jackedwardshepherd
New Member
Hello,
My first post on the forum! I have an old Marina 16 GT Cabin Cruiser am part of the way through replacing the rotten transom.
The boat is fully supported on the trailer and I have put additional supports under the keel along the boat.
I cut out the fibreglass from the back leaving a 100mm (or thereabouts) margin around the outside to bond the new glass and have removed the rotten transom. During this process it was apparent that the inner fibreglass skin of the transom needed to be replaced too as it was riddled with holes and looked to be only one very thin layer of glass (no wonder the transom was rotten). In the end it all went in one go as the inner skin was providing no structural support whatsoever and I figured I could replace both at the same time.
After removing everything I knocked up a template from battens and a glue gun and transferred this to the ply. Once I had traced the template I flipped it over to check for symmetry and it is out by about 30mm on the diagonals!
I know they used to throw these boats together back in the day but I struggle to believe that it would ever have had an unsymmetrical transom so am a bit stuck on what to do and it doesn’t sit well with me.
Since starting this work I have noticed that the outside stringers will need to be replaced so there is a chance that the boat has lost some of its rigidity and warped when I cut out the old fibreglass from the transom.
Thinking out loud my options are:
1. Take the template I have made and half the error on each side to achieve a symmetrical transom, then ‘persuade’ this back into the boat (possibly cutting slightly smaller then using packers on the sides before filling with epoxy) in theory pulling it all symmetrical again.
2. Try and prop up the boat on one side and pull it back into shape then remake the template (although it is very difficult to tell when the boat is symmetrical without any sort of datum to go off). Even with the best intentions this may not be achievable although a combination of this and the point above could work?
3. Stick with the slightly misshapen transom and hope it doesn’t cause too much of an issue, or accept that it may have always been like that?
In terms of play the top of the boat can be rocked from side to side slightly whereby the splashwell will move horizontally with the keel staying still so this movement may be what is needed to pull it true with some careful propping.
Unfortunately I don’t have the old glass that was cut out to rest a giant the hole to check if it has moved.
Any help or advice would be greatly appreciated!!
Cheers,
Jack
My first post on the forum! I have an old Marina 16 GT Cabin Cruiser am part of the way through replacing the rotten transom.
The boat is fully supported on the trailer and I have put additional supports under the keel along the boat.
I cut out the fibreglass from the back leaving a 100mm (or thereabouts) margin around the outside to bond the new glass and have removed the rotten transom. During this process it was apparent that the inner fibreglass skin of the transom needed to be replaced too as it was riddled with holes and looked to be only one very thin layer of glass (no wonder the transom was rotten). In the end it all went in one go as the inner skin was providing no structural support whatsoever and I figured I could replace both at the same time.
After removing everything I knocked up a template from battens and a glue gun and transferred this to the ply. Once I had traced the template I flipped it over to check for symmetry and it is out by about 30mm on the diagonals!
I know they used to throw these boats together back in the day but I struggle to believe that it would ever have had an unsymmetrical transom so am a bit stuck on what to do and it doesn’t sit well with me.
Since starting this work I have noticed that the outside stringers will need to be replaced so there is a chance that the boat has lost some of its rigidity and warped when I cut out the old fibreglass from the transom.
Thinking out loud my options are:
1. Take the template I have made and half the error on each side to achieve a symmetrical transom, then ‘persuade’ this back into the boat (possibly cutting slightly smaller then using packers on the sides before filling with epoxy) in theory pulling it all symmetrical again.
2. Try and prop up the boat on one side and pull it back into shape then remake the template (although it is very difficult to tell when the boat is symmetrical without any sort of datum to go off). Even with the best intentions this may not be achievable although a combination of this and the point above could work?
3. Stick with the slightly misshapen transom and hope it doesn’t cause too much of an issue, or accept that it may have always been like that?
In terms of play the top of the boat can be rocked from side to side slightly whereby the splashwell will move horizontally with the keel staying still so this movement may be what is needed to pull it true with some careful propping.
Unfortunately I don’t have the old glass that was cut out to rest a giant the hole to check if it has moved.
Any help or advice would be greatly appreciated!!
Cheers,
Jack
