Home made fuel polishing system: NO MORE DIESEL BUG! - (Episode 351)
15 de febrero de 2026 · 23 min · 190K visitas · Langkawi Island
Crew in white suits apply fiberglass to catamaran hull.
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The owner of a Lagoon 450 installs a custom fuel polishing and transfer system to mitigate diesel bug and enable cross-tank fuel management. The design utilizes existing Racor water separators and a new 10-liter-per-minute pump to circulate fuel between port and starboard tanks.▶ 3:36 During testing, the system achieved a flow rate of 5.7 liters per minute, exceeding the Racor filter’s 3.75-liter-per-minute specification.▶ 12:46 To address the excessive flow, the owner considers throttling the supply valve or installing a flow meter to monitor transfer rates.▶ 14:18 The setup includes one-way valves on engine return lines to prevent back-feeding and allows for isolating tanks during engine operation.▶ 5:05 Separately, the crew performs hull repairs on the hard, using polyester resin for areas above the waterline and epoxy for submerged sections.▶ 16:54 After drying moisture-damaged balsa core for two weeks, the team applies fiberglass layers to restore hull integrity.▶ 21:35
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