RV Preservation Closing and Summery Report For 2025 Season
The RV Preservation preparation work weekends were a bit longer this year. Six weeks to be exact. This was just the time we spent in Duluth. Not to mention the 5 months’ worth of time we spent on rebuilding engine.
It all started when we were having the boat pulled out for winter layup on October 15, 2024, at the dock where the boats are pulled out of the water at Spirit Lake Marina. As we were waiting and both engines were running, the starboard engine made a screeching noise, stalled then locked up as the straps were being placed under the boat to be lifted out of the water and placed on the hard for winter layup. We were able to maneuver the boat on the port engine.
Two weeks later Tim Pranke and Phil Kerber traveled to Duluth to perform diagnostics on the engine as to why it made a noise and stalled. Thankfully the engine still turned over. However, it labored quite a bit as we were attempting to turn the engine over to perform our diagnosis. In the process of diagnosis, we started removing parts to isolate the issue and disassembled it all the way down to the short block to attempt to find out what happened. Unfortunately, more time and disassembly were required to get to the bottom of the issue. The engine would have to be removed to continue with the disassembly of the engine to find what went wrong.
I couple of weeks later during the weekend of the Gales of November Conference in Duluth and on Sunday, Tim Pranke, Phil Kerber and at least 8 to 10 other members joined us, along with the Marina’s crane operator helped remove the engine load it in Phil Kerber’s enclosed trailer to transport back to Phil’s Quality Automotive Inc Service Center in Corcoran MN.
On January 25 -26, 2025 we started the final disassembly. We found that number 5 cylinder spun a rod bearing. Pushing all the spun metal contents throughout the engine. We decided that the engine was damaged to the point of having to completely rebuild it.
So, here we go! We continued with the disassembly of the starboard engine. We then stripped the engine down to the bare block, checked and measured all the engine components and created a list of tasks and parts we needed. Slowly the machining on the camshaft and crankshaft were completed in April and the parts were ordered from the UK. It took only a week to receive the order. We did have some difficulty locating certain parts and sizes. A lot of research went into this rebuild, as the engine was built from 1960 to 1964. The engine is a 590 E Lehman (DAG) 6 cylinder inline diesel. Most parts were still available but the rest o f them had to be made. Except for the oil pump. We were determined that the oil pump needed replacement. However, they are discontinued and are very hard to find. We thought we could have a machinist rebuild it but, as we thought about it, Phil remembered that the GLSPS bought a used engine from the East Coast for parts. I remembered that there was still an oil pump in it. I just hope it was a good one.
From the first part of May 2025 until middle of June 2025, I and an occasional other GLSPS members would drop by to help with something on the engine rebuild, and as we received parts to assemble it. Most of the assembly and final inspection was done by Phil Kerber.
We were slowed down by the oil pump and camshaft bearings. The cam bearings were not available anymore for the 6-cylinder model but available for the 4-cylinder model. Since the sizes of the cam bearings were the same for both 4 and 6 cylinders, I just ordered two sets. We would only have two extra bearings left over. This delayed our final assembly process by almost two weeks. So, in between the time I need to rob the used oil pump off the extra engine we have for parts.
The next thing to do was to go to my farm where the used engine is stored inside the steel machinery shed. So, on Saturday June 21, 2025, I popped over to the farm, which is only a few miles from my Automotive Service Center. Even though it was 90 degrees in the shade and inside steel shed, I started disassembly of the engine. The used engine’s oil pan had to be removed. So, with my skid loader and my brother’s help, we were able to obtain the used oil pump that we hope is still in great shape. I bolted everything back together and made a new cover for the engine to help preserve it. Headed back to the shop with used oil pump in hand.
The next day, Sunday June 22, 2025, Tim P dropped by the shop and we both disassembled the pump, cleaned and measured it. We were pleasantly surprised to find that there was very little wear in the pump housing and gears. Our issue of needing an oil pump was solved. We cleaned it up prepped and installed it that day. At this point the engine was winding down for full assembly. Tim and I painted the engine and its parts ford dark blue. I just needed to touch up some odds and ends and get ready to load into the trailer for transport to Duluth again.
On Monday June 30, 2025, we finally finished the engine enough to transport it back to the boat in Duluth.
During the July 4th weekend, which gave us some extra days to work on the boat, we finally installed the engine (part by part). We still had much to go to complete the final assembly of the engine. For the next two weeks we finished the assembly, started the engine, performed a few adjustments and tuning. After we were satisfied that the engine was ready to go, we still had to finish closing in the back wall, which was removed several weeks before to be able to install the engine. After all of that, we still needed to do the seasonal prep work before the launch, so Dale Koziol, Wim Wilcke and I prepped the boat for launch and for the season. We finally launched the RV Preservation on Monday, July 28, 2025.
During the launch and when running the boat over to the correct dock I noticed that the newly rebuilt engine’s temperature gauge was rising faster than I thought it should. So, I shut the engine down, floated it over to the dock then started the starboard engine just to aid in docking, then shut them down. In the interim of tying off the boat I (Phil K) jump up to the dock and hooked my toe and tripped to damage/cut open my right knee. I immediately had Dale Koziol drive me to Urgent Care facilities in Duluth to stitch up the rather wide gap in my knee.
When I returned to the boat I diagnosed the overheating issue on the rebuilt engine. Even though I replaced the thermostat with a brand new one from Napa, the thermostat still stuck mostly closed. I appeared to be defective, so I drove to Napa in Duluth and exchanged the thermostat for another one, along with t new gasket. Drove back to the boat and installed it. I then ran engine for about 45 minutes to an hour at 1200 RPM’s and the temp stayed steady at 180 to 185 degrees. I also found out that that batteries were shot and needed replacement. After that I went home and missed a couple of days of work to nurse my wound. Ordered two large D8 batteries for the boat.
The following weekend on Saturday, my nephew Dave Rasmussen traveled to Duluth to help install the two large and very heavy batteries. Since my nephew is young and strong, he was able to lift the two batteries in place with the assistance of a transmission scissors jack the GLSPS had to purchase to get them to the back end of the storage bilge to install them. Thank Dave for your assistance in installing those very heavy batteries!
Now I am ready for a shakedown/sea trial for the RV Preservation. Unfortunately, I didn’t have any staff or personnel to help or cruise with me. So, I thought I would call Dale Koziol, since he lives in Duluth to see if he could join me for the shakedown cruise. He graciously said yes and could meet me at about 2 PM on Sunday to do so. In the meantime, I thought it would be a great time to clean up the rest of the boat. I went to Menard's and rented a carpet cleaner and purchased cleaning ingredients. I cleaned both the carpets and bunk bed cushions. After I returned the carpet cleaning machine, I continued wiping down the inside of the boat. It smelled so nice in the boat! Frankly, I don’t think it has ever smelled that great! One of which a mother would approve!
The shake-down cruise was event free and everything was steady including the temp gauge concern I had with the rebuilt starboard engine temperature rising. All systems were steady and working great! The RV Preservation is ready and a go to be transported north to Silver Bay Marina for a couple projects that absolutely needed to be completed for a Grant we received.
August 23, 2025, we mostly completed the 3D Photogrammetry Project on the Hesper. However, the next day August 24, the wind came up and we had to scrub/cancel the event for the day. The next weekend, on Saturday August 30, we were able to complete the necessary work the Grant required for the 3D Photogrammetry we performed on the Hesper shipwreck.
On Tuesday September 16, 2025, Jim Christenson and Phil Kerber cruised the boat back to Spirit Lake Marina in Duluth for two more projects and pullout for winter layup.
The last two projects could not be completed because of the lack of underwater visibility. We need at least 15 feet of visibility to shoot 3D Photogrammetry. So, the first project we traveled out to both shipwreck sites but found out there was poor visibility. Canceled the second day and the next weekend as well.
On Monday October 13, 2025, we pulled the boat to end another GLSPS dive season. The boat was winterized that day. A couple of weeks later Sunday November 9, 2025, after the Gales of November Conference, we tarped the boat for the winter layup. She is resting nicely for the winter, and the tarp is still on the boat and tight as of this writing on December 14, 2025. This year we decided to use tie down straps under the boat rather than just cheap lines/ropes. That way the tarp would remain tight/taunt to keep it from loosening the tie ropes and flapping in the wind. If it happens to loosen up during the winter, we could just give it a quick tightening with the ratchets, and it would be good again. It’s working out great so far.
As you all can see, the GLSPS staff takes pride in making sure the society’s research vessel is reliable, safe, comfortable and all-around great boat to help preserve maritime history. It is a great benefit to being a GLSPS member. Thank is why I invite all members to join us sometime on the boat as an observer, crew, divers, or non-diver crew. Please come and enjoy what we enjoy. Some of us go through a lot of time and effort to make this boat happen!
RV Preservation Work Weekends Preparation for 2025 Season
Phil Kerber
GLSPS President
RV Preservation Captain
Safety and Dive Training Officer