Which genoa track and cars are typically fitted on a Jeanneau Sun Odyssey 36i?
I'm trying to identify the genoa tracks and cars on my Jeanneau Sun Odyssey 36i before buying replacements. Are they normally Harken, and which measurements do I need to make sure a new car will fit?
Answer
Harken commonly supplied original genoa hardware for the Jeanneau Sun Odyssey 36i, but the boat name alone does not identify a replacement car you can safely order. Check the maker's markings, track cross-section and car arrangement first, as the build year, equipment package and later replacements can affect what fits.
Identify the fitted hardware
Start with the existing genoa car, the assembly carrying the sheet block on each side deck. Look for a manufacturer's name or part number on the block cheeks, car body and track end fittings. Wash off salt and dirt with fresh water and a soft brush before ruling out any markings.
Harken-branded winches offer a clue, but do not prove that the tracks and cars are Harken too. A previous owner may have replaced the blocks, cars or complete tracks separately.
Record these details before contacting a supplier:
- The boat's build year and hull identification number.
- Any numbers or logos on the car, block and end stops.
- Whether the car locks with a spring-loaded pin or moves using control lines.
- Whether it slides on plain bearing surfaces or runs on ball bearings.
Photograph the complete assembly from above and from the side. Include a clear view of the exposed track end to help identify its profile.
Measure the track profile
Use a vernier calliper to measure the track's top width, overall height, base width and upper flange thickness. If replacing the track itself, also record its length, fixing-hole spacing and bolt diameter.
Nominal width is only a starting point. Tracks described as 27 mm, 30 mm or 32 mm belong to different product families. Even two tracks with the same advertised width can have incompatible profiles. The underside of the car must match the rail's flange and shoulders, with the correct running clearance.
Distinguish between these arrangements:
- T-track: a recognisable overhanging top flange, often used with a sliding, pin-stop genoa car.
- Ball-bearing track: shaped running surfaces designed for a particular bearing car and manufacturer's system.
- Line-adjustable car: control blocks or attachment points allowing fore-and-aft adjustment; this arrangement alone does not identify the rail.