Jeanneau SO42DS, 2010. Recently discovered two parallel lines of cracks in gelcoat from beam to bow about three inches apart, and five inches from toe rail. What is underling cause: structural? Voids? Poor gelcoat install? Other.
Technician is trying to determine if void below. i am trying to understand if this can be fixed without making annual repairs.
June 2020 update. J 42DS. Had survey conducted this week and three gelcoat/fiberglass technicians look at the deck. Nobody has an explanation for the voids that run along the deck and cabin top. Very dry under surface. Everyone that looked at it said it’s just really poor workmanship by Jeanneau. Several are wondering if other Jeanneau boats were built in this fashion.
These were caused by air bubbles just under the gelcoated. Probably trapped air during production. A part of the floor would flex when some load was applied by foot or hand. They only showed up after 4 years of use.
This cracked area had the size of a dinner plate. Repair was done by drilling several holes and inject epoxy in one hole and wait till it came out the next hole.
The president of Jeanneau America Informed me by email that, that is how we build the boat. The seam between the hull and deck has a gap of about 4 inches. That gap is filled with some kind of foam instead of fiberglass or resin. I was reassured by the head of operations that the issue is not structural. There is no issue or safety or degradation or moisture infiltration.
Hi, I habe similar cracks on my Merry Fisher 795. I posted pictures in this forum in case anybody experienced the same. My boat is from 2016/17. For me it is not acceptable to have issues like this after such a short time. My dealer is waiting for an answer from Jeanneau. Most likely I will return the boat if there is no positive outcome. As said before, I am quite disappointed by the quality of these boats. Next boat will be a Scandinavian brand. Older but a lot better quality.
Our boat is from last year - built in the US plant. Yesterday we found the first sink hole just underneath the mast. The overall build quality of our boat is a mess. The teak in the cockpit started to get cracks already at the end of last season.
In the interior the boat is oozing out some orange stuff that stains the seals - especially in the head. Our list on issues gets longer. We are getting an inspector now to survey the boat to understand if it is structurally impaired and if the oozing is toxic.
Yet another problem w/right-angles: reliably filling them. When not filed: extra fragile.
Why, oh why? Style rules. "We want all lines to begin and end crisply, we're going for fully rectilinear and d**n the impact: full speed ahead." As long as it looks different than before.
The next window of styling curvaceousness commensurate with sound engineering will open eventually, once this fad has petered out-- again.
[1 kg of structural material in curves will always be stronger than 1 kg of material brought together in corners. Choices/trades: more mass to make corners stronger, skip the mass and be weaker, go with curves and get better strength for less mass. Canonical.]
I had a pre-purchase survey carried out on the boat I am purchasing and he found similar hairline cracks like these in an area usually stepped on to access pontoon and out from cockpit. Moisture readings were high. He said it was a void under gelcoat and quite common in French mass production boats. You can fair back the coating and refill, and inject filler into the void. The mast step crack/hole is important to sort out soon as water in there can give mast compression issues and long term issues with electrics inside that area.