Electrical 7 min read
Rewiring a J/92s from scratch: a 12V electrical refit
Rebuilding the 12V system on a J/92s to cut fire and failure risk: star topology, dedicated feeds, layered protection and clear labelling.
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BLOG — JAMAIS
Refitting a J/92s, decision by decision.
The technical notebook of JAMAIS — method, materials, reasoning. Each post explains why a choice was made, what was tried and what holds up on the water.
Featured
Engine
3 posts
Engine 2 min read
Sealing the engine-bay woodwork: Veneziani varnish on a J/92s
Protecting the engine-bay woodwork of a J/92s on Lake Geneva with Veneziani Wood Line one-part varnish: why seal it, and why a matt base and two gloss coats.
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Engine 5 min read
Volvo Penta D1-13 Service: Genuine Parts and the Calendar Rule
Servicing a Volvo Penta D1-13 on a J/92s: genuine dated parts, the 12-month calendar rule, two oil changes, and a pre-filter upgrade.
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Engine 3 min read
Folding Propeller and Sail Drive Service on a J/92s
Servicing a Gori folding propeller and coating an aluminium Sail Drive leg on a J/92s: why they need different care than a fixed prop.
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Rigging
3 posts
Rigging 5 min read
Refitting a J/92s cockpit: XTS clutches and a cascade vang
Rebuilding a J/92s cockpit: Spinlock XTS clutches and a Dyneema cascade vang for more power and a cleaner, more ergonomic deck layout.
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Rigging 3 min read
Re-running Dyneema halyards: Marlow D2 Racing on a J/92s
Re-running the halyards of a J/92s on Lake Geneva in Marlow D2 Racing 8 mm: why size down, the colour logic, and terminations you can't drop overboard.
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Rigging 4 min read
Mast chock and tuning: bringing a J/92s back into trim
On a J/92s, a risen mast chock was a structural risk. Resetting it meant dropping all tension and redoing rake, centring and tensions.
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Electrical
2 posts Electrical 7 min read
Rewiring a J/92s from scratch: a 12V electrical refit
Rebuilding the 12V system on a J/92s to cut fire and failure risk: star topology, dedicated feeds, layered protection and clear labelling.
Read next
Electrical 3 min read
Sizing 12V Breakers on a Sailboat: Osculati or E-T-A
Choosing and sizing 12V breakers on a J/92s: separate breaker + rocker architecture, Osculati vs E-T-A, and channel-by-channel amperage logic.
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Hull
4 posts
Hull 4 min read
Freshwater Sailboat Antifouling: Sanding to Thin Film Graphite
Renewing antifouling on a J/92s for Lake Geneva: sanding hull and appendages to a sound base, then three coats of hard graphite Thin Film.
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Hull 3 min read
Gelcoat Hull Repair: Fixing a Chipped Bow and Scratched Topside
Repairing a chipped bow and scratched port topside on a J/92s: two-component gelcoat, progressive sanding, spray finish and polishing to a bright, even hull.
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Hull 5 min read
Sailboat Bulkhead Repair: Epoxy Injection and Gelcoat Finish
Repairing cracked structural bulkheads on a J/92s with epoxy injection (West System Six10), a spray gelcoat finish, and a repainted bilge.
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Hull 4 min read
Repositioning a Boat Swim Ladder: Rebuilding the Cockpit Floor
Repositioning leaking swim-ladder sockets on a J/92s: FP4-filled holes, bonded backing plates, and a rebuilt, watertight cockpit floor.
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Systems
5 posts
Systems 3 min read
Stern safety refit: horseshoe buoy, stanchion and stern light
Restoring a J/92s stern safety station: an Osculati horseshoe buoy kit, a straightened stanchion, and a re-welded stern-light plate.
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Systems 5 min read
Two bilge pumps, not one bigger one: the redundancy that matters
A manual and an automatic bilge pump on a J/92s: FP4 cockpit reinforcement, automatic float-switch operation, and a waterproof fuse holder.
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Systems 6 min read
Solar Ventilation: Keep a Sailboat Interior Dry and Mould-Free
An autonomous solar vent on a J/92s: a low-to-high air circuit, 25 m³/h extraction with no drain on the batteries, and a mould-free interior.
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Systems 3 min read
The Sub-100-Franc Ladder That Gets You Back Aboard Alone
Fitting an Osculati emergency ladder on a J/92s on Lake Geneva: why it's essential when sailing solo, and the FP4 reinforcement that stops it tearing a thin transom.
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Systems 3 min read
Rudder bearings on a J/92s: why change them
How and why to change the rudder-shaft bearings on a J/92s: the two bearings differ by design, the lower one a JEFA self-aligning roller bearing.
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