likely would have crashed into something. We also had enough emergency and backup systems that we were able to quickly gain control of the boat (we literally had a back up propulsion engine, as well as three other batteries banks to power the boat).

To continue cruising, the temporary solution was running the generator to power the batteries instead of using the main engine alternator while underway.

The company who installed the upgraded battery system, including the alternator regulator, was Weber Marine. Even though we in no way blame Weber for the situation, they covered replacing the ARCO Zeus as part of their warranty on their work.

David from Weber Marine flew in on Sunday, June 8 so that he could start work on Monday morning. When we’d scheduled this trip, Kosmos was supposed to already be back in the water and thus the A/C working. Having to do this project on the hard with no A/C was painful. Also, the yard hours were limited, so Eric and David couldn’t come in early to work during the coolest part of the day.

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Lunch at Xuma’s, Highbourne Cay, Exuma Islands, Bahamas

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Continued… When Christi and Keith returned to the dinghy dock, they saw that Kosmopolitan wasn’t there. They walked out to the southwest edge of the marina to watch for Eric’s arrival. Looking north, we could see the marina, the little shallow bay next to it, and the sea wall that separates them. The marina was clearly a dredged portion of the little bay.

Looking south, we could see that the beach on between Xuma’s and this point was lined with chairs.

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Snorkeling in Elizabeth Harbour, Exuma Islands, Bahamas

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Friday, March 21 — The Nordhavn 68 in this photo was named Stella Luna, and we got this great shot of her under the brightly glowing, half-full luna at dawn.

Like yesterday, the wind was low and the bay was calm, so after we finished school and chores, we headed out to go snorkeling with some other families. Our rendezvous spot was at the southwestern tip of Stocking island.

As we had briefly mentioned back in December, we (relatively) recently upgraded our dinghy. We’d had a Gig Harbor hard shell sailing/rowing dinghy with a Torqueedo 503 electric motor with 1.5 horsepower. We also had 50-watt solar panels to charge the motor when we had it out, which were made by Torqueedo. We were very happy with those solar panels.

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ARCO Zeus Endangering Critical Failure

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Note: Christi normally writes the blog posts, however, since this is a boat technical post, Eric has authored this one.

Tuesday, February 25: We rolled out of bed at 0400 and did all the last minute things we always do before going to sea. Our first inkling that something could be wrong came at about 0530, when I turned on the main engine to warm it up. Before we get into the details, here is some important background information:

While underway, electricity to charge the batteries for Kosmos is made from an alternator on the main engine. It is an important system, and having electricity from the main engine allows us to run all the boats systems without running the generator. While underway, the boat uses quite a bit of electricity for air circulation, navigation/radar, and all the usual loads (refrigeration, freezer, lights, Internet etc.).

The main engine alternator is externally regulated by a product from ARCO called Zeus. External regulation is a general practice for interfacing with Lithium Iron Phosphate (LiFePo) batteries, which was part of the upgrades made to Kosmos after we got back from the Sea of Cortez. Zeus has an app and can connect via Bluetooth for configuration and monitoring. Mainly, it can reduce the load on the alternator ensuring it does not overheat. The Zeus box has several sensor wires for temperature, RPM, voltage, ignition, regulator control, etc.

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