Transom replacement in Mobile, AL
Mobile Bay Fiberglass Does the outboard flex when you trim it up, or when you push down on the lower unit at the ramp? Is there brown water weeping from the drain plug or the mounting bolts? Those are the classic signs of a wet transom core, and around here we see them constantly. Most transoms are plywood sandwiched between fiberglass skins, and once water gets past a bolt hole or transducer screw, our climate keeps it wet year round until the wood turns to mulch.
A rotten transom is the one problem on this page you should not put off. Everything your outboard does, every pound of thrust and every hit from a wave, loads through that panel. A core that has gone soft lets the skins flex, the flexing cracks the glass, the cracks let in more water, and in the worst cases transoms fail outright with the motor on them. Modern four strokes are heavier than the motors most older hulls were built around, which only speeds the process up. If your transom moves, the boat needs to stop working until it is fixed.
The rebuild itself is a job we have down to a rhythm. The motor and rigging come off, we cut the inner skin, dig out the old core, and grind everything back to clean glass. The new core, either structural composite or quality marine plywood depending on your budget and how you use the boat, gets bonded in with thickened epoxy, then glassed over in multiple layers tied into the hull sides and bottom. Holes get drilled, sealed and rigged properly so water never finds the core again.
Pricing runs $2,500 to $8,000 depending on hull size, the core you choose, and how much rigging has to come off and go back on. A tiller skiff sits at the bottom of that range and a twin-engine bay boat at the top. We rebuild transoms for boats from the Delta all the way to charter hulls that run out of Orange Beach, and we will tell you up front exactly what your boat needs. Call (251) 220-4157 to set up a look.
When boats come in for this
- The outboard rocks or flexes when you push on it or trim it up hard
- Brown or rusty water drips from the drain plug or motor bolts
- Cracks in the corners of the transom or around the motor mount
- The transducer or trim tab screws keep working loose
- A hollow or dead sound when you knock on the transom
- A survey or mechanic told you the transom reads wet on a moisture meter
What it costs
| Job | Typical range | What moves the price |
|---|---|---|
| Transom replacement, small skiff or jon-style hull | $2,500 to $4,000 | Single light outboard, simple rigging, smaller panel to rebuild |
| Transom replacement, bay boat or center console | $4,000 to $6,500 | Hull size, core choice, and rigging that has to come off and go back |
| Transom replacement, large or twin-engine hull | $6,000 to $8,000 | Twin rigging, bracket or jack plate work, and heavier laminate schedule |
Full ranges for every job type are on the cost guide.
How the job runs
- Sound and moisture test the transom to map how far the wet core extends.
- Pull the outboard, rigging and hardware, tagging everything for reassembly.
- Cut the inner skin and remove the old core down to clean outer glass.
- Bond in a new composite or marine plywood core with thickened epoxy.
- Laminate the new inner skin in multiple layers tied into the hull.
- Rehang the motor, seal every penetration, and test everything before delivery.
Common questions
Composite core or marine plywood, which should I pick?
Composite costs more up front and can never rot, which is why we recommend it for boats that live on the water or carry big power. Good marine plywood, properly sealed at every hole, is still a legitimate choice and saves real money on trailer boats. We will price both so you can decide.
How long is my boat down for a transom job?
Plan on two to four weeks in the shop for most boats. Cutting and coring goes fast, but lamination layers need cure time and rigging reassembly is where rushed jobs go wrong. We will give you a firm window when we see the boat, and we schedule around your season where we can.
Can I just bolt a plate over a soft transom for now?
No, and we would rather lose the sale than tell you otherwise. Plates spread load onto a core that is still rotting and can hide the problem until something breaks with the motor running. If money is tight, park the boat until the rebuild fits the budget.
Will you handle unhanging and rehanging the outboard?
Yes, motor removal, rigging and rehanging are part of the job. We tag and photograph the rigging as it comes apart, and we seal every bolt hole on the way back together. If the motor needs mechanical work while it is off, we can coordinate that too.
Get this priced for your boat
Photos plus the boat’s size gets you a written range, usually the same day.