Repairing Guides

how to repair transom

by Gordon Bartoletti DVM Published 2 years ago Updated 2 years ago
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  1. Dry the Boat. To make any repairs to your boat or transom, you first need to get your boat out of the water and into a dry ...
  2. Check the Damage. Before you remove any parts of the transom or make any repairs, it is important to assess the damage on your transom first.
  3. Remove the Transom. Cut the deck section of the transom to get to its core. Use the crowbar or hammer and chisel to carefully remove the transom.
  4. Mark and Cut the Damaged Area. You then need to draw or mark the area where you need to cut the transom. ...
  5. Cut the New Transom. After removing the damaged area, use this piece as a pattern to create a new transom. ...
  6. Add Fiberglass. Once you are done cutting the two plywood pieces, you can now fiberglass the two sheets together. ...
  7. Sand the Edges. After curing, flip the plywood and round out the edges using sandpaper or a sander. ...
  8. Install the New Transom. When you are done sanding, place the new transom onto the boat and check if it fits. ...

Part of a video titled The Easiest Way To Replace A Boat Transom - YouTube
2:07
38:35
So you could make a new wood one by buying. This is two inches thick so you're gonna have to buy aMoreSo you could make a new wood one by buying. This is two inches thick so you're gonna have to buy a couple pieces of plywood. And glue them together cut it out to fit the exact template.

How to rebuild the transom on a fiberglass boat?

How to Rebuild the Transom on a Fiberglass Boat

  • Take Plenty of Pictures First! Before you get started make sure you take a few pictures of your transom from numerous different angles.
  • Now De-Skin it! ...
  • Now the Fun begins! ...
  • Create a Template to Cut Out the New One. ...
  • Getting it Ready. ...
  • Glassing it Onto the Hull. ...
  • Filleting and Tabbing. ...
  • Cutout Your Holes. ...
  • Cover The Inside with Fiberglass. ...

How to reinforce a transom on an aluminum boat?

To reinforce your boat’s transom, you’ll need the following items:

  • Epoxy sealant
  • Sandpaper
  • Power drill (Optional)
  • Screwdrivers
  • Bits and screws
  • Adhesive tape
  • Reinforcement material

How to repair a MerCruiser Bravo transom Assembly?

This video will walk you through the process of repairing a standard Mercruiser Bravo Transom Assembly. Topics covered in the video are how-to disassemble a ...

How to install or replace boat transom straps?

Tools You'll Need

  • Jig Saw
  • Engine Hoist (if your boat is an inboard)
  • Drill and drill bits
  • check Hammer
  • check Paintbrushes

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How much does it cost to have a transom replace?

How much to fix a wet transom. Repairing a transom is a laborious exercise that can range from $3,000 to $10,000 depending on the vessel size construction and tradesmen used for the task.

Can you fix a fiberglass transom?

Label the pieces and dry fit them to the transom. Plan the cuts in each layer so the pieces are small enough to fit through the opening in the transom. Glue the layers in place. Replace the fiberglass skin and install new plywood core.

How do you rebuild a transom?

9:2613:13Complete Transom Rebuild, Step by Step How-To! Part 1 - YouTubeYouTubeStart of suggested clipEnd of suggested clipUnder it you can see the two bolts down there below. And. So we actually cut more of the transom.MoreUnder it you can see the two bolts down there below. And. So we actually cut more of the transom. Out then then we were going to previously it actually ended up being the right thing to do thankfully.

How do you replace a rotted transom?

2:1917:19Replacing a Rotted Transom Part 1 - YouTubeYouTubeStart of suggested clipEnd of suggested clipAbout here's the subfloor here's the edge of the subfloor and here's the the transom. Right here soMoreAbout here's the subfloor here's the edge of the subfloor and here's the the transom. Right here so we're going to cut above this subfloor.

Can you fix a rotten transom?

Repairing A Rotted Transom One method is to use a product like Git-Rot from BoatLIFE. This two-part liquid epoxy fills and restores the dry rot inside the wood using capillary action to penetrate it without drilling it full of holes. You can inject Git-Rot directly into the wood for more thorough penetration.

What is the best material for a boat transom?

Coosa Board is high density polyurethane foam with reinforced layers of fiberglass. The result is a material equally or superior in rigidity at a fraction of the weight of plywood. It is truly the premier decking & transom material in the marine industry.

How long do transoms last?

On to fabricating the replacement transom: Most, if not all wooden transoms in smaller boats are made of plywood. From the looks of the transom in this boat, I would estimate a typical transom will last about 20 years or so before they need to be replaced.

How thick should a boat transom be?

As for Thickness, 3 layers of 3/4" composite, skin,bonding laminates and tab layer should work out around 3 inches.

How do you replace a wood transom?

9:2625:49Aluminum Boat Transom Replacement - YouTubeYouTubeStart of suggested clipEnd of suggested clipMy old transom on there as a template and drawing it out and then of course my pencil point breaks.MoreMy old transom on there as a template and drawing it out and then of course my pencil point breaks. Getting another pencil.

Can you fill a transom with epoxy?

Treat any wood left inside with CPES™. Cut new wood and treat with CPES™ and insert into transom, clamp/epoxy-glue it to the back of the transom, fill in all gaps with either the Fill-It™ epoxy filler or a putty-mix of the L&L Resin™, and then re-glass the inside. It's real work.

Do transoms Flex?

RE: transom flex Have it checked out asap-the transome should not flex, you don't say what kind of boat you have or the size engine. You should be able to pick up the boat by the transome.

What can you make a transom out of?

0:4611:14DIY Wood Transom that will NEVER ROT OR FLEX - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo this plywood i picked up at lowe's is not a true three-quarter inch plywood it's actually 23 30MoreSo this plywood i picked up at lowe's is not a true three-quarter inch plywood it's actually 23 30 seconds which is pretty close to what we need.

How do you reinforce a fiberglass transom?

Apply epoxy to the edges of the outer fiberglass skin of the transom and over the heads of the screws holding the skin to the plywood, and lay a strip of fiberglass cloth over the epoxy. Once the fiberglass has cured, repeat this step until four layers of fiberglass and epoxy have been applied.

How do you check a transom on a fiberglass boat?

4:096:46How to identify a bad transom in a used boat. Things that stand out as ...YouTubeStart of suggested clipEnd of suggested clipBut what you can do is just hit the tilt switch a couple times bounce that motor go boom boom boomMoreBut what you can do is just hit the tilt switch a couple times bounce that motor go boom boom boom boom get a good little boom.

How do you repair a fiberglass boat?

2:2411:17Fiberglass Hull Repair - YouTubeYouTubeStart of suggested clipEnd of suggested clipFirst up after opening up the void is to smooth the edges around the damaged area using a grinder.MoreFirst up after opening up the void is to smooth the edges around the damaged area using a grinder. You see how that little voice turned into this and you can see now we're down to solid laminate.

How do you strengthen a fiberglass boat?

1:366:00How to Fiberglass a Boat - How to Build a Boat Part 7 - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo what we can do is you can take like an old shopping card mix up thickened epoxy. And pull itMoreSo what we can do is you can take like an old shopping card mix up thickened epoxy. And pull it through here like this make sure you pack it into the holes.

How to treat transom wood?

This isn’t to say that Git-Rot will require absolutely no work at all. There are a few best practices to treat your transom wood: Wait for the ideal temperature —between 50 and 70 degrees Fahrenheit. At about 70 degrees, the applied Git-Rot will solidify overnight, boosting the wood’s strength. Inject the Git-Rot into the wood’s end grain ...

What is a transom on a boat?

The transom on your boat is like the caboose on a train: it’s all anyone sees after you’ve passed. Regularly inspect this area, apply Git-Rot when needed, and you’ll go far in extending the life and quality of your boat.

Why do you need to inspect a boat transom?

Because problems like rot frequently plague boat transoms, you’re going to need to regularly inspect the transom for rot problems specifically. The good news is that there are dedicated products to help treat this kind of boat rot.

What is the area of a boat that can be overlooked?

Even when you inspect your hull regularly, there’s one area of your boat that can often get overlooked: the transom. New boat owners aren’t even aware that the surface of their boat’s stern even has its own name. But if you want your boat to look its best, checking and repairing the transom is essential. But that still leaves one question: how do ...

How to use git-rot on wood?

Inject the Git-Rot into the wood’s end grain whenever possible. Think of Git-Rot like blood moving through capillaries: in order to reach the most wood, it has to sink in and move around with the wood’s fibers. By seeking out end grain, you have more direct access to the wood’s interior, which boosts the performance of Git-Rot.

Can you use git rot on damp wood?

Inject into dry wood. While Git-Rot will eventually cure even in damp wood, it works much better in dry wood, as the epoxy solution will move around more freely and better saturate the wood.

What is a transom on a boat?

Transoms are major structural parts of fiberglass powerboats, especially outboards. Transoms not only support the weight of the motor, they maintain the shape of the boat, they are a mounting point for holdowns, towing eyes and other accessories. And, they must be able to let water out of the hull, without letting it back in.

What causes a transom to rot?

Moisture penetrates the plywood core, leading to delamination and eventual rot. Moisture can also penetrate the transom skin at hardware fasteners, around drain holes and I/O cutouts. These factors have a cumulative effect on structural failure. When the transom loses its stiffness, so does the outboard motor.

How to laminate fiberglass skin?

If your fiberglass skin is unusable, plan to laminate a new fiberglass skin over the core with multiple layers of fiberglass and epoxy. Apply them one layer at a time until the same skin thickness is achieved. Subsequent layers can be applied immediately or while the previous layer is still tacky. If the epoxy is allowed to cure beyond being tacky, allow it to cure overnight, then wash the surface with water and sand the surface to prepare it for more layers. Laminate the new skin so it extends to the edge of the 12:1 bevel that was machined earlier on the outer edges of the transom. Install the biggest patch first with each layer being progressively smaller to fill the 12:1 bevel. For additional information on laminating a large new fiberglass skin see Section 4.3 of Fiberglass Boat Repair & Maintenance (free download).

How to prevent dimpling in fiberglass?

This prevents dimpling in the fiberglass skin which would require considerable filling and fairing later. Apply auto paste wax or cooking spray to the washers or plywood ahead of time to allow for removal later, or apply a layer of plastic sheet over the fiberglass skin before applying the plywood cauls.

How does an outboard motor affect the transom?

Outboard motors apply a considerable load to the transom. The effects of the motor’s weight are magnified when the boat is accelerated under normal operating conditions , and when the boat is bouncing along on a trailer. These loads are concentrated on the fiberglass skin and core where the mount is located. Over time cracks develop. Moisture penetrates the plywood core, leading to delamination and eventual rot. Moisture can also penetrate the transom skin at hardware fasteners, around drain holes and I/O cutouts. These factors have a cumulative effect on structural failure.

How to remove fiberglass core?

Remove the fiberglass skin. Cut through the fiberglass with a router, circular saw or grinder. Preset the depth of cut carefully if you are not replacing the entire core. If you know you will be replacing all of the core, the depth can be set deeper. The skin may be stuck on areas of sound wood core.

Where does moisture penetrate transom skin?

Moisture penetrates transom skin at fasteners, drains and cutouts. Operating loads and vibrations are concentrated on the fiberglass skin and core.

How important is the transom on an aluminum boat?

Anyone with an aluminum boat knows how important the transom is. That surface area on the stern pulls together both the look and the functionality of the boat. That’s why it’s essential that you know how to effectively repair the transom when any issues arise. We’ve put together a list of tips to help you with boat transom repair—as well as some recommended products that can help you along the way.

Can you repair a boat transom with a git-rot kit?

Dry rot is one of the frequent problems for anyone repairing their alu minum boat’s wooden transom, which is why it’s a good idea to seek out a Git-Rot Kit for repair. This kit utilizes a two-part liquid epoxy that can penetrate the rot and use the natural fibers of the wood to get deeper into the wood than you might imagine.

What is the transom on a boat?

Your transom is usually the first part of the structure in a boat to go rotten and is also one of the most important structural parts of your boat - Not only does usually the most expensive investment get bolted to it, but it also ties a lot together and well without it... your swimming. So in no particular order, let's get into them!

Where is the laminate on a transom?

The front face laminate usually only goes across the face of the transom and back onto the inside of the hull approx 150-200 mm.

What does it mean when a transom is oozing?

Oozing resin is a good thing and means it has enough pressure applied to compress the laminate.

Is honeycomb good for a transom?

Honeycomb or PP sheets are an amazing lightweight product for your floor or hatches etc, but are no good for your transom due to it’s sheer strength and cell structure being easily compromised in a transom application.. Plus it’s resin up take is pretty high so what you would save on the price of the sheet would go in the amount of resin it eats up.

Can you cut a transom out of a boat?

When a transom is put into a boat, no matter what brand or size, it is completed from the inside.

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