Operation of inflatable swimming facilities inevitably confronts owners with the wear of critical components, and the most vulnerable element here is the transom board. Tranza It takes on enormous vibrational loads from the motor, constant contact with water and mechanical friction against the cylinders. Over time, even high-quality moisture-resistant plywood begins to layer, and in the passage of the fasteners, microcracks form, through which moisture penetrates into the structure of the wood.
Ignoring the first signs of destruction of the transom board can lead to catastrophic consequences right on the water: the motor can snatch from the mounts, which is fraught with the loss of expensive equipment or even the overturn of the boat. Repair of the PVC transom This is not just a cosmetic procedure, but a maintenance procedure that ensures the safety of the crew, and in this article we will discuss in detail the process of replacing and strengthening the transom plate using the available materials and tools.
⚠️ Note: If you notice that the engine mount bolts began to turn or dark rust and swelling spots appeared around them, it is strictly forbidden to operate a boat with an installed engine before repairs!
Diagnosis of the transom board condition
The first step in the restoration of the boat is a thorough defect. Visual inspection often does not give a complete picture, because the outer coating of PVC or paint can hide deep corrosion of wood. You need to knock the entire surface of the board: a deaf, non-sounding sound can indicate internal voids and layering of veneer inside the plywood.
Special attention should be paid to the entry points of fasteners. If when trying to tighten the nut, the bolt begins to "walk" or scroll along with the wood, this is a sure sign that structurality It's also worth checking the geometry of the board, if it's bent or screwed, it will lead to the wrong angle of the boat's trim and fuel overrun.
To make a more accurate diagnosis, you can use a thin drill or a sewer, carefully piercing suspicious areas in inconspicuous places (for example, under linings), if the tool enters too easily, like oil, then the wood is rotted. transom plate It should be solid and solid throughout the area.
- 🔍 Visual inspection for the presence of swelling, stratifications and rusty flows.
- 🔨 Acoustic check (tap) for internal voids.
- 📏 Check the geometry and density of the adjoining cylinder.
- 💧 Checking the moisture content of wood with a moisture meter (if the indicator is higher than 15-18%, drying or replacement is necessary).
Selection of materials and preparation of transom
The key to successful repairs is the right (material choice) and the perfect replacement for rotten board is a plywood brand (Phenolformaldehyde), which is highly moisture-resistant, and the material thickness must match the original, usually 12, 15 or 18 mm, depending on the power of the engine recommended.
In addition to the base, it is critically important to choose the right glue and impregnation. Polyurethane glue Or specialized two-component formulations based on epoxy resins will provide reliable adhesion. Do not skimp on impregnation: even moisture-resistant plywood requires additional protection of ends and surfaces, because in conditions of constant contact with water and vibration, ordinary varnishes quickly lose their properties.
The same fabric as for cylinders (PVC) or special reinforcing material is used for the transom pasting. The adhesive for the fabric should be designed specifically for the purpose of polyvinyl chlorideThese are often two-component compounds, which after polymerization create a monolithic compound that is not afraid of either water or ultrafi.
Before work begins, all surfaces must be defatted and cleaned.
| Materials | Appointment | Requirements |
|---|---|---|
| FSF phanera | The transom base | Birch, grade 2/2 or higher, without knots |
| Glue 88-NP/88-CA | Sticking together | Heat-resistant, elastic after drying |
| Epoxy resin | Impregnation and sealing | Hardener, low viscosity |
| PVC fabric | Protective coating | Density from 650 g/m2, color in tone of boat |
Dismantling the old transom and preparing the lodge
Removing an old tanning board is often more difficult than installing a new one, especially if the previous repair was done "for centuries," the main task is to separate the remains of the wood from the PVC shell without damaging the material of the cylinder itself, and this often requires careful perimeter cutting with a scalpel.
If the transom has been glued to the ground, it may be necessary to partially paste the valve or use solvents to soften the adhesive seam, however, with aggressive chemistry, you need to be extremely careful not to damage the fabric of the cylinder. After removing the "paving stones" you need to carefully clean the inner surface of the transom pocket from the residues of glue, dirt and rotten wood.
⚠️ Warning: When using solvents (acetone, white spirit), be sure to ventilate the room and work away from an open fire, as the pairs of glue and solvents are flammable and toxic!
Once cleaned, the surface is degreased, and if there are scuffs or microcracks in the transom pocket on the cylinder itself, they must be re-sealed with a remix before a new board is installed. Tightness This unit is the key to the long service of the boat.
Use a plastic spatula or an old credit card to scrape off the residues of PVC glue – metal can easily cut through the cylinder fabric.
Manufacture and impregnation of a new board
With the old board template or accurate measurements, we saw a new workpiece made of plywood of the FSF. It is important to observe all the technological holes for an outboard motor mount bolts and, if provided by the design, drain holes. The edges of the workpiece should be perfectly smooth, without barbs, which can damage the fabric during installation.
The most important stage is impregnation. Many masters limit themselves to painting, but for the sake of the art of painting. coatboard It's not enough. It's recommended that you use vacuum impregnation or multiple saturation with epoxy, and you should smear the board from all sides, paying special attention to the ends where the capillaries of the wood are open.
The impregnation process can take several days: applied a layer, allowed to soak and dry, again applied. Epoxy resin It has to fill all the pores, turn the wood into a kind of plastic, and only after complete polymerization can you start pasting.
☑️ Checklist for transfusion
PVC transomb-stamped
The PVC slate glue requires precision and temperature control, and the fabric is cut with a margin at the end gates (usually 2-3 cm on each side), the bonding process is similar to repairing balloon punctures: apply glue to both surfaces, dry, apply a second layer and connect.
The key is that there are no air bubbles between the fabric and the plywood, and each band that is glued must be carefully smoothed with a roller or a solid rubber spatula from the center to the edges, expelling air. The temperature in the room during gluing should be strictly in the range of +20... + 25 ° COtherwise, the glue may not grasp or, conversely, grab too quickly, without providing penetration.
After pasting the front and ends, the excess fabric is carefully cut off. If the design provides a soft transom (with a sticker in the cylinder), the edges of the fabric on the transmolator and the response parts on the cylinder are joined together or covered (depending on the manufacturer's technology) and glued with reinforcing tape.
- 🧴 Degreasing of glued surfaces with acetone or special means.
- 🖌️ The first layer of the stainless stain (silver).
- ⏳ Time to activate the glue (usually 5-10 minutes).
- 👐 Applying the second layer and tight connection of surfaces.
- 🔥 Warming up with a hairdryer (optional, for activation of thermal glue) and rolling roller.
Installation of transom in the boat and final assembly
When the new squirrel board is fully finished, dried and pasted, it is installed, and if the transom is removable, it is carefully inserted into the pocket, folds are straightened, and the final perimeter gluing is done, and if the transmolant is rigidly glued into the structure, the process requires special care in the docking of the seams.
Once installed, the glue must be given the final strength, which typically takes 24 to 72 hours depending on the type of glue and the ambient temperature, and early use can lead to tissue detachment at the highest stress points.
The final step is to install fasteners, and the bolts are lubricated with graphite (so they don't stick), inserted into holes, and a transom plate (if it's separate) or a motor is hung on them for inspection. Tightness The connections are checked visually and tactilely.
The secret of durability of fasteners
Use AISI 316 stainless steel bolts. Regular stainless steel (AISI 304) in salt water can corrode, and black bolts rot in one season.
High-quality transom in careful operation is 10 years or more, so saving on materials (plywood and glue) in this case is inexpedient.
Frequently Asked Questions (FAQ)
Can I use conventional plywood instead of FSF?
Plywood FC (carbamide glue) is not moisture-resistant and will quickly dissipate even if it is well impregnated, only PSF or marine plywood guarantee durability.
How to replace a special glue for PVC, if it is not available?
There are analogues, but they can be inferior in elasticity. You can use two-component polyurethane adhesives for shoes or special glues for inflatable structures, but 88-NP glue or its modern counterparts (Klejme, Texbond) remain the standard.
How do you know that the squirrel can no longer be repaired and that a complete replacement is needed?
If the board bends when pressing with the hand, crunches, or if the engine mount bolts break out along with pieces of wood - repair is useless, it is required to make a new transom plate.
Do I need to take off the transom for the winter?
If the boat is kept inflated in a warm room, no. If the boat is blown away and stored rolled up in a garage or on a balcony, it is better to remove the transom to avoid the formation of cloth "cracks" at the corners of the hard board.