Sailing Suria · video

What this video covers

The owner of a Lagoon 410 S2 performs a DIY maintenance overhaul on two Yanmar SD50 saildrives.0:03 The process involves removing the propeller and the bearing housing to inspect and replace the radial shaft seals (simmerrings) and O-rings.1:22 After draining the saildrive oil, the technician uses a knife blade and flat-head screwdrivers to carefully pry the bearing housing from the saildrive body, taking care not to damage the aluminum flange.3:40 The shaft is removed to inspect the gear teeth and bearings, which show no signs of wear.8:43 To address calcification and wear grooves on the shaft where the seals seat, the technician shifts the position of the new seals by approximately 2 millimeters to ensure they ride on an undamaged surface.9:55 New Viton-material seals are installed back-to-back, with the open sides facing the medium they are intended to seal—water on the outside and oil on the inside.18:49 The technician uses a custom-cut PE spacer to achieve the desired seal depth and applies marine-grade winch grease to the assembly.16:50

Boats in this video

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