Morgan 41 Classic

[Aspen22]

Looking at a Morgan 41 Classic (Catalina) sloop there's these arching lines in the hull. Do think this is cracking or damage to the hull? Possibly from Jack stands?

Boat was on the hard for 2 years. I still need to see the boat in person. I'm hoping some of the knowledgeable people here might know what this could be.

[psk125]

Hard to tell anything from that photo. Are the lines cracks or ridges? Could it be from someone laying strokes of paint with a spray gun? Depending upon where they are on the hull could it be oil canning? A larger photo that shows where it is on the hull and what the rest of the hull looks like might be helpful.

[Aspen22]

Here is the approximate location (on the other side starboard). I don't have a further out zoom picture of that side. I have not seen the boat in person yet. It's a bit of a drive to go see it.

[Don C L]

I'd want to be able to look at bulkheads and tabbing inside there. If it were me I'd look into hiring a local surveyor to go look at it for me first, even if only to look at the hull issues, before taking a long drive.

[pcmm]

If the location of the lines is at approx the same location on the starboard side, I would expect the lines to be in the blue paint not white to me the second photo looks more like a plastic covering not the hull.

[Aspen22]

Originally Posted by pcmm

If the location of the lines is at approx the same location on the starboard side, I would expect the lines to be in the blue paint not white to me the second photo looks more like a plastic covering not the hull.

Those 2 photos are 2 years apart. The close ups are real time. The bottom paint is wore down or became bleached from the sun.

[pcmm]

The second picture almost looks like filled in thruhulls. Ask the owner.

I've filled in a lot of thruhuills on my Morgan Out Island. I started out with 22, now only have 6

[Mickeyrouse]

From here, it doesn’t look like anything deep in the fiberglass. My guess would be some effect of yard work, like painting or paint removal, or water splashes, etc. But that survey is still pretty important, no matter.

[psk125]

After viewing adtl photos now agree with Mickey; it looks like someone applied antifouling with a roller and left a series of ridges with extra paint off the end of the roller. They have remained while the thinner areas of paint have eroded. Please note that this is a Morgan Out Island 41, not the Morgan 41 Classic. The through-hulls are apparently for the head, which looks like it is in this area, and there are bulkheads. The marks don't seem to follow anything involving the bulkheads, however. You may have to take a drive to see for yourself.

[pcmm]

Originally Posted by psk125

After viewing adtl photos now agree with Mickey; it looks like someone applied antifouling with a roller and left a series of ridges with extra paint off the end of the roller. They have remained while the thinner areas of paint have eroded. Please note that this is a Morgan Out Island 41, not the Morgan 41 Classic. The through-hulls are apparently for the head, which looks like it is in this area, and there are bulkheads. The marks don't seem to follow anything involving the bulkheads, however. You may have to take a drive to see for yourself.

You are incorrect here, it most definitly is a "Morgan Out Island 41 Classic". Only the Classic had a fin keel.

[psk125]

Originally Posted by pcmm

You are incorrect here, it most definitly is a "Morgan Out Island 41 Classic". Only the Classic had a fin keel.

Sorry. Was going by this:https://sailboatdata.com/sailboat/morgan-41/,
and comparing it with this:
https://sailboatdata.com/sailboat/mo...nd-41-classic/

[Aspen22]

Went to see the vessel in person. I think its possible damage from "oil canning". They seem to be small hairline cracks. I did sound the area and did notice a change in pitch. I unfortunately was unable to see the inside of the hull in that area.. Need to pull off a panel (right behind the forward head). Will be doing this for the survey. Just did not have to tool to do it unfortunately.

This was the worst area. The bottom paint appears to be chipping off. The hairline crack is thinner than the thickness of a finger nail but big enough to fell it "catch".

[pcmm]

Originally Posted by Aspen22

Went to see the vessel in person. I think its possible damage from "oil canning". They seem to be small hairline cracks. I did sound the area and did notice a change in pitch. I unfortunately was unable to see the inside of the hull in that area.. Need to pull off a panel (right behind the forward head). Will be doing this for the survey. Just did not have to tool to do it unfortunately.

This was the worst area. The bottom paint appears to be chipping off. The hairline crack is thinner than the thickness of a finger nail but big enough to fell it "catch".

To me that looks like failed barrier coat. For that to be "oil canning" the event would have to have been very significant. The hull in that area is over 3/4" thick. I know I filled in more than a few through hulls in my OI. takes over 15 layers of 1708 to properly fill in a patch + 5-6 on the inside too.

As you get lower in the hull the glass is over 1 inch thick and up at the sheer its between 5/8 and 3/4 thick..

[Aspen22]

Originally Posted by pcmm

To me that looks like failed barrier coat. For that to be "oil canning" the event would have to have been very significant. The hull in that area is over 3/4" thick. I know I filled in more than a few through hulls in my OI. takes over 15 layers of 1708 to properly fill in a patch + 5-6 on the inside too.

As you get lower in the hull the glass is over 1 inch thick and up at the sheer its between 5/8 and 3/4 thick..

Thanks, I did think it was possibly the barrier coat. Just strange the pattern of the cracks in a circular pattern.