Category Archives: Upgrade

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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Passage from Bahia de Navidad to Puerto Chiapas – Day 5

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Wednesday, December 25 — The worsening of sea conditions that happened late on Tuesday night didn’t last long. During the wee hours of the morning, the wind calmed down, the lightning vanished, and the sea conditions began to slowly improve. By morning, the ride was calm and pleasant. The swells were probably about three feet with long intervals, coming from two directions, and almost no wind chop.  It was totally overcast with ominous grey clouds.

In the morning, another pod of dolphins came to play at the bow. This group stayed for quite a while and did a performance for us, frequently jumping out of the water. We saw them do three spins, and we caught the third one on video!

Eric also saw a turtle in the morning. We forgot to mention that Eric had also seen a turtle a few days ago, too. 

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Exploring La Cruz de Huanacaxtle

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Wednesday, December 11, 2024 — Before we get into the day, we want to give a couple of quick backgrounds. Our beloved Gig Harbor hard sailing/rowing dinghy, Kosmopolitan, which circumnavigated the globe with us, was seriously damaged while we were in Baja. We managed to keep her floating with duct tape until we got back to San Diego. Upon return to San Diego, we replaced her with an OC Tender, which is also named Kosmopolitan. Here’s a photo of our new dinghy taken in San Diego. 

When we were in the hurricane in Baja, the boat next to us in the storm was named Lusty. The people aboard Lusty were named Karen and Max, and they may be the funnest people we’ve ever met. We had an incredible time in the Bahia de Los Angeles area, largely because Max and Karen arranged a party every night — and Karen would cater it with incredible food. Christi was amazed at what Karen could make aboard a tiny boat kitchen. 

On to our day… In the morning, Eric washed the boat, then walked over to the Port Captain’s office to check in. Meanwhile, Christi and Keith worked on school and did some cleaning inside. 

As we were leaving to go to lunch, we bumped into our neighbors and noticed they had a dinghy identical to the original Kosmopolitan. Then we noticed the name on the back was Sprezzatura, and asked if they had gotten it from our friend on the Nordhavn 40 named Sprezzatura. They confirmed it was the same dinghy, though it had changed hands a couple of times between our friend and our new neighbors. What a small world!

Our destination for lunch was a restaurant called El Ring, which was around the corner from Ballena Blanca. We noticed that the restaurant on the corner was named Lusty on Land. We knew it had to be Max and Karen’s. Especially when we saw they didn’t open until 1600 and had music every night. 

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Ensenada to Puerto Vallarta — Days 1 – 3

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Friday, December 6  — As mentioned in the last post, the sea conditions were not bad when we left Ensenada on Tuesday night. Despite the good conditions, Keith did initially get sick. But within 12-hours, he was feeling good enough to play video games

When dawn finally broke on Wednesday, we saw it was 3 – 5 foot waves with a 10-second swell period + 1 – 2 foot wind chop waves. Thanks to the long enough intervals in between the waves, it wasn’t uncomfortable. The wind was light, came from behind us, and it was overcast all day. 

Unfortunately, we were moving very slowly, only averaging 5.7 knots at 1650 RPM. Eric eventually sped us up to 1750 RPM, but our speed only improved to 5.8 knots. He’s concerned that we have a net or kelp or line stuck to our propellor or stabilizer fins that is slowing us down. He was considered stopping in Turtle Bay to dive on the bottom.

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Stabilizer Failure

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Tuesday, December 3, 2024 – It was supposed to be an uneventful day. The plan was to do chores around the boat in preparation for our 6.5-day passage to Puerto Vallarta, then head out at around 1500 (3:00 pm). 

Since we weren’t paying for another night, the marina encouraged us to leave earlier since check out is officially 1300. Their nudge turned out to be a giant blessing in disguise. Eric started up the main engine at around 1330. There was an issue with the stabilizers – when turned on, the screen said “server rebooted, call factory.” 

Eric has spent the last 1.5 years renovating Kosmos. We plan to write more extensive posts about the renovation, but for the moment we’ll summarize the work with: 1) The boat was 18-years old and many things had reached their life limit and needed to be replaced – including a lot of components on the stabilizers, and 2) We outfitted the boat 18 years ago when there were only two of us. Now that there are three of us; we needed to configure the electrical and water to be better suited for three people.  

Eric immediately called John Gumb Yacht Services, the company that did our stabilizer work, to help troubleshoot the problem. John Gumb had no silver-bullet answer, but the initial trouble shooting indicated it may have been electrical in nature. Eric called Weber Marine next, the company that did our electrical work (and more!). Weber also had no silver-bullet answer. 

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