Savage Dolphin Repower: Breathing New Life Into a Classic Workboat
We recently completed a full repower on a Savage Dolphin that arrived with a very tired Yanmar 2QM20, an engine that had served for decades, including time as a cray fisherman’s bait boat. The repower presented several technical challenges, but also the opportunity to significantly modernise the vessel.
The first day was dedicated to removing the old engine, gearbox, shaft and running gear for inspection. Once the components were out, it became clear the new Volvo Penta D1-20 marine engine would need to sit higher on the engine beds to achieve correct shaft alignment. Further inspection revealed extensive rot in the original timber stringers.
To ensure a long-term solution, we engaged a local shipwright from BoatWorks to rebuild the engine beds from the hull up. New timber stringers were shaped, bonded, and fully glassed into the hull as well. We also replaced sections of the surrounding floor structure. The new stringers were glassed at precisely the same angle as the shaft line, giving us perfect alignment with the new engine mounts once installation began.
The original hull skin fitting for seawater intake was undersized for the Volvo Penta cooling requirements, so we removed it and installed the correct diameter intake and seacock. The exhaust system had deteriorated beyond serviceable condition and required a complete replacement. Because the D1-20’s exhaust outlet is on the opposite side compared to the old Yanmar, we designed and routed a new exhaust system to suit the installation cleanly and safely.
At the helm, we retained the vessel’s original character by integrating the new Volvo Penta start/stop panel and tachometer into the existing dash box on the engine cover. This allowed a modern vessel control interface without compromising the vessel’s classic aesthetic.
With raw water, fuel, exhaust and electrical systems completed, we carried out precision shaft alignment checks before launching for sea trials.
On the water, the repowered Savage Dolphin achieved a top speed of 6 knots and settled into an efficient cruise at 1750 RPM. Fuel burn was remarkably low; exactly what you want from a modern small-displacement Volvo Penta diesel marine engine.
The end result is a significantly smoother, quieter and more reliable vessel with decades of dependable service ahead of it. A classic hull, now powered by modern engineering. If you’re considering a repower for your own cruiser or workboat, the transformation can be remarkable.
