BoatworksToday · video

What this video covers

A 1972 Bertram Moppy 25 undergoing a twin-inboard to twin-outboard conversion requires transom reinforcement to handle the concentrated stresses of an Armstrong bracket.0:41 The original transom design lacks the structural integrity to support the weight and leverage of outboards.1:08 To address low spots and achieve a uniform curvature for mounting a Kusa core panel, the repair requires a structural fill.4:12 A simple jig made of quarter-inch hardboard and a dowel identifies areas needing up to a quarter-inch of build.7:22 A 24-ounce batch of epoxy thickened with milled glass fibers for strength and silica for body is applied to the transom.12:24 The mixture sags during the curing process, creating runs and requiring additional surface correction.17:32 Using slow hardener provides necessary working time for large batches, though smaller, sequential applications may prevent sagging in vertical applications.12:34

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