Results 1 to 10 of 10
Thread: Cracked gelcoat
12-30-2009, 10:46 PM #1
I purchased my 1997 model Shamrock 20 WA back in October. I noticed that the outer transom portion has a vertical gelcoat crack (hairline) that runs down the middle from top to bottom. The interior of the transom appears to be fine and no leaks exist. I intend to grind it out this Spring and repair the gelcoat.
I have heard that this is a common trait. Has anyone else experienced this ?
Also does anyone know the shade of white gelcoat for that era. The Shamrock site calls it off white but it doesn't mention the years that shade covered.
12-30-2009, 10:55 PM #2
The centerline crack appearing when the boat gets older is common. It is where the two hull halves were joined at the factory. They build the boat one half at a time, right and left. The two sides are then joined after thay are removed from the mold. It is the only way thay can fabricate the fiberglass skeg into the boat strongly.
The outside of the hull has that joint down the entire centerline. Take a look at the bottom of the keel on any of these boats that has been run aground a time or two and you will see the actual seam on the bottom and the different color adhesive they used to join them.
It is an easy fix to touch up the crack, but you may have to built it in with some mat to keep it from happening again.Tow, Tow, Tow your boat.....
12-31-2009, 12:31 AM #3Irish Jig - "Wishin' I was Fishin'"
1993 26LE - Cummins 6BT 210HP/ZF63a 1.22
"Real men drive straight shafts." - Unknown
“Beer is proof that God loves us and wants us to be happy.” - Ben Franklin
"Ninety percent I'll spend on good times, women and Irish Whiskey. The other ten percent I'll probably waste." - Tug McGraw
Disclaimer: Any suggestions made in these posts are just that, suggestions.... learned from the School of Hard Knocks.... Class of 1961-present.
12-31-2009, 11:04 AM #4
Inetmug control joints in concrete are grooves cut into the concrete after curing, or scored while still wet, so the concrete will (hopefully) crack along the joint. But the control joint is not concealed.
12-31-2009, 11:16 AM #5
Thank's, I intend to tackle it in the spring. As with other gelcoat issues, I typicallly fill it and shoot the gelcoat through a gun. I then wet sand and buff. My main concern is matching the color.
I have bright white which is too bright. Worst case I will purchase a lighter shade and add some bright white to it untill it appears to match.
12-31-2009, 12:01 PM #6
SA - it will be a noble effort on your part.
But I assure you, the odds of the famous "Shamrock Crack" reappearing with a temperature change are great.
LepThree-fourths of the Earth's surface is water, and one-fourth is land. So it is quite clear that the good Lord intended us to spend triple the amount of time fishing as taking care of the lawn.
12-31-2009, 06:43 PM #7
12-31-2009, 07:05 PM #8Deck Hand
- Join Date
- Nov 2009
For my boat a shade from Bear brand paint called NUDE was it. The tint colors they add are black, oxide yellow, and magenta (a marroonish shade). There were other paint shades that were, for all practical purposes, close enough and may have used tint colors that are more standard and easily found. I will give this a try tomorrow so I can't give you any results now. Good Luck
12-31-2009, 07:55 PM #9
Thanks Pescador, good luck with your repairs.
01-01-2010, 02:04 PM #10