Tom Rowland Podcast Episode 756 is my conversation with Dr. Mike Larkin about what really happens after you buy a used boat. Mike had a diesel engine quit on him 150 miles from land, and that scare became a master class. We get into how cooling systems actually work, why a malfunctioning seacock can choke off cooling water and trigger a thermal event, the monthly maintenance nobody tells new owners about, and the offshore safety gear you do not want to be without.
Listen now: Megaphone · Spotify · YouTube.
Dr. Mike Larkin is a fisheries scientist, experienced boater, and avid angler. He shares practical, experience-based knowledge about boat ownership and offshore fishing, including the hard lessons he learned after a serious mechanical failure far from shore.
Mike emphasizes understanding the boat's systems before you trust them offshore, especially the cooling system and through-hull fittings. He recommends learning how the engine takes in and circulates cooling water, inspecting seacocks, and establishing a maintenance routine rather than assuming the previous owner kept up with everything.
Mike explains the most likely cause was a thermal event tied to the seacock valve that controls seawater flow into the engine. When that valve malfunctioned or got stuck, it restricted the cooling water, which let the engine overheat and shut down far from land. It is a vivid example of how a small part can cause a big problem.
A seacock is a valve on a through-hull fitting that controls the flow of seawater into systems like engine cooling. Mike explains that if a seacock sticks or fails, it can cut off the cooling water the engine depends on, leading to overheating. Knowing where your seacocks are and keeping them working is basic but critical.
Mike walks through the safety gear that matters when you are far from help, the kind of equipment that turns an emergency into an inconvenience. He stresses preparing for the failure you hope never happens, because help is a long way off when something goes wrong 150 miles out.
Tom Rowland Podcast Episode 756 with Dr. Mike Larkin is available on Megaphone, Spotify, YouTube, and the Tom Rowland Podcast feed. The video version is embedded at the top of this page.
I wanted Mike back on because his story is every boat owner's nightmare and a perfect teaching tool. He had an engine die 150 miles offshore, and instead of just telling a scary story he turned it into a clear lesson about systems most of us ignore until they fail. I have spent my whole life around boats and I still learned things from this conversation. If you own a boat, especially a used one, I wanted you to hear it before you need to.
Press play in the player above to hear it.
Mike tells the story of his diesel shutting down far from land and walks through what was actually happening inside the engine. It is the kind of failure that sounds rare until it happens to you. Hear how it unfolded in the episode.
Mike breaks down the path cooling water takes through the engine and why understanding it is the difference between catching a problem early and getting stranded. Listen to that section of the conversation.
Mike covers the routine checks most new boat owners never hear about, the small habits that prevent big failures. Press play in the YouTube player above.
Mike runs through the offshore safety gear that matters when help is hours away, and why preparing for the worst case is non-negotiable. Worth hearing in full.
Listen to the full conversation: Megaphone · Spotify · YouTube.
What I took from Mike is that a boat is a collection of systems, and the moment you stop respecting that is the moment one of them teaches you a lesson. His seacock story is going to make me check mine.
If you just bought a used boat, do not assume the last owner kept up with everything. Learn the systems, build the routine, and carry the safety gear.
Press play in the player above, or grab Episode 756 on Megaphone or Spotify.
Dr. Mike Larkin · Tom Rowland (host)
The Tom Rowland Podcast brings you long-form conversations with the most accomplished anglers, hunters, conservationists, and outdoor professionals in the game. Listen to every full-length Tom Rowland Podcast interview.
Dr. Mike Larkin is a fisheries scientist, experienced boater, and avid angler who shares practical knowledge about boat ownership and offshore fishing. After a diesel engine failure 150 miles offshore tied to a malfunctioning seacock, he has become an advocate for understanding boat systems, especially cooling and through-hull fittings, keeping up with routine maintenance, and carrying the safety equipment that matters when you are far from shore.
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