Which genoa track and cars are typically fitted on a Najad 361?
I want to replace the genoa cars on my Najad 361 but cannot find a readable part number. Which track and cars were normally fitted, and how can I check that replacements will fit the existing rails?
Answer
A Najad 361 typically has side-deck genoa tracks with adjustable sheet-block cars, but check the manufacturer and track size on the boat itself. There is too little model-specific evidence to identify a universal factory fit, so the Seldén System 30 components below are candidates for comparison, not confirmed original equipment.
Check the existing track
Start with the rail and the underside of the car: these determine compatibility. A boat of this age may have replacement cars, upgraded controls or a track that has replaced the original.
Photograph the complete assembly, then look for a maker's name or stamped number on the block cheeks, car body and track end fittings. A branded sheet block offers a clue, but does not identify the rail beneath it.
Use vernier callipers to record:
- The width and thickness of the track's upper running surface.
- The overall rail height and the shape beneath its upper edges.
- The diameter and spacing of any car-locking holes.
- The mounting-bolt spacing, especially if the track needs replacing.
A nominal system size does not give the full dimensions. Two rails of similar width can have different profiles: a car that slides onto one may bind or lift incorrectly on another.
Identify the adjustment system
The simplest arrangement is a pinstop car, with a spring-loaded plunger that engages holes in the track. Lift or release the pin, reposition the unloaded car, then check that the pin has fully engaged. Seldén's pinstop arrangement uses a purpose-made track; a similar-looking perforated rail is not automatically compatible.
A rope-adjusted system has control sheaves on the car and an end control ahead of it. The car may run on sliding bearing surfaces or recirculating balls, depending on the installation. Control lines alone do not identify the bearing type.
Unload the genoa sheet before removing stops, releasing a pinstop or dismantling a car. Keep fingers clear of the loaded block and rail.
Distinguish the adjustable genoa car from an aft sheet lead car. The latter redirects the sheet towards the winch and can look like another genoa car, although it does a different job.
Compare Seldén components
If the existing fittings are Seldén, use these catalogue combinations as reference points: