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Shawn Hammer

Shawn reassembling a Yanmar 4JH4-TE marine diesel on an engine stand during a liveaboard refit.

Engines

EP55 – Sailors Maintaining Our Own Yanmar 4JH4-TE Diesel | Step-by-Step Reassembly

Step-by-step reassembly of our Yanmar 4JH4-TE diesel: cleaning, valve adjustment, seal replacement, cooling service, and the details that make an engine reliable offshore.

By Shawn Hammer Oct 5, 2025
Epoxy resin being poured onto a leveled galley countertop during a sailboat refit.

Galley

Ep54 - Epoxy Resin Countertops | Stunning White Counter Transformation

Turning a plain white galley counter into a custom epoxy resin surface—plus the prep, planning, and teamwork that make a clean pour possible.

By Shawn Hammer Sep 21, 2025
Building a lightweight galley countertop from Coosa board and fiberglass during a sailboat refit.

Galley

Ep53 - We built a new lightweight countertop (From Scratch)

We remove a heavy Corian galley counter and build a lightweight replacement from Coosa board and fiberglass—learning carpentry lessons along the way.

By Shawn Hammer Sep 7, 2025
Removing failing teak decking from a cruising catamaran during a sailboat refit.

Projects

EP52 – What If Your Teak Is Failing?

A closer look at our teak deck reveals it’s beyond saving—forcing us to strip it out and prepare for the deck work that follows in EP58.

By Shawn Hammer Aug 24, 2025
Installing a custom-designed bowsprit on a cruising catamaran crossbeam during a sailboat refit.

Refit

EP51 - Installing our new DIY bowsprit

After losing our bowsprit offshore in EP14, we install a custom-designed replacement—closing the loop on a hard-earned lesson.

By Shawn Hammer Aug 10, 2025
Patching unused thru-hull openings with fiberglass during a sailboat refit.

Refit

EP50 - Making Roam water-tight again.

We permanently patch unused thru-hulls and seal the hull—one of the most critical steps toward safely floating again.

By Shawn Hammer Jul 27, 2025
Thermal imaging camera capturing heat distribution during induction cooktop testing on a composite boat countertop.

Projects

Ep49 - Destructive testing our new epoxy countertop

We tested whether our custom epoxy composite countertop could safely support under-counter induction cooking — using thermal imaging and destructive heat testing to find out.

By Shawn Hammer Jul 13, 2025
Custom aluminum bowsprit fabricated for sailboat refit after offshore failure

Refit

Ep48 - We created a new bowsprit. What could go wrong?

After losing our bowsprit on our first offshore passage, we designed and fabricated a stronger replacement. In this episode, we prep and refine the new aluminum bowsprit before installation aboard Roam.

By Shawn Hammer Jun 29, 2025
Disassembled Yanmar marine diesel heat exchanger during refit inspection

Maintenance

EP47 - Trying to save the heat exchangers from our aging Yanmar engines | Part 1

Can we save the aging heat exchangers on our Yanmar engines — or are we risking catastrophic failure? In Part 1, we fight corrosion and weigh repair vs replacement.

By Shawn Hammer Jun 1, 2025
DIY marine toilet and waste water system installation on cruising catamaran

EP46 - Installation of new Jabsco Quiet Flush e2 toilets & waste water system

We replace both marine toilets and rebuild our entire waste water system aboard Roam — new hoses, new routing, and stainless wire clamps throughout. A less glamorous but critical refit milestone.

By Shawn Hammer May 18, 2025
Custom 3D-printed rotary cutter tools designed for removing and replacing marine thru-hulls and seacocks.

Maintenance

EP45 - Replacing Our Thru-Hulls and Seacocks Using Custom 3D-Printed Tools

Replacing every thru-hull and seacock on Roam — and designing custom 3D-printed tools to do it right. Water-tight starts below the waterline.

lock-1 By Shawn Hammer May 4, 2025
Ten months into the refit, Shawn and Geri walk through what's done, what's in flight, and what systems go back in next.

Engines

Ep44 - Real time update! How much longer will this take?

Ten months into the refit, we've crossed a turning point. The prep is done, the leaks are sealed, and systems start going back in.

By Shawn Hammer Apr 20, 2025
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